may 12, 2018 re: engineering certification for the snapnrack rl … · 2019. 7. 12. · may 12,...

May 12, 2018

SnapNrack

775 Fiero Lane, Ste. 200

San Luis Obispo, CA 93401

Attn.: SnapNrack - Engineering Department

Re: Engineering Certification for the SnapNrack RL Rail-less System (2017-00240-B.01)

PZSE, Inc. - Structural Engineers has reviewed SnapNrack’s RL System and UL 2703 based testing performance of the

complete system including mounts, splice elements and PV Panels. All information, data and analysis contained within

the SnapNrack RL mount spacing tables are based on, and comply with the following codes:

1. Minimum Design Loads for Buildings and other Structures, ASCE/SEI 7-10

2. 2006-2015 International Building Code, by International Code Council, Inc.

3. 2006-2015 International Residential Code, by International Code Council, Inc.

4. AC428, Acceptance Criteria for Modular Framing Systems Used to Support Photovoltaic (PV) Panels, November

1, 2012 by ICC-ES

5. 2015 National Design Specification for Wood Construction (NDS), by the American Wood Council

Following are typical specifications to meet the above code requirements:

Design Criteria: Ground Snow Load = 0 - 90 (psf)

Basic Wind Speed = 110 - 180 (mph)

Roof Mean Height = 0 - 60 (ft)

Roof Pitch = 0 - 90 (degrees)

Exposure Category = B, C & D

Attachment Spacing: See attached RL System Spacing Tables.

Cantilever: Maximum cantilever length is L/3, where “L” is the spacing noted in the Spacing Tables,

provided there is at least 1 module length between maximum cantilevers. See Figure

1.0.

Clearance: 2” to 10” clear from top of roof to top of PV panel.

Tolerance(s): 1.0” tolerance for any specified dimension in this report is allowed for installation.

Installation Orientation: Landscape - PV Panel long dimension is parallel to ridge/eave line of roof and the PV

panel is mounted on the long side.

Portrait - PV Panel short dimension is parallel to ridge/eave line of roof and the PV panel

is mounted on the short side.

RL System Spacing Tables assume maximum panel dimensions are: 67”x39”

Irregular Array Geometry:

Irregular Array Geometries such as those with staggered rows may require additional mounts to support the irregular

module cantilevers. To reduce the amount of roof penetrations for such array geometries, SnapNrack’s Row Link is

permitted for use only when adhering to all the following guidelines:

1) Row Link(s) shall occur within 1” - 6” from the nearest adjacent Module Panel Edge.

2) A Row link shall only occur between two roof attachments in the same row

3) Roof Attachment spacing’s (RL System Spacing Tables) shall not be exceeded with the use of Row Links.

4) A Maximum of (2) roof attachments per Module may be replaced with Row Link(s).

See Sheet SD-00713 for further detail.

Attachment to Roof:

The attached spacing tables include consideration of the attachment device capacity, based on UL 2703 load testing

performed by SnapNrack. Tested load values are developed with 5/16” Ø lag screws with an effective embedment of 2-

1/2” into a Douglas Fir substrate, with a reference withdrawal (uplift or pullout) load capacity of 532 lb, and a reference

shear (side or lateral) load capacity of 270 lb for resisting short-term wind or seismic loads. Reference values are the

base values, before any adjustment is made per the NDS. Installations into alternate substrates or which use alternate

fasteners shall be permitted; provided that the fastener has tested or code-derived allowable load capacities, and meets

one of the following two criteria: A) The allowable load values for the alternate fastener shall meet or exceed the

allowable values noted above for the 5/16” Ø lag screws in Douglas Fir; or B) the mount spacing identified in the

“spacing tables” shall be reduced according to the more restrictive of the following two formulas:

�� = �� ∗�� ℎ��

532 �

Or

�� = �� ∗�� ℎ��

270 �

These formulas shall not be used to increase the allowable spacing beyond that listed in the spacing tables.

Components and Cladding Roof Zones:

The Edge Zones of the roof shall be determined based on the building’s least horizontal dimension (LHD). The Edge Zone,

“a”, is equal to 10% of the LHD (a = 0.1 * LHD) where “a” shall not be taken as less than 3 feet. For this packet, we

assume building LHD less than 60 feet. For greater values, further analysis is required to determine proper Edge Zones.

See Detail 1.0.

2 of 28

Panel with Support Mounts in Multiple Roof Zones:

Edge and Corner Zone spacings (Zone 2 & 3, respectively) apply only to mounts located in those Zones, not to all the

mounts supporting the module.

Detail 1.0: Roof Edge and Corner Zones

Notes: 1) Tables are determined for RL system only and do not include roof capacity check.

2) Risk Category II per ASCE 7-10.

3) Topographic factor, kzt is 1.0.

4) Average parapet height is 0.0 ft.

5) Wind speeds are LRFD values.

6) Attachment spacing(s) apply to a seismic design category E or less.

3 of 28

Structural Details

Part Number: Description: Date: Rev:

SD-00700 System Overview, Flashtrack Comp 8/22/2018 B

SD-00701 System Detail, Deck Mount 8/22/2018 A

SD-00702 System Layout, Landscape 8/22/2018 B

SD-00703 System Layout, Portrait 8/22/2018 B

SD-00704 System Detail, Hardware 8/22/2018 B

SD-00706 System Detail, C Link 6/19/2017 A

SD-00708 Penetration Detail, Flashtrack Comp 8/22/2018 B

SD-00709 System Detail, Ridge Extension Hardware 8/22/2017 A

SD-00713 System Overview, Row Link 5/19/2018 A

Design Responsibility:

These tables are intended to be used under the responsible charge of a registered design professional where required by

the authority having jurisdiction. In all cases, these tables should be used under the direction of a design professional

with sufficient structural engineering knowledge and experience to be able to:

• Evaluate whether these tables are applicable to the project, and

• Understand and determine the appropriate values for all input parameters of these tables.

This letter certifies that the SnapNrack RL Rail-less System, when installed according to the limitations of this letter and

the attached spacing tables, is in compliance with the above codes and loading criteria. This certification excludes

evaluation of the building structure to support the loads imposed on the building by the array; including, but not limited

to: strength and deflection of structural framing members, fastening and/or strength of roofing materials, and/or the

effects of snow accumulation on the roof. This requires additional knowledge of the building and is outside the scope of

the certification of this racking system.

If you have any questions on the above, do not hesitate to call.

Prepared by:

PZSE, Inc. – Structural Engineers

Roseville, CA

SCALE:PART NUMBER:

Solar Mounting Solutions

G.McPheetersE.Figurski

ADD DECK MOUNTNEW

8/22/20186/20/2017

B

REVISION:A

APPROVED BY:DRAWN BY:

RL ALLOWABLE CANTILEVER

DNS

INSPECTOR:

ASSEMBLER:

DESCRIPTION:

THE INFORMATION IN THIS DRAWING IS CONFIDENTIAL AND PROPRIETARY. ANYREPRODUCTION, DISCLOSURE, OR USE THEREOF IS PROHIBITED WITHOUT THE

WRITTEN CONSENT OF SUNRUN SOUTH LLC.

595 MARKET STREET, 29TH FLOOR ● SAN FRANCISCO, CA 94105 USAPHONE (415) 580-6900 ● FAX (415) 580-6902

Sunrun South LLC

MODULE CANTILEVER IS THE DISTANCE BETWEEN THE MODULE EDGE AND THE CENTERLINE OF THE FLASH TRACK. MAXIMUM CANTILEVER (NOT TO SCALE) IS PERMITTED TO BE L/3 WHERE L IS THE CORRESPONDING MAXIMUM SPACING NOTED IN THE TABLE(S) SO LONG AS THE SPACING BETWEEN CANTILEVERS (Y) ISGREATER THAN OR EQUAL TO (1) PANEL LENGTH. PANEL LENGTH IS DEFINED AS THE MODULE DIMENSION PARALLEL TO THE EAVE. WHEN A CANTILEVER LENGTH EXCEEDS L/3, MOUNTING THE RL FLASH TRACK DIRECTLY TO THE ROOFDECK IS ACCEPTABLE TO ADD SUPPORT TO THE OVER-EXTENDED CANTILEVER. SEE APPENDIX FOR ALLOWABLE CONDITIONS AND DETAIL SD-00701 FOR INSTALLATION REQUIREMENTS. IN ALL OTHER CASES, THE MAXIMUM CANTILEVER LENGTH IS LIMITED TO 1/3 OF THE MOUNT SPACING AND CANNOT EXCEED 2'-0".

MOUNT SPACING, L(# OF SPACINGS VARY)

CANTILEVERLENGTH

CANTILEVERLENGTH

RAFTER

ROOFDECK

RL MOUNT

MODULE

Figure 1.0

SPACING BETWEEN CANTILEVERS, Y

SnapNrack RL Zone 1 / Zone 2 / Zone 3 Spans (inches)

[Landscape] [0-30 ft]

110 115 120 130 140 150 160 170 180

θ < 7 72 / 72 / 72 72 / 72 / 69 72 / 72 / 63 72 / 72 / 54 72 / 72 / 46 72 / 63 / 40 72 / 55 / 35 72 / 49 / 31 72 / 43 / 27

7 < θ ≤ 27 72 / 72 / 72 72 / 72 / 72 72 / 72 / 68 72 / 72 / 58 72 / 72 / 49 72 / 67 / 43 72 / 58 / 37 72 / 51 / 33 72 / 46 / 29

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 65 / 65

45 < θ ≤ 90 72 72 72 72 72 72 70 62 55

θ < 7 72 / 72 / 53 72 / 72 / 49 72 / 71 / 45 72 / 60 / 38 72 / 51 / 32 72 / 44 / 28 72 / 39 / 24 63 / 34 / 22 56 / 30 / 19

7 < θ ≤ 27 72 / 72 / 58 72 / 72 / 52 72 / 72 / 48 72 / 63 / 41 72 / 54 / 35 72 / 47 / 30 72 / 41 / 26 70 / 36 / 23 62 / 32 / 21

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 67 / 67 71 / 58 / 58 62 / 52 / 52 55 / 46 / 46

45 < θ ≤ 90 72 72 72 72 65 56 49 44 39

θ < 7 72 / 71 / 53 72 / 71 / 49 72 / 59 / 37 72 / 50 / 32 72 / 43 / 27 69 / 37 / 23 60 / 32 / 21 53 / 29 / 18 47 / 25 / 16

7 < θ ≤ 27 72 / 72 / 48 72 / 69 / 44 72 / 63 / 40 72 / 53 / 34 72 / 45 / 29 72 / 39 / 25 67 / 34 / 22 59 / 30 / 19 52 / 27 / 17

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 65 / 65 68 / 56 / 56 59 / 49 / 49 52 / 43 / 43 46 / 38 / 38

45 < θ ≤ 90 72 72 72 64 55 47 42 37 33

θ < 7 72 / 72 / 72 72 / 72 / 69 72 / 72 / 63 72 / 72 / 54 72 / 72 / 46 72 / 63 / 40 72 / 55 / 35 72 / 49 / 31 72 / 43 / 27

7 < θ ≤ 27 72 / 72 / 72 72 / 72 / 72 72 / 72 / 68 72 / 72 / 58 72 / 72 / 49 72 / 67 / 43 72 / 58 / 37 72 / 51 / 33 72 / 46 / 29

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 65 / 65

45 < θ ≤ 90 72 72 72 72 72 72 70 62 55

θ < 7 72 / 72 / 53 72 / 72 / 49 72 / 71 / 45 72 / 60 / 38 72 / 51 / 32 72 / 44 / 28 72 / 39 / 24 63 / 34 / 22 56 / 30 / 19

7 < θ ≤ 27 72 / 72 / 58 72 / 72 / 52 72 / 72 / 48 72 / 63 / 41 72 / 54 / 35 72 / 47 / 30 72 / 41 / 26 70 / 36 / 23 62 / 32 / 21

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 67 / 67 71 / 58 / 58 62 / 52 / 52 55 / 46 / 46

45 < θ ≤ 90 72 72 72 72 65 56 49 44 39

θ < 7 72 / 71 / 53 72 / 71 / 49 72 / 59 / 37 72 / 50 / 32 72 / 43 / 27 69 / 37 / 23 60 / 32 / 21 53 / 29 / 18 47 / 25 / 16

7 < θ ≤ 27 72 / 72 / 48 72 / 69 / 44 72 / 63 / 40 72 / 53 / 34 72 / 45 / 29 72 / 39 / 25 67 / 34 / 22 59 / 30 / 19 52 / 27 / 17

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 65 / 65 68 / 56 / 56 59 / 49 / 49 52 / 43 / 43 46 / 38 / 38

45 < θ ≤ 90 72 72 72 64 55 47 42 37 33

θ < 7 72 / 72 / 72 72 / 72 / 69 72 / 72 / 63 72 / 72 / 54 72 / 72 / 46 72 / 63 / 40 72 / 55 / 35 72 / 49 / 31 72 / 43 / 27

7 < θ ≤ 27 72 / 72 / 72 72 / 72 / 72 72 / 72 / 68 72 / 72 / 58 72 / 72 / 49 72 / 67 / 43 72 / 58 / 37 72 / 51 / 33 72 / 46 / 29

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 65 / 65

45 < θ ≤ 90 72 72 72 72 72 72 70 62 55

θ < 7 72 / 72 / 53 72 / 72 / 49 72 / 71 / 45 72 / 60 / 38 72 / 51 / 32 72 / 44 / 28 72 / 39 / 24 63 / 34 / 22 56 / 30 / 19

7 < θ ≤ 27 72 / 72 / 58 72 / 72 / 52 72 / 72 / 48 72 / 63 / 41 72 / 54 / 35 72 / 47 / 30 72 / 41 / 26 70 / 36 / 23 62 / 32 / 21

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 67 / 67 71 / 58 / 58 62 / 52 / 52 55 / 46 / 46

45 < θ ≤ 90 72 72 72 72 65 56 49 44 39

θ < 7 72 / 71 / 53 72 / 71 / 49 72 / 59 / 37 72 / 50 / 32 72 / 43 / 27 69 / 37 / 23 60 / 32 / 21 53 / 29 / 18 47 / 25 / 16

7 < θ ≤ 27 72 / 72 / 48 72 / 69 / 44 72 / 63 / 40 72 / 53 / 34 72 / 45 / 29 72 / 39 / 25 67 / 34 / 22 59 / 30 / 19 52 / 27 / 17

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 65 / 65 68 / 56 / 56 59 / 49 / 49 52 / 43 / 43 46 / 38 / 38

45 < θ ≤ 90 72 72 72 64 55 47 42 37 33

θ < 7 72 / 72 / 72 72 / 72 / 69 72 / 72 / 63 72 / 72 / 54 72 / 72 / 46 72 / 63 / 40 72 / 55 / 35 72 / 49 / 31 72 / 43 / 27

7 < θ ≤ 27 72 / 72 / 72 72 / 72 / 72 72 / 72 / 68 72 / 72 / 58 72 / 72 / 49 72 / 67 / 43 72 / 58 / 37 72 / 51 / 33 72 / 46 / 29

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 65 / 65

45 < θ ≤ 90 72 72 72 72 72 72 70 62 55

θ < 7 72 / 72 / 53 72 / 72 / 49 72 / 71 / 45 72 / 60 / 38 72 / 51 / 32 72 / 44 / 28 72 / 39 / 24 63 / 34 / 22 56 / 30 / 19

7 < θ ≤ 27 72 / 72 / 58 72 / 72 / 52 72 / 72 / 48 72 / 63 / 41 72 / 54 / 35 72 / 47 / 30 72 / 41 / 26 70 / 36 / 23 62 / 32 / 21

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 67 / 67 70 / 58 / 58 62 / 52 / 52 55 / 46 / 46

45 < θ ≤ 90 72 72 72 72 65 56 49 44 39

θ < 7 72 / 71 / 53 72 / 71 / 49 72 / 59 / 37 72 / 50 / 32 72 / 43 / 27 69 / 37 / 23 60 / 32 / 21 53 / 29 / 18 47 / 25 / 16

7 < θ ≤ 27 72 / 72 / 48 72 / 69 / 44 72 / 63 / 40 72 / 53 / 34 72 / 45 / 29 72 / 39 / 25 67 / 34 / 22 59 / 30 / 19 52 / 27 / 17

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 65 / 65 68 / 56 / 56 59 / 49 / 49 52 / 43 / 43 46 / 38 / 38

45 < θ ≤ 90 72 72 72 64 55 47 42 37 33

Snow

Load

Exposure

Category

Roof Pitch

(Degrees)

Wind Speed (MPH)

B

C

D

0 PSF

10 PSF

B

C

D

20 PSF

B

C

D

25 PSF

B

C

D

6 of 28



110 115 120 130 140 150 160 170 180

θ < 7 72 / 72 / 72 72 / 72 / 69 72 / 72 / 63 72 / 72 / 54 72 / 72 / 46 72 / 63 / 40 72 / 55 / 35 72 / 49 / 31 72 / 43 / 27

7 < θ ≤ 27 72 / 72 / 72 72 / 72 / 72 72 / 72 / 68 72 / 72 / 58 72 / 72 / 49 72 / 67 / 43 72 / 58 / 37 72 / 51 / 33 72 / 46 / 29

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 70 / 65 / 65

45 < θ ≤ 90 72 72 72 72 72 72 70 62 55

θ < 7 72 / 72 / 53 72 / 72 / 49 72 / 71 / 45 72 / 60 / 38 72 / 51 / 32 72 / 44 / 28 72 / 39 / 24 63 / 34 / 22 56 / 30 / 19

7 < θ ≤ 27 72 / 72 / 58 72 / 72 / 52 72 / 72 / 48 72 / 63 / 41 72 / 54 / 35 72 / 47 / 30 72 / 41 / 26 70 / 36 / 23 62 / 32 / 21

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 67 / 67 66 / 58 / 58 61 / 52 / 52 55 / 46 / 46

45 < θ ≤ 90 72 72 72 72 65 56 49 44 39

θ < 7 72 / 71 / 53 72 / 71 / 49 72 / 59 / 37 72 / 50 / 32 72 / 43 / 27 69 / 37 / 23 60 / 32 / 21 53 / 29 / 18 47 / 25 / 16

7 < θ ≤ 27 72 / 72 / 48 72 / 69 / 44 72 / 63 / 40 72 / 53 / 34 72 / 45 / 29 72 / 39 / 25 67 / 34 / 22 59 / 30 / 19 52 / 27 / 17

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 70 / 65 / 65 65 / 56 / 56 59 / 49 / 49 52 / 43 / 43 46 / 38 / 38

45 < θ ≤ 90 72 72 72 64 55 47 42 37 33

θ < 7 72 / 72 / 72 72 / 72 / 69 72 / 72 / 63 72 / 72 / 54 72 / 72 / 46 72 / 63 / 40 72 / 55 / 35 72 / 49 / 31 72 / 43 / 27

7 < θ ≤ 27 72 / 72 / 72 72 / 72 / 72 72 / 72 / 68 72 / 72 / 58 72 / 72 / 49 72 / 67 / 43 72 / 58 / 37 72 / 51 / 33 72 / 46 / 29

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 71 / 71 / 71 67 / 65 / 65

45 < θ ≤ 90 72 72 72 72 72 72 70 62 55

θ < 7 72 / 72 / 53 72 / 72 / 49 72 / 71 / 45 72 / 60 / 38 72 / 51 / 32 72 / 44 / 28 72 / 39 / 24 63 / 34 / 22 56 / 30 / 19

7 < θ ≤ 27 72 / 72 / 58 72 / 72 / 52 72 / 72 / 48 72 / 63 / 41 72 / 54 / 35 72 / 47 / 30 72 / 41 / 26 70 / 36 / 23 62 / 32 / 21

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 68 / 67 / 67 63 / 58 / 58 58 / 52 / 52 54 / 46 / 46

45 < θ ≤ 90 72 72 72 72 65 56 49 44 39

θ < 7 72 / 71 / 53 72 / 71 / 49 72 / 59 / 37 72 / 50 / 32 72 / 43 / 27 69 / 37 / 23 60 / 32 / 21 53 / 29 / 18 47 / 25 / 16

7 < θ ≤ 27 72 / 72 / 48 72 / 69 / 44 72 / 63 / 40 72 / 53 / 34 72 / 45 / 29 72 / 39 / 25 67 / 34 / 22 59 / 30 / 19 52 / 27 / 17

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 66 / 65 / 65 61 / 56 / 56 57 / 49 / 49 52 / 43 / 43 46 / 38 / 38

45 < θ ≤ 90 72 72 72 64 55 47 42 37 33

θ < 7 72 / 72 / 72 72 / 72 / 69 72 / 72 / 63 72 / 72 / 54 72 / 72 / 46 72 / 63 / 40 72 / 55 / 35 72 / 49 / 31 72 / 43 / 27

7 < θ ≤ 27 72 / 72 / 72 72 / 72 / 72 72 / 72 / 68 72 / 72 / 58 72 / 72 / 49 72 / 67 / 43 72 / 58 / 37 72 / 51 / 33 71 / 46 / 29

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 71 / 71 / 71 67 / 67 / 67 63 / 63 / 63

45 < θ ≤ 90 72 72 72 72 72 72 70 62 55

θ < 7 72 / 72 / 53 72 / 72 / 49 72 / 71 / 45 72 / 60 / 38 72 / 51 / 32 72 / 44 / 28 72 / 39 / 24 63 / 34 / 22 56 / 30 / 19

7 < θ ≤ 27 72 / 72 / 58 72 / 72 / 52 72 / 72 / 48 72 / 63 / 41 72 / 54 / 35 71 / 47 / 30 68 / 41 / 26 65 / 36 / 23 62 / 32 / 21

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 69 / 69 / 69 64 / 64 / 64 60 / 58 / 58 56 / 52 / 52 52 / 46 / 46

45 < θ ≤ 90 72 72 72 72 65 56 49 44 39

θ < 7 72 / 71 / 53 72 / 71 / 49 72 / 59 / 37 72 / 50 / 32 72 / 43 / 27 69 / 37 / 23 60 / 32 / 21 53 / 29 / 18 47 / 25 / 16

7 < θ ≤ 27 72 / 72 / 48 72 / 69 / 44 72 / 63 / 40 72 / 53 / 34 71 / 45 / 29 67 / 39 / 25 64 / 34 / 22 59 / 30 / 19 52 / 27 / 17

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 68 / 68 / 68 63 / 63 / 63 58 / 56 / 56 54 / 49 / 49 50 / 43 / 43 46 / 38 / 38

45 < θ ≤ 90 72 72 72 64 55 47 42 37 33

θ < 7 59 / 59 / 59 59 / 59 / 59 59 / 59 / 59 59 / 59 / 54 59 / 59 / 46 59 / 59 / 40 59 / 55 / 35 59 / 49 / 31 59 / 43 / 27

7 < θ ≤ 27 66 / 66 / 66 66 / 66 / 66 66 / 66 / 66 66 / 66 / 58 66 / 66 / 49 66 / 66 / 43 66 / 58 / 37 64 / 51 / 33 62 / 46 / 29

27 < θ ≤ 45 62 / 62 / 62 62 / 62 / 62 62 / 62 / 62 62 / 62 / 62 62 / 62 / 62 62 / 62 / 62 62 / 62 / 62 60 / 60 / 60 57 / 57 / 57

45 < θ ≤ 90 72 72 72 72 72 72 70 62 55

θ < 7 59 / 59 / 53 59 / 59 / 49 59 / 59 / 45 59 / 59 / 38 59 / 51 / 32 59 / 44 / 28 59 / 39 / 24 59 / 34 / 22 56 / 30 / 19

7 < θ ≤ 27 66 / 66 / 58 66 / 66 / 52 66 / 66 / 48 66 / 63 / 41 64 / 54 / 35 62 / 47 / 30 60 / 41 / 26 57 / 36 / 23 55 / 32 / 21

27 < θ ≤ 45 62 / 62 / 62 62 / 62 / 62 62 / 62 / 62 62 / 62 / 62 61 / 61 / 61 58 / 58 / 58 54 / 54 / 54 51 / 51 / 51 48 / 46 / 46

45 < θ ≤ 90 72 72 72 72 65 56 49 44 39

θ < 7 59 / 59 / 53 59 / 59 / 49 59 / 59 / 37 59 / 50 / 32 59 / 43 / 27 59 / 37 / 23 59 / 32 / 21 53 / 29 / 18 47 / 25 / 16

7 < θ ≤ 27 66 / 66 / 48 66 / 66 / 44 66 / 63 / 40 64 / 53 / 34 62 / 45 / 29 59 / 39 / 25 57 / 34 / 22 54 / 30 / 19 52 / 27 / 17

27 < θ ≤ 45 62 / 62 / 62 62 / 62 / 62 62 / 62 / 62 61 / 61 / 61 57 / 57 / 57 53 / 53 / 53 50 / 49 / 49 46 / 43 / 43 43 / 38 / 38

45 < θ ≤ 90 72 72 72 64 55 47 42 37 33

30 PSF

B

C

D

35 PSF

B

C

D

Snow

Load

Exposure

Category

Roof Pitch

(Degrees)

Wind Speed (MPH)

40 PSF

B

C

D

50 PSF

B

C

D

7 of 28



110 115 120 130 140 150 160 170 180

θ < 7 50 / 50 / 50 50 / 50 / 50 50 / 50 / 50 50 / 50 / 50 50 / 50 / 46 50 / 50 / 40 50 / 50 / 35 50 / 49 / 31 50 / 43 / 27

7 < θ ≤ 27 55 / 55 / 55 55 / 55 / 55 55 / 55 / 55 55 / 55 / 55 55 / 55 / 49 55 / 55 / 43 55 / 55 / 37 55 / 51 / 33 54 / 46 / 29

27 < θ ≤ 45 53 / 53 / 53 53 / 53 / 53 53 / 53 / 53 53 / 53 / 53 53 / 53 / 53 53 / 53 / 53 53 / 53 / 53 53 / 53 / 53 52 / 52 / 52

45 < θ ≤ 90 62 62 62 62 62 62 62 62 55

θ < 7 50 / 50 / 50 50 / 50 / 49 50 / 50 / 45 50 / 50 / 38 50 / 50 / 32 50 / 44 / 28 50 / 39 / 24 50 / 34 / 22 50 / 30 / 19

7 < θ ≤ 27 55 / 55 / 55 55 / 55 / 52 55 / 55 / 48 55 / 55 / 41 55 / 54 / 35 55 / 47 / 30 53 / 41 / 26 51 / 36 / 23 49 / 32 / 21

27 < θ ≤ 45 53 / 53 / 53 53 / 53 / 53 53 / 53 / 53 53 / 53 / 53 53 / 53 / 53 53 / 53 / 53 50 / 50 / 50 47 / 47 / 47 44 / 44 / 44

45 < θ ≤ 90 62 62 62 62 62 56 49 44 39

θ < 7 50 / 50 / 50 50 / 50 / 49 50 / 50 / 37 50 / 50 / 32 50 / 43 / 27 50 / 37 / 23 50 / 32 / 21 50 / 29 / 18 47 / 25 / 16

7 < θ ≤ 27 55 / 55 / 48 55 / 55 / 44 55 / 55 / 40 55 / 53 / 34 54 / 45 / 29 52 / 39 / 25 50 / 34 / 22 49 / 30 / 19 47 / 27 / 17

27 < θ ≤ 45 53 / 53 / 53 53 / 53 / 53 53 / 53 / 53 53 / 53 / 53 52 / 52 / 52 49 / 49 / 49 46 / 46 / 46 43 / 43 / 43 40 / 38 / 38

45 < θ ≤ 90 62 62 62 62 55 47 42 37 33

θ < 7 43 / 43 / 43 43 / 43 / 43 43 / 43 / 43 43 / 43 / 43 43 / 43 / 43 43 / 43 / 40 43 / 43 / 35 43 / 43 / 31 43 / 43 / 27

7 < θ ≤ 27 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 43 48 / 48 / 37 48 / 48 / 33 48 / 46 / 29

27 < θ ≤ 45 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46

45 < θ ≤ 90 55 55 55 55 55 55 55 55 55

θ < 7 43 / 43 / 43 43 / 43 / 43 43 / 43 / 43 43 / 43 / 38 43 / 43 / 32 43 / 43 / 28 43 / 39 / 24 43 / 34 / 22 43 / 30 / 19

7 < θ ≤ 27 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 41 48 / 48 / 35 48 / 47 / 30 48 / 41 / 26 46 / 36 / 23 45 / 32 / 21

27 < θ ≤ 45 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 43 / 43 / 43 41 / 41 / 41

45 < θ ≤ 90 55 55 55 55 55 55 49 44 39

θ < 7 43 / 43 / 43 43 / 43 / 43 43 / 43 / 37 43 / 43 / 32 43 / 43 / 27 43 / 37 / 23 43 / 32 / 21 43 / 29 / 18 43 / 25 / 16

7 < θ ≤ 27 48 / 48 / 48 48 / 48 / 44 48 / 48 / 40 48 / 48 / 34 48 / 45 / 29 47 / 39 / 25 46 / 34 / 22 44 / 30 / 19 42 / 27 / 17

27 < θ ≤ 45 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 45 / 45 / 45 42 / 42 / 42 40 / 40 / 40 38 / 38 / 38

45 < θ ≤ 90 55 55 55 55 55 47 42 37 33

θ < 7 38 / 38 / 38 38 / 38 / 38 38 / 38 / 38 38 / 38 / 38 38 / 38 / 38 38 / 38 / 38 38 / 38 / 35 38 / 38 / 31 38 / 38 / 27

7 < θ ≤ 27 42 / 42 / 42 42 / 42 / 42 42 / 42 / 42 42 / 42 / 42 42 / 42 / 42 42 / 42 / 42 42 / 42 / 37 42 / 42 / 33 42 / 42 / 29

27 < θ ≤ 45 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40

45 < θ ≤ 90 49 49 49 49 49 49 49 49 49

θ < 7 38 / 38 / 38 38 / 38 / 38 38 / 38 / 38 38 / 38 / 38 38 / 38 / 32 38 / 38 / 28 38 / 38 / 24 38 / 34 / 22 38 / 30 / 19

7 < θ ≤ 27 42 / 42 / 42 42 / 42 / 42 42 / 42 / 42 42 / 42 / 41 42 / 42 / 35 42 / 42 / 30 42 / 41 / 26 42 / 36 / 23 41 / 32 / 21

27 < θ ≤ 45 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 38 / 38 / 38

45 < θ ≤ 90 49 49 49 49 49 49 49 44 39

θ < 7 38 / 38 / 38 38 / 38 / 38 38 / 38 / 37 38 / 38 / 32 38 / 38 / 27 38 / 37 / 23 38 / 32 / 21 38 / 29 / 18 38 / 25 / 16

7 < θ ≤ 27 42 / 42 / 42 42 / 42 / 42 42 / 42 / 40 42 / 42 / 34 42 / 42 / 29 42 / 39 / 25 42 / 34 / 22 40 / 30 / 19 39 / 27 / 17

27 < θ ≤ 45 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 38 / 38 / 38 35 / 35 / 35

45 < θ ≤ 90 49 49 49 49 49 47 42 37 33

θ < 7 34 / 34 / 34 34 / 34 / 34 34 / 34 / 34 34 / 34 / 34 34 / 34 / 34 34 / 34 / 34 34 / 34 / 34 34 / 34 / 31 34 / 34 / 27

7 < θ ≤ 27 38 / 38 / 38 38 / 38 / 38 38 / 38 / 38 38 / 38 / 38 38 / 38 / 38 38 / 38 / 38 38 / 38 / 37 38 / 38 / 33 38 / 38 / 29

27 < θ ≤ 45 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36

45 < θ ≤ 90 44 44 44 44 44 44 44 44 44

θ < 7 34 / 34 / 34 34 / 34 / 34 34 / 34 / 34 34 / 34 / 34 34 / 34 / 32 34 / 34 / 28 34 / 34 / 24 34 / 34 / 22 34 / 30 / 19

7 < θ ≤ 27 38 / 38 / 38 38 / 38 / 38 38 / 38 / 38 38 / 38 / 38 38 / 38 / 35 38 / 38 / 30 38 / 38 / 26 38 / 36 / 23 38 / 32 / 21

27 < θ ≤ 45 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36

45 < θ ≤ 90 44 44 44 44 44 44 44 44 39

θ < 7 34 / 34 / 34 34 / 34 / 34 34 / 34 / 34 34 / 34 / 32 34 / 34 / 27 34 / 34 / 23 34 / 32 / 21 34 / 29 / 18 34 / 25 / 16

7 < θ ≤ 27 38 / 38 / 38 38 / 38 / 38 38 / 38 / 38 38 / 38 / 34 38 / 38 / 29 38 / 38 / 25 38 / 34 / 22 37 / 30 / 19 36 / 27 / 17

27 < θ ≤ 45 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 35 / 35 / 35 33 / 33 / 33

45 < θ ≤ 90 44 44 44 44 44 44 42 37 33

60 PSF

B

C

D

70 PSF

B

C

D

80 PSF

B

C

D

90 PSF

B

C

D

Snow

Load

Exposure

Category

Roof Pitch

(Degrees)

Wind Speed (MPH)

8 of 28



110 115 120 130 140 150 160 170 180

θ < 7 72 / 72 / 62 72 / 72 / 57 72 / 72 / 52 72 / 70 / 44 72 / 60 / 37 72 / 51 / 32 72 / 45 / 28 72 / 40 / 25 65 / 35 / 22

7 < θ ≤ 27 72 / 72 / 67 72 / 72 / 61 72 / 72 / 56 72 / 72 / 47 72 / 63 / 40 72 / 54 / 35 72 / 48 / 31 72 / 42 / 27 72 / 37 / 24

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 68 / 68 72 / 60 / 60 64 / 53 / 53

45 < θ ≤ 90 72 72 72 72 72 65 57 50 45

θ < 7 72 / 72 / 46 72 / 67 / 42 72 / 72 / 38 72 / 72 / 32 72 / 61 / 28 71 / 66 / 24 62 / 72 / 21 54 / 52 / 19 48 / 56 / 16

7 < θ ≤ 27 72 / 72 / 50 72 / 71 / 45 72 / 64 / 41 72 / 55 / 35 72 / 47 / 30 72 / 40 / 26 69 / 35 / 23 61 / 31 / 20 54 / 28 / 18

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 67 / 67 70 / 58 / 58 61 / 50 / 50 54 / 44 / 44 48 / 39 / 39

45 < θ ≤ 90 72 72 72 65 56 49 43 38 33

θ < 7 72 / 63 / 39 72 / 57 / 36 72 / 52 / 33 72 / 44 / 28 70 / 38 / 24 61 / 33 / 21 53 / 29 / 18 47 / 25 / 16 41 / 22 / NA

7 < θ ≤ 27 72 / 66 / 42 72 / 60 / 39 72 / 55 / 35 72 / 47 / 30 72 / 40 / 26 67 / 35 / 22 59 / 30 / 19 52 / 27 / 17 46 / 24 / NA

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 67 / 67 69 / 57 / 57 60 / 49 / 49 52 / 43 / 43 46 / 38 / 38 41 / 34 / 34

45 < θ ≤ 90 72 72 66 56 48 42 37 32 29

θ < 7 72 / 72 / 62 72 / 72 / 57 72 / 72 / 52 72 / 70 / 44 72 / 60 / 37 72 / 51 / 32 72 / 45 / 28 72 / 40 / 25 65 / 35 / 22

7 < θ ≤ 27 72 / 72 / 67 72 / 72 / 61 72 / 72 / 56 72 / 72 / 47 72 / 63 / 40 72 / 54 / 35 72 / 48 / 31 72 / 42 / 27 72 / 37 / 24

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 68 / 68 72 / 60 / 60 64 / 53 / 53

45 < θ ≤ 90 72 72 72 72 72 65 57 50 45

θ < 7 72 / 72 / 46 72 / 67 / 42 72 / 61 / 38 72 / 52 / 32 72 / 44 / 28 71 / 38 / 24 62 / 33 / 21 54 / 29 / 19 48 / 26 / 16

7 < θ ≤ 27 72 / 72 / 50 72 / 71 / 45 72 / 64 / 41 72 / 55 / 35 72 / 47 / 30 72 / 40 / 26 69 / 35 / 23 61 / 31 / 20 54 / 28 / 18

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 67 / 67 70 / 58 / 58 61 / 50 / 50 54 / 44 / 44 48 / 39 / 39

45 < θ ≤ 90 72 72 72 65 56 49 43 38 33

θ < 7 72 / 63 / 39 72 / 57 / 36 72 / 52 / 33 72 / 44 / 28 70 / 38 / 24 61 / 33 / 21 53 / 29 / 18 47 / 25 / 16 41 / 22 / NA

7 < θ ≤ 27 72 / 66 / 42 72 / 60 / 39 72 / 55 / 35 72 / 47 / 30 72 / 40 / 26 67 / 35 / 22 59 / 30 / 19 52 / 27 / 17 46 / 24 / NA

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 67 / 67 69 / 57 / 57 60 / 49 / 49 52 / 43 / 43 46 / 38 / 38 41 / 34 / 34

45 < θ ≤ 90 72 72 66 56 48 42 37 32 29

θ < 7 72 / 72 / 62 72 / 72 / 57 72 / 72 / 52 72 / 70 / 44 72 / 60 / 37 72 / 51 / 32 72 / 45 / 28 72 / 40 / 25 65 / 35 / 22

7 < θ ≤ 27 72 / 72 / 67 72 / 72 / 61 72 / 72 / 56 72 / 72 / 47 72 / 63 / 40 72 / 54 / 35 72 / 48 / 31 72 / 42 / 27 72 / 37 / 24

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 68 / 68 72 / 60 / 60 64 / 53 / 53

45 < θ ≤ 90 72 72 72 72 72 65 57 50 45

θ < 7 72 / 72 / 46 72 / 67 / 42 72 / 61 / 38 72 / 52 / 32 72 / 44 / 28 71 / 38 / 24 62 / 33 / 21 54 / 29 / 19 48 / 26 / 16

7 < θ ≤ 27 72 / 72 / 50 72 / 71 / 45 72 / 64 / 41 72 / 55 / 35 72 / 47 / 30 72 / 40 / 26 69 / 35 / 23 61 / 31 / 20 54 / 28 / 18

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 67 / 67 70 / 58 / 58 61 / 50 / 50 54 / 44 / 44 48 / 39 / 39

45 < θ ≤ 90 72 72 72 65 56 49 43 38 33

θ < 7 72 / 63 / 39 72 / 57 / 36 72 / 52 / 33 72 / 44 / 28 70 / 38 / 24 61 / 33 / 21 53 / 29 / 18 47 / 25 / 16 41 / 22 / NA

7 < θ ≤ 27 72 / 66 / 42 72 / 60 / 39 72 / 55 / 35 72 / 47 / 30 72 / 40 / 26 67 / 35 / 22 59 / 30 / 19 52 / 27 / 17 46 / 24 / NA

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 67 / 67 69 / 57 / 57 60 / 49 / 49 52 / 43 / 43 46 / 38 / 38 41 / 34 / 34

45 < θ ≤ 90 72 72 66 56 48 42 37 32 29

θ < 7 72 / 72 / 62 72 / 72 / 57 72 / 72 / 52 72 / 70 / 44 72 / 60 / 37 72 / 51 / 32 72 / 45 / 28 72 / 40 / 25 65 / 35 / 22

7 < θ ≤ 27 72 / 72 / 67 72 / 72 / 61 72 / 72 / 56 72 / 72 / 47 72 / 63 / 40 72 / 54 / 35 72 / 48 / 31 72 / 42 / 27 72 / 37 / 24

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 68 / 68 71 / 60 / 60 64 / 53 / 53

45 < θ ≤ 90 72 72 72 72 72 65 57 50 45

θ < 7 72 / 72 / 46 72 / 67 / 42 72 / 61 / 38 72 / 52 / 32 72 / 44 / 28 71 / 38 / 24 62 / 33 / 21 54 / 29 / 19 48 / 26 / 16

7 < θ ≤ 27 72 / 72 / 50 72 / 71 / 45 72 / 64 / 41 72 / 55 / 35 72 / 47 / 30 72 / 40 / 26 69 / 35 / 23 61 / 31 / 20 54 / 28 / 18

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 67 / 67 70 / 58 / 58 61 / 50 / 50 54 / 44 / 44 48 / 39 / 39

45 < θ ≤ 90 72 72 72 65 56 49 43 38 33

θ < 7 72 / 63 / 39 72 / 57 / 36 72 / 52 / 33 72 / 44 / 28 70 / 38 / 24 61 / 33 / 21 53 / 29 / 18 47 / 25 / 16 41 / 22 / NA

7 < θ ≤ 27 72 / 66 / 42 72 / 60 / 39 72 / 55 / 35 72 / 47 / 30 72 / 40 / 26 67 / 35 / 22 59 / 30 / 19 52 / 27 / 17 46 / 24 / NA

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 67 / 67 69 / 57 / 57 60 / 49 / 49 52 / 43 / 43 46 / 38 / 38 41 / 34 / 34

45 < θ ≤ 90 72 72 66 56 48 42 37 32 29

Snow

Load

Exposure

Category

Roof Pitch

(Degrees)

Wind Speed (MPH)

0 PSF

B

C

D

10 PSF

B

C

D

20 PSF

B

C

D

25 PSF

B

C

D

9 of 28



110 115 120 130 140 150 160 170 180

θ < 7 72 / 72 / 62 72 / 72 / 57 72 / 72 / 52 72 / 70 / 44 72 / 60 / 37 72 / 51 / 32 72 / 45 / 28 72 / 40 / 25 65 / 35 / 22

7 < θ ≤ 27 72 / 72 / 67 72 / 72 / 61 72 / 72 / 56 72 / 72 / 47 72 / 63 / 40 72 / 54 / 35 72 / 48 / 31 72 / 42 / 27 72 / 37 / 24

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 68 / 68 67 / 60 / 60 63 / 53 / 53

45 < θ ≤ 90 72 72 72 72 72 65 57 50 45

θ < 7 72 / 72 / 46 72 / 67 / 42 72 / 61 / 38 72 / 52 / 32 72 / 44 / 28 71 / 38 / 24 62 / 33 / 21 54 / 29 / 19 48 / 26 / 16

7 < θ ≤ 27 72 / 72 / 50 72 / 71 / 45 72 / 64 / 41 72 / 55 / 35 72 / 47 / 30 72 / 40 / 26 69 / 35 / 23 61 / 31 / 20 54 / 28 / 18

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 71 / 67 / 67 66 / 58 / 58 61 / 50 / 50 54 / 44 / 44 48 / 39 / 39

45 < θ ≤ 90 72 72 72 65 56 49 43 38 33

θ < 7 72 / 63 / 39 72 / 57 / 36 72 / 52 / 33 72 / 44 / 28 70 / 38 / 24 61 / 33 / 21 53 / 29 / 18 47 / 25 / 16 41 / 22 / NA

7 < θ ≤ 27 72 / 66 / 42 72 / 60 / 39 72 / 55 / 35 72 / 47 / 30 72 / 40 / 26 67 / 35 / 22 59 / 30 / 19 52 / 27 / 17 46 / 24 / NA

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 71 / 67 / 67 65 / 57 / 57 60 / 49 / 49 52 / 43 / 43 46 / 38 / 38 46 / 38 / 38

45 < θ ≤ 90 72 72 66 56 48 42 37 32 29

θ < 7 72 / 72 / 62 72 / 72 / 57 72 / 72 / 52 72 / 70 / 44 72 / 60 / 37 72 / 51 / 32 72 / 45 / 28 72 / 40 / 25 65 / 35 / 22

7 < θ ≤ 27 72 / 72 / 67 72 / 72 / 61 72 / 72 / 56 72 / 72 / 47 72 / 63 / 40 72 / 54 / 35 72 / 48 / 31 72 / 42 / 27 71 / 37 / 24

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 68 / 68 / 68 64 / 60 / 60 59 / 53 / 53

45 < θ ≤ 90 72 72 72 72 72 65 57 50 45

θ < 7 72 / 72 / 46 72 / 67 / 42 72 / 61 / 38 72 / 52 / 32 72 / 44 / 28 71 / 38 / 24 62 / 33 / 21 54 / 29 / 19 48 / 26 / 16

7 < θ ≤ 27 72 / 72 / 50 72 / 71 / 45 72 / 64 / 41 72 / 55 / 35 72 / 47 / 30 72 / 40 / 26 69 / 35 / 23 61 / 31 / 20 54 / 28 / 18

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 67 / 67 / 67 62 / 58 / 58 58 / 50 / 50 53 / 44 / 44 48 / 39 / 39

45 < θ ≤ 90 72 72 72 65 56 49 43 38 33

θ < 7 72 / 63 / 39 72 / 57 / 36 72 / 52 / 33 72 / 44 / 28 70 / 38 / 24 61 / 33 / 21 53 / 29 / 18 47 / 25 / 16 41 / 22 / NA

7 < θ ≤ 27 72 / 66 / 42 72 / 60 / 39 72 / 55 / 35 72 / 47 / 30 72 / 40 / 26 67 / 35 / 22 59 / 30 / 19 52 / 27 / 17 46 / 24 / NA

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 67 / 67 / 67 62 / 57 / 57 57 / 49 / 49 52 / 43 / 43 46 / 38 / 38 41 / 34 / 34

45 < θ ≤ 90 72 72 66 56 48 42 37 32 29

θ < 7 72 / 72 / 62 72 / 72 / 57 72 / 72 / 52 72 / 70 / 44 72 / 60 / 37 72 / 51 / 32 72 / 45 / 28 72 / 40 / 25 65 / 35 / 22

7 < θ ≤ 27 72 / 72 / 67 72 / 72 / 61 72 / 72 / 56 72 / 72 / 47 72 / 63 / 40 72 / 54 / 35 72 / 48 / 31 69 / 42 / 27 66 / 37 / 24

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 69 / 69 / 69 64 / 64 / 64 60 / 60 / 60 57 / 53 / 53

45 < θ ≤ 90 72 72 72 72 72 65 57 50 45

θ < 7 72 / 72 / 46 72 / 67 / 42 72 / 61 / 38 72 / 52 / 32 72 / 44 / 28 71 / 38 / 24 62 / 33 / 21 54 / 29 / 19 48 / 26 / 16

7 < θ ≤ 27 72 / 72 / 50 72 / 71 / 45 72 / 64 / 41 72 / 55 / 35 71 / 47 / 30 68 / 40 / 26 65 / 35 / 23 61 / 31 / 20 54 / 28 / 18

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 72 / 72 / 72 69 / 69 / 69 64 / 64 / 64 59 / 58 / 58 55 / 50 / 50 51 / 44 / 44 48 / 39 / 39

45 < θ ≤ 90 72 72 72 65 56 49 43 38 33

θ < 7 72 / 63 / 39 72 / 57 / 36 72 / 52 / 33 72 / 44 / 28 70 / 38 / 24 61 / 33 / 21 53 / 29 / 18 47 / 25 / 16 41 / 22 / NA

7 < θ ≤ 27 72 / 66 / 42 72 / 60 / 39 72 / 55 / 35 71 / 47 / 30 68 / 40 / 26 64 / 35 / 22 59 / 30 / 19 52 / 27 / 17 46 / 24 / NA

27 < θ ≤ 45 72 / 72 / 72 72 / 72 / 72 69 / 69 / 69 64 / 64 / 64 59 / 57 / 57 54 / 49 / 49 50 / 43 / 43 46 / 38 / 38 41 / 34 / 34

45 < θ ≤ 90 72 72 66 56 48 42 37 32 29

θ < 7 59 / 59 / 59 59 / 59 / 57 59 / 59 / 52 59 / 59 / 44 59 / 59 / 37 59 / 51 / 32 59 / 45 / 28 59 / 40 / 25 59 / 35 / 22

7 < θ ≤ 27 66 / 66 / 66 66 / 66 / 61 66 / 66 / 56 66 / 66 / 47 66 / 63 / 40 64 / 54 / 35 59 / 48 / 31 60 / 42 / 27 58 / 37 / 24

27 < θ ≤ 45 62 / 62 / 62 62 / 62 / 62 62 / 62 / 62 62 / 62 / 62 62 / 62 / 62 62 / 62 / 62 58 / 58 / 58 55 / 55 / 55 52 / 52 / 52

45 < θ ≤ 90 72 72 72 72 72 65 57 50 45

θ < 7 59 / 59 / 46 59 / 59 / 42 59 / 59 / 38 59 / 52 / 32 59 / 44 / 28 59 / 38 / 24 59 / 33 / 21 54 / 29 / 19 48 / 26 / 16

7 < θ ≤ 27 66 / 66 / 50 66 / 66 / 45 66 / 64 / 41 64 / 55 / 35 62 / 47 / 30 60 / 40 / 26 57 / 35 / 23 55 / 31 / 20 52 / 28 / 18

27 < θ ≤ 45 62 / 62 / 62 62 / 62 / 62 62 / 62 / 62 62 / 62 / 62 58 / 58 / 58 54 / 54 / 54 50 / 50 / 50 47 / 44 / 44 44 / 39 / 39

45 < θ ≤ 90 72 72 72 65 56 49 43 38 33

θ < 7 59 / 59 / 39 59 / 57 / 36 59 / 52 / 33 59 / 44 / 28 59 / 38 / 24 59 / 33 / 21 53 / 29 / 18 47 / 25 / 16 41 / 22 / NA

7 < θ ≤ 27 66 / 66 / 42 66 / 60 / 39 65 / 55 / 35 62 / 47 / 30 59 / 40 / 26 57 / 35 / 22 54 / 30 / 19 52 / 27 / 17 46 / 24 / NA

27 < θ ≤ 45 62 / 62 / 62 62 / 62 / 62 62 / 62 / 62 58 / 58 / 58 54 / 54 / 54 50 / 49 / 49 46 / 43 / 43 43 / 38 / 38 40 / 34 / 34

45 < θ ≤ 90 72 72 66 56 48 42 37 32 29

Snow

Load

Exposure

Category

Roof Pitch

(Degrees)

Wind Speed (MPH)

30 PSF

B

C

D

35 PSF

B

C

D

40 PSF

B

C

D

50 PSF

B

C

D

10 of 28



110 115 120 130 140 150 160 170 180

θ < 7 50 / 50 / 50 50 / 50 / 50 50 / 50 / 50 50 / 50 / 44 50 / 50 / 37 50 / 50 / 32 50 / 45 / 28 50 / 40 / 25 50 / 35 / 22

7 < θ ≤ 27 55 / 55 / 55 55 / 55 / 55 55 / 55 / 55 55 / 55 / 47 55 / 55 / 40 55 / 54 / 35 50 / 48 / 31 53 / 42 / 27 52 / 37 / 24

27 < θ ≤ 45 53 / 53 / 53 53 / 53 / 53 53 / 53 / 53 53 / 53 / 53 53 / 53 / 53 53 / 53 / 53 53 / 53 / 53 50 / 50 / 50 48 / 48 / 48

45 < θ ≤ 90 62 62 62 62 62 62 57 50 45

θ < 7 50 / 50 / 46 50 / 50 / 42 50 / 50 / 38 50 / 50 / 32 50 / 44 / 28 50 / 38 / 24 50 / 33 / 21 50 / 29 / 19 48 / 26 / 16

7 < θ ≤ 27 55 / 55 / 50 55 / 55 / 45 55 / 55 / 41 55 / 55 / 35 55 / 47 / 30 53 / 40 / 26 51 / 35 / 23 49 / 31 / 20 47 / 28 / 18

27 < θ ≤ 45 53 / 53 / 53 53 / 53 / 53 53 / 53 / 53 53 / 53 / 53 53 / 53 / 53 49 / 49 / 49 46 / 46 / 46 44 / 44 / 44 41 / 39 / 39

45 < θ ≤ 90 62 62 62 62 56 49 43 38 33

θ < 7 50 / 50 / 39 50 / 50 / 36 50 / 50 / 33 50 / 44 / 28 50 / 38 / 24 50 / 33 / 21 50 / 29 / 18 47 / 25 / 16 41 / 22 / NA

7 < θ ≤ 27 55 / 55 / 42 55 / 55 / 39 55 / 55 / 35 55 / 47 / 30 53 / 40 / 26 51 / 35 / 22 49 / 30 / 19 47 / 27 / 17 45 / 24 / NA

27 < θ ≤ 45 53 / 53 / 53 53 / 53 / 53 53 / 53 / 53 53 / 53 / 53 49 / 49 / 49 46 / 46 / 46 43 / 43 / 43 40 / 38 / 38 38 / 34 / 34

45 < θ ≤ 90 62 62 62 56 48 42 37 32 29

θ < 7 43 / 43 / 43 43 / 43 / 43 43 / 43 / 43 43 / 43 / 43 43 / 43 / 37 43 / 43 / 32 43 / 43 / 28 43 / 40 / 25 43 / 35 / 22

7 < θ ≤ 27 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 47 48 / 48 / 40 48 / 48 / 35 48 / 48 / 31 48 / 42 / 27 47 / 37 / 24

27 < θ ≤ 45 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 44 / 44 / 44

45 < θ ≤ 90 55 55 55 55 55 55 55 50 45

θ < 7 43 / 43 / 43 43 / 43 / 42 43 / 43 / 38 43 / 43 / 32 43 / 43 / 28 43 / 38 / 24 43 / 33 / 21 43 / 29 / 19 43 / 26 / 16

7 < θ ≤ 27 48 / 48 / 48 48 / 48 / 45 48 / 48 / 41 48 / 48 / 35 48 / 47 / 30 47 / 40 / 26 46 / 35 / 23 44 / 31 / 20 43 / 28 / 18

27 < θ ≤ 45 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 43 / 43 / 43 41 / 41 / 41 38 / 38 / 38

45 < θ ≤ 90 55 55 55 55 55 49 43 38 33

θ < 7 43 / 43 / 39 43 / 43 / 36 43 / 43 / 33 43 / 43 / 28 43 / 38 / 24 43 / 33 / 21 43 / 29 / 18 43 / 25 / 16 41 / 22 / NA

7 < θ ≤ 27 48 / 48 / 42 48 / 48 / 39 48 / 48 / 35 48 / 47 / 30 47 / 40 / 26 46 / 35 / 22 44 / 30 / 19 42 / 27 / 17 41 / 24 / NA

27 < θ ≤ 45 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 46 / 46 / 46 45 / 45 / 45 43 / 43 / 43 40 / 40 / 40 38 / 38 / 38 35 / 34 / 34

45 < θ ≤ 90 55 55 55 55 48 42 37 32 29

θ < 7 38 / 38 / 38 38 / 38 / 38 38 / 38 / 38 38 / 38 / 38 38 / 38 / 37 38 / 38 / 32 38 / 38 / 28 38 / 38 / 25 38 / 35 / 22

7 < θ ≤ 27 42 / 42 / 42 42 / 42 / 42 42 / 42 / 42 42 / 42 / 42 42 / 42 / 40 42 / 42 / 35 42 / 42 / 31 42 / 42 / 27 42 / 37 / 24

27 < θ ≤ 45 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40

45 < θ ≤ 90 49 49 49 49 49 49 49 49 45

θ < 7 38 / 38 / 38 38 / 38 / 38 38 / 38 / 38 38 / 38 / 32 38 / 38 / 28 38 / 38 / 24 38 / 33 / 21 38 / 29 / 19 38 / 26 / 16

7 < θ ≤ 27 42 / 42 / 42 42 / 42 / 42 42 / 42 / 41 42 / 42 / 35 42 / 42 / 30 42 / 40 / 26 42 / 35 / 23 41 / 31 / 20 39 / 28 / 18

27 < θ ≤ 45 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 38 / 38 / 38 36 / 36 / 36

45 < θ ≤ 90 49 49 49 49 49 49 43 38 33

θ < 7 38 / 38 / 38 38 / 38 / 36 38 / 38 / 33 38 / 38 / 28 38 / 38 / 24 38 / 33 / 21 38 / 29 / 18 38 / 25 / 16 38 / 22 / NA

7 < θ ≤ 27 42 / 42 / 42 42 / 42 / 39 42 / 42 / 35 42 / 42 / 30 42 / 40 / 26 42 / 35 / 22 40 / 30 / 19 39 / 27 / 17 37 / 24 / NA

27 < θ ≤ 45 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 40 / 40 / 40 38 / 38 / 38 35 / 35 / 35 33 / 33 / 33

45 < θ ≤ 90 49 49 49 49 48 42 37 32 29

θ < 7 34 / 34 / 34 34 / 34 / 34 34 / 34 / 34 34 / 34 / 34 34 / 34 / 34 34 / 34 / 32 34 / 34 / 28 34 / 34 / 25 34 / 34 / 22

7 < θ ≤ 27 38 / 38 / 38 38 / 38 / 38 38 / 38 / 38 38 / 38 / 38 38 / 38 / 38 38 / 38 / 35 38 / 38 / 31 38 / 38 / 27 38 / 37 / 24

27 < θ ≤ 45 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36

45 < θ ≤ 90 44 44 44 44 44 44 44 44 44

θ < 7 34 / 34 / 34 34 / 34 / 34 34 / 34 / 34 34 / 34 / 32 34 / 34 / 28 34 / 34 / 24 34 / 33 / 21 34 / 29 / 19 34 / 26 / 16

7 < θ ≤ 27 38 / 38 / 38 38 / 38 / 38 38 / 38 / 38 38 / 38 / 35 38 / 38 / 30 38 / 38 / 26 38 / 35 / 23 37 / 31 / 20 36 / 28 / 18

27 < θ ≤ 45 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 34 / 34 / 34

45 < θ ≤ 90 44 44 44 44 44 44 43 38 33

θ < 7 34 / 34 / 34 34 / 34 / 34 34 / 34 / 33 34 / 34 / 28 34 / 34 / 24 34 / 33 / 21 34 / 29 / 18 34 / 25 / 16 34 / 22 / NA

7 < θ ≤ 27 38 / 38 / 38 38 / 38 / 38 38 / 38 / 35 38 / 38 / 30 38 / 38 / 26 38 / 35 / 22 37 / 30 / 19 36 / 27 / 17 35 / 24 / NA

27 < θ ≤ 45 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 36 / 36 / 36 35 / 35 / 35 33 / 33 / 33 32 / 32 / 32

45 < θ ≤ 90 44 44 44 44 44 42 37 32 29

Snow

Load

Exposure

Category

Roof Pitch

(Degrees)

Wind Speed (MPH)

60 PSF

B

C

D

90 PSF

B

C

D

70 PSF

B

C

D

80 PSF

B

C

D

11 of 28


[Portrait] [0-30 ft]

110 115 120 130 140 150 160 170 180

θ < 7 48 / 48 / 45 48 / 48 / 41 48 / 48 / 38 48 / 48 / 32 48 / 43 / 27 48 / 37 / 23 48 / 33 / 20 48 / 29 / 18 48 / 25 / 16

7 < θ ≤ 27 48 / 48 / 48 48 / 48 / 44 48 / 48 / 40 48 / 48 / 34 48 / 46 / 29 48 / 40 / 25 48 / 34 / 22 48 / 30 / 19 48 / 27 / 17

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 43 / 43 47 / 38 / 38

45 < θ ≤ 90 48 48 48 48 48 47 41 37 32

θ < 7 48 / 48 / 32 48 / 46 / 29 48 / 42 / 26 48 / 35 / 22 48 / 30 / 19 48 / 26 / 16 43 / 23 / NA 37 / 20 / NA 33 / 18 / NA

7 < θ ≤ 27 48 / 48 / 34 48 / 48 / 31 48 / 44 / 28 48 / 37 / 24 48 / 32 / 21 48 / 28 / 18 47 / 24 / NA 42 / 21 / NA 37 / 19 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 46 / 46 48 / 40 / 40 42 / 35 / 35 37 / 30 / 30 33 / 27 / 27

45 < θ ≤ 90 48 48 48 45 39 33 29 26 23

θ < 7 48 / 42 / 32 48 / 42 / 29 48 / 35 / 22 48 / 30 / 19 47 / 25 / 16 41 / 22 / NA 36 / 19 / NA 31 / 17 / NA 28 / NA / NA

7 < θ ≤ 27 48 / 45 / 29 48 / 41 / 26 48 / 37 / 24 48 / 31 / 20 48 / 27 / 17 45 / 23 / NA 40 / 20 / NA 35 / 18 / NA 31 / 16 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 45 / 45 47 / 38 / 38 40 / 33 / 33 35 / 29 / 29 31 / 26 / 26 27 / 23 / 23

45 < θ ≤ 90 48 48 45 38 32 28 25 22 19

θ < 7 48 / 48 / 45 48 / 48 / 41 48 / 48 / 38 48 / 48 / 32 48 / 43 / 27 48 / 37 / 23 48 / 33 / 20 48 / 29 / 18 48 / 25 / 16

7 < θ ≤ 27 48 / 48 / 48 48 / 48 / 44 48 / 48 / 40 48 / 48 / 34 48 / 46 / 29 48 / 40 / 25 48 / 34 / 22 48 / 30 / 19 48 / 27 / 17

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 43 / 43 47 / 38 / 38

45 < θ ≤ 90 48 48 48 48 48 47 41 37 32

θ < 7 48 / 48 / 32 48 / 46 / 29 48 / 42 / 26 48 / 35 / 22 48 / 30 / 19 48 / 26 / 16 43 / 23 / NA 37 / 20 / NA 33 / 18 / NA

7 < θ ≤ 27 48 / 48 / 34 48 / 48 / 31 48 / 44 / 28 48 / 37 / 24 48 / 32 / 21 48 / 28 / 18 47 / 24 / NA 42 / 21 / NA 37 / 19 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 46 / 46 48 / 40 / 40 42 / 35 / 35 37 / 30 / 30 33 / 27 / 27

45 < θ ≤ 90 48 48 48 45 39 33 29 26 23

θ < 7 48 / 42 / 32 48 / 42 / 29 48 / 35 / 22 48 / 30 / 19 47 / 25 / 16 41 / 22 / NA 36 / 19 / NA 31 / 17 / NA 28 / NA / NA

7 < θ ≤ 27 48 / 45 / 29 48 / 41 / 26 48 / 37 / 24 48 / 31 / 20 48 / 27 / 17 45 / 23 / NA 40 / 20 / NA 35 / 18 / NA 31 / 16 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 45 / 45 47 / 38 / 38 40 / 33 / 33 35 / 29 / 29 31 / 26 / 26 27 / 23 / 23

45 < θ ≤ 90 48 48 45 38 32 28 25 22 19

θ < 7 48 / 48 / 45 48 / 48 / 41 48 / 48 / 38 48 / 48 / 32 48 / 43 / 27 48 / 37 / 23 48 / 33 / 20 48 / 29 / 18 48 / 25 / 16

7 < θ ≤ 27 48 / 48 / 48 48 / 48 / 44 48 / 48 / 40 48 / 48 / 34 48 / 46 / 29 48 / 40 / 25 48 / 34 / 22 48 / 30 / 19 48 / 27 / 17

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 43 / 43 47 / 38 / 38

45 < θ ≤ 90 48 48 48 48 48 47 41 37 32

θ < 7 48 / 48 / 32 48 / 46 / 29 48 / 42 / 26 48 / 35 / 22 48 / 30 / 19 48 / 26 / 16 43 / 23 / NA 37 / 20 / NA 33 / 18 / NA

7 < θ ≤ 27 48 / 48 / 34 48 / 48 / 31 48 / 44 / 28 48 / 37 / 24 48 / 32 / 21 48 / 28 / 18 47 / 24 / NA 42 / 21 / NA 37 / 19 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 46 / 46 48 / 40 / 40 42 / 35 / 35 37 / 30 / 30 33 / 27 / 27

45 < θ ≤ 90 48 48 48 45 39 33 29 26 23

θ < 7 48 / 42 / 32 48 / 42 / 29 48 / 35 / 22 48 / 30 / 19 47 / 25 / 16 41 / 22 / NA 36 / 19 / NA 31 / 17 / NA 28 / NA / NA

7 < θ ≤ 27 48 / 45 / 29 48 / 41 / 26 48 / 37 / 24 48 / 31 / 20 48 / 27 / 17 45 / 23 / NA 40 / 20 / NA 35 / 18 / NA 31 / 16 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 45 / 45 47 / 38 / 38 40 / 33 / 33 35 / 29 / 29 31 / 26 / 26 27 / 23 / 23

45 < θ ≤ 90 48 48 45 38 32 28 25 22 19

θ < 7 48 / 48 / 45 48 / 48 / 41 48 / 48 / 38 48 / 48 / 32 48 / 43 / 27 48 / 37 / 23 48 / 33 / 20 48 / 29 / 18 48 / 25 / 16

7 < θ ≤ 27 48 / 48 / 48 48 / 48 / 44 48 / 48 / 40 48 / 48 / 34 48 / 46 / 29 48 / 40 / 25 48 / 34 / 22 48 / 30 / 19 48 / 27 / 17

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 43 / 43 44 / 38 / 38

45 < θ ≤ 90 48 48 48 48 48 47 41 37 32

θ < 7 48 / 48 / 32 48 / 46 / 29 48 / 42 / 26 48 / 35 / 22 48 / 30 / 19 48 / 26 / 16 43 / 23 / NA 37 / 20 / NA 33 / 18 / NA

7 < θ ≤ 27 48 / 48 / 34 48 / 48 / 31 48 / 44 / 28 48 / 37 / 24 48 / 32 / 21 48 / 28 / 18 47 / 24 / NA 42 / 21 / NA 37 / 19 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 46 / 46 45 / 40 / 40 42 / 35 / 35 37 / 30 / 30 33 / 27 / 27

45 < θ ≤ 90 48 48 48 45 39 33 29 26 23

θ < 7 48 / 42 / 32 48 / 42 / 29 48 / 35 / 22 48 / 30 / 19 47 / 25 / 16 41 / 22 / NA 36 / 19 / NA 31 / 17 / NA 28 / NA / NA

7 < θ ≤ 27 48 / 45 / 29 48 / 41 / 26 48 / 37 / 24 48 / 31 / 20 48 / 27 / 17 45 / 23 / NA 40 / 20 / NA 35 / 18 / NA 31 / 16 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 45 / 45 44 / 38 / 38 40 / 33 / 33 35 / 29 / 29 31 / 26 / 26 27 / 23 / 23

45 < θ ≤ 90 48 48 45 38 32 28 25 22 19

Snow

Load

Exposure

Category

Roof Pitch

(Degrees)

Wind Speed (MPH)

0 PSF

B

C

D

10 PSF

B

C

D

20 PSF

B

C

D

25 PSF

B

C

D

12 of 28



110 115 120 130 140 150 160 170 180

θ < 7 48 / 48 / 45 48 / 48 / 41 48 / 48 / 38 48 / 48 / 32 48 / 43 / 27 48 / 37 / 23 48 / 33 / 20 48 / 29 / 18 48 / 25 / 16

7 < θ ≤ 27 48 / 48 / 48 48 / 48 / 44 48 / 48 / 40 48 / 48 / 34 48 / 46 / 29 48 / 40 / 25 48 / 34 / 22 48 / 30 / 19 48 / 27 / 17

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 45 / 43 / 43 42 / 38 / 38

45 < θ ≤ 90 48 48 48 48 48 47 41 37 32

θ < 7 48 / 48 / 32 48 / 46 / 29 48 / 42 / 26 48 / 35 / 22 48 / 30 / 19 48 / 26 / 16 43 / 23 / NA 37 / 20 / NA 33 / 18 / NA

7 < θ ≤ 27 48 / 48 / 34 48 / 48 / 31 48 / 44 / 28 48 / 37 / 24 48 / 32 / 21 48 / 28 / 18 47 / 24 / NA 42 / 21 / NA 37 / 19 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 46 / 46 / 46 42 / 40 / 40 39 / 35 / 35 36 / 30 / 30 33 / 27 / 27

45 < θ ≤ 90 48 48 48 45 39 33 29 26 23

θ < 7 48 / 42 / 32 48 / 42 / 29 48 / 35 / 22 48 / 30 / 19 47 / 25 / 16 41 / 22 / NA 36 / 19 / NA 31 / 17 / NA 28 / NA / NA

7 < θ ≤ 27 48 / 45 / 29 48 / 41 / 26 48 / 37 / 24 48 / 31 / 20 48 / 27 / 17 45 / 23 / NA 40 / 20 / NA 35 / 18 / NA 31 / 16 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 45 / 45 / 45 42 / 38 / 38 38 / 33 / 33 35 / 29 / 29 31 / 26 / 26 27 / 23 / 23

45 < θ ≤ 90 48 48 45 38 32 28 25 22 19

θ < 7 48 / 48 / 45 48 / 48 / 41 48 / 48 / 38 48 / 48 / 32 48 / 43 / 27 48 / 37 / 23 48 / 33 / 20 48 / 29 / 18 48 / 25 / 16

7 < θ ≤ 27 48 / 48 / 48 48 / 48 / 44 48 / 48 / 40 48 / 48 / 34 48 / 46 / 29 48 / 40 / 25 48 / 34 / 22 47 / 30 / 19 45 / 27 / 17

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 45 / 45 / 45 42 / 42 / 42 39 / 38 / 38

45 < θ ≤ 90 48 48 48 48 48 47 41 37 32

θ < 7 48 / 48 / 32 48 / 46 / 29 48 / 42 / 26 48 / 35 / 22 48 / 30 / 19 48 / 26 / 16 43 / 23 / NA 37 / 20 / NA 33 / 18 / NA

7 < θ ≤ 27 48 / 48 / 34 48 / 48 / 31 48 / 44 / 28 48 / 37 / 24 48 / 32 / 21 46 / 28 / 18 44 / 24 / NA 42 / 21 / NA 37 / 19 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 46 / 46 / 46 43 / 43 / 43 40 / 40 / 40 37 / 35 / 35 35 / 30 / 30 32 / 27 / 27

45 < θ ≤ 90 48 48 48 45 39 33 29 26 23

θ < 7 48 / 42 / 32 48 / 42 / 29 48 / 35 / 22 48 / 30 / 19 47 / 25 / 16 41 / 22 / NA 36 / 19 / NA 31 / 17 / NA 28 / NA / NA

7 < θ ≤ 27 48 / 45 / 29 48 / 41 / 26 48 / 37 / 24 48 / 31 / 20 45 / 27 / 17 43 / 23 / NA 40 / 20 / NA 35 / 18 / NA 31 / 16 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 46 / 46 / 46 43 / 43 / 43 39 / 38 / 38 36 / 33 / 33 34 / 29 / 29 31 / 26 / 26 27 / 23 / 23

45 < θ ≤ 90 48 48 45 38 32 28 25 22 19

θ < 7 43 / 43 / 43 43 / 43 / 41 43 / 43 / 38 43 / 43 / 32 43 / 43 / 27 43 / 37 / 23 43 / 33 / 20 43 / 29 / 18 43 / 25 / 16

7 < θ ≤ 27 48 / 48 / 48 48 / 48 / 44 48 / 48 / 40 48 / 48 / 34 48 / 46 / 29 47 / 40 / 25 45 / 34 / 22 44 / 30 / 19 42 / 27 / 17

27 < θ ≤ 45 45 / 45 / 45 45 / 45 / 45 45 / 45 / 45 45 / 45 / 45 45 / 45 / 45 45 / 45 / 45 42 / 42 / 42 40 / 40 / 40 37 / 37 / 37

45 < θ ≤ 90 48 48 48 48 48 47 41 37 32

θ < 7 43 / 43 / 32 43 / 43 / 29 43 / 42 / 26 43 / 35 / 22 43 / 30 / 19 43 / 26 / 16 43 / 23 / NA 37 / 20 / NA 33 / 18 / NA

7 < θ ≤ 27 48 / 48 / 34 48 / 48 / 31 48 / 44 / 28 46 / 37 / 24 44 / 32 / 21 42 / 28 / 18 41 / 24 / NA 39 / 21 / NA 37 / 19 / NA

27 < θ ≤ 45 45 / 45 / 45 45 / 45 / 45 45 / 45 / 45 44 / 44 / 44 41 / 41 / 41 38 / 38 / 38 35 / 35 / 35 33 / 30 / 30 31 / 27 / 27

45 < θ ≤ 90 48 48 48 45 39 33 29 26 23

θ < 7 43 / 42 / 32 43 / 42 / 29 43 / 35 / 22 43 / 30 / 19 43 / 25 / 16 41 / 22 / NA 36 / 19 / NA 31 / 17 / NA 28 / NA / NA

7 < θ ≤ 27 48 / 45 / 29 47 / 41 / 26 46 / 37 / 24 44 / 31 / 20 42 / 27 / 17 40 / 23 / NA 38 / 20 / NA 35 / 18 / NA 31 / 16 / NA

27 < θ ≤ 45 45 / 45 / 45 45 / 45 / 45 43 / 43 / 43 40 / 40 / 40 37 / 37 / 37 35 / 33 / 33 32 / 29 / 29 30 / 26 / 26 27 / 23 / 23

45 < θ ≤ 90 48 48 45 38 32 28 25 22 19

θ < 7 35 / 35 / 35 35 / 35 / 35 35 / 35 / 35 35 / 35 / 32 35 / 35 / 27 35 / 35 / 23 35 / 33 / 20 35 / 29 / 18 35 / 25 / 16

7 < θ ≤ 27 39 / 39 / 39 39 / 39 / 39 39 / 39 / 39 39 / 39 / 34 39 / 39 / 29 39 / 39 / 25 39 / 34 / 22 38 / 30 / 19 36 / 27 / 17

27 < θ ≤ 45 37 / 37 / 37 37 / 37 / 37 37 / 37 / 37 37 / 37 / 37 37 / 37 / 37 37 / 37 / 37 37 / 37 / 37 36 / 36 / 36 34 / 34 / 34

45 < θ ≤ 90 43 43 43 43 43 43 41 37 32

θ < 7 35 / 35 / 32 35 / 35 / 29 35 / 35 / 26 35 / 35 / 22 35 / 30 / 19 35 / 26 / 16 35 / 23 / NA 35 / 20 / NA 33 / 18 / NA

7 < θ ≤ 27 39 / 39 / 34 39 / 39 / 31 39 / 39 / 28 39 / 37 / 24 38 / 32 / 21 37 / 28 / 18 35 / 24 / NA 34 / 21 / NA 33 / 19 / NA

27 < θ ≤ 45 37 / 37 / 37 37 / 37 / 37 37 / 37 / 37 37 / 37 / 37 36 / 36 / 36 34 / 34 / 34 32 / 32 / 32 30 / 30 / 30 28 / 27 / 27

45 < θ ≤ 90 43 43 43 43 39 33 29 26 23

θ < 7 35 / 35 / 32 35 / 35 / 29 35 / 35 / 22 35 / 30 / 19 35 / 25 / 16 35 / 22 / NA 35 / 19 / NA 31 / 17 / NA 28 / NA / NA

7 < θ ≤ 27 39 / 39 / 29 39 / 39 / 26 39 / 37 / 24 38 / 31 / 20 36 / 27 / 17 35 / 23 / NA 33 / 20 / NA 32 / 18 / NA 31 / 16 / NA

27 < θ ≤ 45 37 / 37 / 37 37 / 37 / 37 37 / 37 / 37 36 / 36 / 36 34 / 34 / 34 31 / 31 / 31 29 / 29 / 29 27 / 26 / 26 26 / 23 / 23

45 < θ ≤ 90 43 43 43 38 32 28 25 22 19

Snow

Load

Exposure

Category

Roof Pitch

(Degrees)

Wind Speed (MPH)

30 PSF

B

C

D

35 PSF

B

C

D

40 PSF

B

C

D

50 PSF

B

C

D

13 of 28



110 115 120 130 140 150 160 170 180

θ < 7 30 / 30 / 30 30 / 30 / 30 30 / 30 / 30 30 / 30 / 30 30 / 30 / 27 30 / 30 / 23 30 / 30 / 20 30 / 29 / 18 30 / 25 / 16

7 < θ ≤ 27 33 / 33 / 33 33 / 33 / 33 33 / 33 / 33 33 / 33 / 33 33 / 33 / 29 33 / 33 / 25 33 / 33 / 22 33 / 30 / 19 32 / 27 / 17

27 < θ ≤ 45 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31

45 < θ ≤ 90 37 37 37 37 37 37 37 37 32

θ < 7 30 / 30 / 30 30 / 30 / 29 30 / 30 / 26 30 / 30 / 22 30 / 30 / 19 30 / 26 / 16 30 / 23 / NA 30 / 20 / NA 30 / 18 / NA

7 < θ ≤ 27 33 / 33 / 33 33 / 33 / 31 33 / 33 / 28 33 / 33 / 24 33 / 32 / 21 32 / 28 / 18 31 / 24 / NA 30 / 21 / NA 29 / 19 / NA

27 < θ ≤ 45 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31 29 / 29 / 29 28 / 28 / 28 26 / 26 / 26

45 < θ ≤ 90 37 37 37 37 37 33 29 26 23

θ < 7 30 / 30 / 30 30 / 30 / 29 30 / 30 / 22 30 / 30 / 19 30 / 25 / 16 30 / 22 / NA 30 / 19 / NA 30 / 17 / NA 28 / NA / NA

7 < θ ≤ 27 33 / 33 / 29 33 / 33 / 26 33 / 33 / 24 33 / 31 / 20 32 / 27 / 17 31 / 23 / NA 30 / 20 / NA 29 / 18 / NA 28 / 16 / NA

27 < θ ≤ 45 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31 29 / 29 / 29 27 / 27 / 27 25 / 25 / 25 24 / 23 / 23

45 < θ ≤ 90 37 37 37 37 32 28 25 22 19

θ < 7 25 / 25 / 25 25 / 25 / 25 25 / 25 / 25 25 / 25 / 25 25 / 25 / 25 25 / 25 / 23 25 / 25 / 20 25 / 25 / 18 25 / 25 / 16

7 < θ ≤ 27 28 / 28 / 28 28 / 28 / 28 28 / 28 / 28 28 / 28 / 28 28 / 28 / 28 28 / 28 / 25 28 / 28 / 22 28 / 28 / 19 28 / 27 / 17

27 < θ ≤ 45 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27

45 < θ ≤ 90 32 32 32 32 32 32 32 32 32

θ < 7 25 / 25 / 25 25 / 25 / 25 25 / 25 / 25 25 / 25 / 22 25 / 25 / 19 25 / 25 / 16 25 / 23 / NA 25 / 20 / NA 25 / 18 / NA

7 < θ ≤ 27 28 / 28 / 28 28 / 28 / 28 28 / 28 / 28 28 / 28 / 24 28 / 28 / 21 28 / 28 / 18 28 / 24 / NA 27 / 21 / NA 26 / 19 / NA

27 < θ ≤ 45 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 26 / 26 / 26 24 / 24 / 24

45 < θ ≤ 90 32 32 32 32 32 32 29 26 23

θ < 7 25 / 25 / 25 25 / 25 / 25 25 / 25 / 22 25 / 25 / 19 25 / 25 / 16 25 / 22 / NA 25 / 19 / NA 25 / 17 / NA 25 / NA / NA

7 < θ ≤ 27 28 / 28 / 28 28 / 28 / 26 28 / 28 / 24 28 / 28 / 20 28 / 27 / 17 28 / 23 / NA 27 / 20 / NA 26 / 18 / NA 25 / 16 / NA

27 < θ ≤ 45 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 25 / 25 / 25 24 / 24 / 24 22 / 22 / 22

45 < θ ≤ 90 32 32 32 32 32 28 25 22 19

θ < 7 22 / 22 / 22 22 / 22 / 22 22 / 22 / 22 22 / 22 / 22 22 / 22 / 22 22 / 22 / 22 22 / 22 / 20 22 / 22 / 18 22 / 22 / 16

7 < θ ≤ 27 25 / 25 / 25 25 / 25 / 25 25 / 25 / 25 25 / 25 / 25 25 / 25 / 25 25 / 25 / 25 25 / 25 / 22 25 / 25 / 19 25 / 25 / 17

27 < θ ≤ 45 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24

45 < θ ≤ 90 29 29 29 29 29 29 29 29 29

θ < 7 22 / 22 / 22 22 / 22 / 22 22 / 22 / 22 22 / 22 / 22 22 / 22 / 19 22 / 22 / 16 22 / 22 / NA 22 / 20 / NA 22 / 18 / NA

7 < θ ≤ 27 25 / 25 / 25 25 / 25 / 25 25 / 25 / 25 25 / 25 / 24 25 / 25 / 21 25 / 25 / 18 25 / 24 / NA 25 / 21 / NA 24 / 19 / NA

27 < θ ≤ 45 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 23 / 23 / 23

45 < θ ≤ 90 29 29 29 29 29 29 29 26 23

θ < 7 22 / 22 / 22 22 / 22 / 22 22 / 22 / 22 22 / 22 / 19 22 / 22 / 16 22 / 22 / NA 22 / 19 / NA 22 / 17 / NA 22 / NA / NA

7 < θ ≤ 27 25 / 25 / 25 25 / 25 / 25 25 / 25 / 24 25 / 25 / 20 25 / 25 / 17 25 / 23 / NA 25 / 20 / NA 24 / 18 / NA 23 / 16 / NA

27 < θ ≤ 45 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 23 / 23 / 23 22 / 22 / 22 21 / 21 / 21

45 < θ ≤ 90 29 29 29 29 29 28 25 22 19

θ < 7 20 / 20 / 20 20 / 20 / 20 20 / 20 / 20 20 / 20 / 20 20 / 20 / 20 20 / 20 / 20 20 / 20 / 20 20 / 20 / 18 20 / 20 / 16

7 < θ ≤ 27 22 / 22 / 22 22 / 22 / 22 22 / 22 / 22 22 / 22 / 22 22 / 22 / 22 22 / 22 / 22 22 / 22 / 22 22 / 22 / 19 22 / 22 / 17

27 < θ ≤ 45 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21

45 < θ ≤ 90 26 26 26 26 26 26 26 26 26

θ < 7 20 / 20 / 20 20 / 20 / 20 20 / 20 / 20 20 / 20 / 20 20 / 20 / 19 20 / 20 / 16 20 / 20 / NA 20 / 20 / NA 20 / 18 / NA

7 < θ ≤ 27 22 / 22 / 22 22 / 22 / 22 22 / 22 / 22 22 / 22 / 22 22 / 22 / 21 22 / 22 / 18 22 / 22 / NA 22 / 21 / NA 22 / 19 / NA

27 < θ ≤ 45 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21

45 < θ ≤ 90 26 26 26 26 26 26 26 26 23

θ < 7 20 / 20 / 20 20 / 20 / 20 20 / 20 / 20 20 / 20 / 19 20 / 20 / 16 20 / 20 / NA 20 / 19 / NA 20 / 17 / NA 20 / NA / NA

7 < θ ≤ 27 22 / 22 / 22 22 / 22 / 22 22 / 22 / 22 22 / 22 / 20 22 / 22 / 17 22 / 22 / NA 22 / 20 / NA 22 / 18 / NA 21 / 16 / NA

27 < θ ≤ 45 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 20 / 20 / 20

45 < θ ≤ 90 26 26 26 26 26 26 25 22 19

Snow

Load

Exposure

Category

Roof Pitch

(Degrees)

Wind Speed (MPH)

60 PSF

B

C

D

90 PSF

B

C

D

70 PSF

B

C

D

80 PSF

B

C

D

14 of 28



110 115 120 130 140 150 160 170 180

θ < 7 48 / 48 / 37 48 / 48 / 33 48 / 48 / 31 48 / 41 / 26 48 / 35 / 22 48 / 30 / 19 48 / 27 / 17 44 / 23 / NA 39 / 21 / NA

7 < θ ≤ 27 48 / 48 / 40 48 / 48 / 36 48 / 48 / 33 48 / 44 / 28 48 / 37 / 24 48 / 32 / 21 48 / 28 / 18 48 / 25 / 16 43 / 22 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 46 / 46 48 / 40 / 40 43 / 35 / 35 38 / 31 / 31

45 < θ ≤ 90 48 48 48 48 45 39 34 30 27

θ < 7 48 / 44 / 27 48 / 40 / 25 48 / 36 / 23 48 / 30 / 19 48 / 26 / 16 42 / 23 / NA 37 / 20 / NA 32 / 17 / NA 29 / NA / NA

7 < θ ≤ 27 48 / 46 / 29 48 / 42 / 27 48 / 38 / 24 48 / 32 / 21 48 / 28 / 18 47 / 24 / NA 41 / 21 / NA 36 / 18 / NA 32 / 16 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 46 / 46 48 / 39 / 39 41 / 34 / 34 36 / 30 / 30 32 / 26 / 26 28 / 23 / 23

45 < θ ≤ 90 48 48 46 39 33 29 25 22 20

θ < 7 48 / 37 / 23 48 / 34 / 21 48 / 31 / 19 48 / 26 / 16 42 / 22 / NA 36 / 19 / NA 31 / 17 / NA 28 / NA / NA 24 / NA / NA

7 < θ ≤ 27 48 / 39 / 25 48 / 36 / 23 48 / 33 / 21 48 / 28 / 18 46 / 24 / NA 40 / 20 / NA 35 / 18 / NA 31 / 16 / NA 27 / NA / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 47 / 47 48 / 39 / 39 41 / 34 / 34 35 / 29 / 29 31 / 26 / 26 27 / 23 / 23 24 / 20 / 20

45 < θ ≤ 90 47 43 39 33 29 25 22 19 17

θ < 7 48 / 48 / 37 48 / 48 / 33 48 / 48 / 31 48 / 41 / 26 48 / 35 / 22 48 / 30 / 19 48 / 27 / 17 44 / 23 / NA 39 / 21 / NA

7 < θ ≤ 27 48 / 48 / 40 48 / 48 / 36 48 / 48 / 33 48 / 44 / 28 48 / 37 / 24 48 / 32 / 21 48 / 28 / 18 48 / 25 / 16 43 / 22 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 46 / 46 48 / 40 / 40 43 / 35 / 35 38 / 31 / 31

45 < θ ≤ 90 48 48 48 48 45 39 34 30 27

θ < 7 48 / 44 / 27 48 / 40 / 25 48 / 36 / 23 48 / 30 / 19 48 / 26 / 16 42 / 23 / NA 37 / 20 / NA 32 / 17 / NA 29 / NA / NA

7 < θ ≤ 27 48 / 46 / 29 48 / 42 / 27 48 / 38 / 24 48 / 32 / 21 48 / 28 / 18 47 / 24 / NA 41 / 21 / NA 36 / 18 / NA 32 / 16 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 46 / 46 48 / 39 / 39 41 / 34 / 34 36 / 30 / 30 32 / 26 / 26 28 / 23 / 23

45 < θ ≤ 90 48 48 46 39 33 29 25 22 20


7 < θ ≤ 27 48 / 39 / 25 48 / 36 / 23 48 / 33 / 21 48 / 28 / 18 46 / 24 / NA 40 / 20 / NA 35 / 18 / NA 31 / 16 / NA 27 / NA / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 47 / 47 48 / 39 / 39 41 / 34 / 34 35 / 29 / 29 31 / 26 / 26 27 / 23 / 23 24 / 20 / 20

45 < θ ≤ 90 47 43 39 33 29 25 22 19 17

θ < 7 48 / 48 / 37 48 / 48 / 33 48 / 48 / 31 48 / 41 / 26 48 / 35 / 22 48 / 30 / 19 48 / 27 / 17 44 / 23 / NA 39 / 21 / NA

7 < θ ≤ 27 48 / 48 / 40 48 / 48 / 36 48 / 48 / 33 48 / 44 / 28 48 / 37 / 24 48 / 32 / 21 48 / 28 / 18 48 / 25 / 16 43 / 22 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 46 / 46 48 / 40 / 40 43 / 35 / 35 38 / 31 / 31

45 < θ ≤ 90 48 48 48 48 45 39 34 30 27

θ < 7 48 / 44 / 27 48 / 40 / 25 48 / 36 / 23 48 / 30 / 19 48 / 26 / 16 42 / 23 / NA 37 / 20 / NA 32 / 17 / NA 29 / NA / NA

7 < θ ≤ 27 48 / 46 / 29 48 / 42 / 27 48 / 38 / 24 48 / 32 / 21 48 / 28 / 18 47 / 24 / NA 41 / 21 / NA 36 / 18 / NA 32 / 16 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 46 / 46 48 / 39 / 39 41 / 34 / 34 36 / 30 / 30 32 / 26 / 26 28 / 23 / 23

45 < θ ≤ 90 48 48 46 39 33 29 25 22 20


7 < θ ≤ 27 48 / 39 / 25 48 / 36 / 23 48 / 33 / 21 48 / 28 / 18 46 / 24 / NA 40 / 20 / NA 35 / 18 / NA 31 / 16 / NA 27 / NA / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 47 / 47 48 / 39 / 39 41 / 34 / 34 35 / 29 / 29 31 / 26 / 26 27 / 23 / 23 24 / 20 / 20

45 < θ ≤ 90 47 43 39 33 29 25 22 19 17

θ < 7 48 / 48 / 37 48 / 48 / 33 48 / 48 / 31 48 / 41 / 26 48 / 35 / 22 48 / 30 / 19 48 / 27 / 17 44 / 23 / NA 39 / 21 / NA

7 < θ ≤ 27 48 / 48 / 40 48 / 48 / 36 48 / 48 / 33 48 / 44 / 28 48 / 37 / 24 48 / 32 / 21 48 / 28 / 18 48 / 25 / 16 43 / 22 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 46 / 46 46 / 40 / 40 42 / 35 / 35 38 / 31 / 31

45 < θ ≤ 90 48 48 48 48 45 39 34 30 27

θ < 7 48 / 44 / 27 48 / 40 / 25 48 / 36 / 23 48 / 30 / 19 48 / 26 / 16 42 / 23 / NA 37 / 20 / NA 32 / 17 / NA 29 / NA / NA

7 < θ ≤ 27 48 / 46 / 29 48 / 42 / 27 48 / 38 / 24 48 / 32 / 21 48 / 28 / 18 47 / 24 / NA 41 / 21 / NA 36 / 18 / NA 32 / 16 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 46 / 46 45 / 39 / 39 41 / 34 / 34 36 / 30 / 30 32 / 26 / 26 28 / 23 / 23

45 < θ ≤ 90 48 48 46 39 33 29 25 22 20


7 < θ ≤ 27 48 / 39 / 25 48 / 36 / 23 48 / 33 / 21 48 / 28 / 18 46 / 24 / NA 40 / 20 / NA 35 / 18 / NA 31 / 16 / NA 27 / NA / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 47 / 47 45 / 39 / 39 41 / 34 / 34 35 / 29 / 29 31 / 26 / 26 27 / 23 / 23 24 / 20 / 20

45 < θ ≤ 90 47 43 39 33 29 25 22 19 17

25 PSF

B

C

D

10 PSF

B

C

D

20 PSF

B

C

D

Snow

Load

Exposure

Category

Roof Pitch

(Degrees)

Wind Speed (MPH)

0 PSF

B

C

D

15 of 28



110 115 120 130 140 150 160 170 180

θ < 7 48 / 48 / 37 48 / 48 / 33 48 / 48 / 31 48 / 41 / 26 48 / 35 / 22 48 / 30 / 19 48 / 27 / 17 44 / 23 / NA 39 / 21 / NA

7 < θ ≤ 27 48 / 48 / 40 48 / 48 / 36 48 / 48 / 33 48 / 44 / 28 48 / 37 / 24 48 / 32 / 21 48 / 28 / 18 48 / 25 / 16 43 / 22 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 46 / 46 / 46 43 / 40 / 40 40 / 35 / 35 37 / 31 / 31

45 < θ ≤ 90 48 48 48 48 45 39 34 30 27

θ < 7 48 / 44 / 27 48 / 40 / 25 48 / 36 / 23 48 / 30 / 19 48 / 26 / 16 42 / 23 / NA 37 / 20 / NA 32 / 17 / NA 29 / NA / NA

7 < θ ≤ 27 48 / 46 / 29 48 / 42 / 27 48 / 38 / 24 48 / 32 / 21 48 / 28 / 18 47 / 24 / NA 41 / 21 / NA 36 / 18 / NA 32 / 16 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 46 / 46 / 46 42 / 39 / 39 39 / 34 / 34 36 / 30 / 30 32 / 26 / 26 28 / 23 / 23

45 < θ ≤ 90 48 48 46 39 33 29 25 22 20


7 < θ ≤ 27 48 / 39 / 25 48 / 36 / 23 48 / 33 / 21 48 / 28 / 18 46 / 24 / NA 40 / 20 / NA 35 / 18 / NA 31 / 16 / NA 27 / NA / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 46 / 46 / 46 42 / 39 / 39 39 / 34 / 34 35 / 29 / 29 31 / 26 / 26 27 / 23 / 23 27 / 23 / 23

45 < θ ≤ 90 47 43 39 33 29 25 22 19 17

θ < 7 48 / 48 / 37 48 / 48 / 33 48 / 48 / 31 48 / 41 / 26 48 / 35 / 22 48 / 30 / 19 48 / 27 / 17 44 / 23 / NA 39 / 21 / NA

7 < θ ≤ 27 48 / 48 / 40 48 / 48 / 36 48 / 48 / 33 48 / 44 / 28 48 / 37 / 24 48 / 32 / 21 46 / 28 / 18 44 / 25 / 16 42 / 22 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 48 / 48 / 48 46 / 46 / 46 43 / 43 / 43 40 / 40 / 40 38 / 35 / 35 35 / 31 / 31

45 < θ ≤ 90 48 48 48 48 45 39 34 30 27

θ < 7 48 / 44 / 27 48 / 40 / 25 48 / 36 / 23 48 / 30 / 19 48 / 26 / 16 42 / 23 / NA 37 / 20 / NA 32 / 17 / NA 29 / NA / NA

7 < θ ≤ 27 48 / 46 / 29 48 / 42 / 27 48 / 38 / 24 48 / 32 / 21 46 / 28 / 18 43 / 24 / NA 41 / 21 / NA 36 / 18 / NA 32 / 16 / NA

27 < θ ≤ 45 48 / 48 / 48 48 / 48 / 48 47 / 47 / 47 43 / 43 / 43 40 / 39 / 39 37 / 34 / 34 34 / 30 / 30 32 / 26 / 26 28 / 23 / 23

45 < θ ≤ 90 48 48 46 39 33 29 25 22 20


7 < θ ≤ 27 48 / 39 / 25 48 / 36 / 23 48 / 33 / 21 46 / 28 / 18 43 / 24 / NA 40 / 20 / NA 35 / 18 / NA 31 / 16 / NA 27 / NA / NA

27 < θ ≤ 45 47 / 47 / 47 45 / 45 / 45 44 / 44 / 44 40 / 39 / 39 37 / 34 / 34 34 / 29 / 29 31 / 26 / 26 27 / 23 / 23 24 / 20 / 20

45 < θ ≤ 90 47 43 39 33 29 25 22 19 17

θ < 7 43 / 43 / 37 43 / 43 / 33 43 / 43 / 31 43 / 41 / 26 43 / 35 / 22 43 / 30 / 19 43 / 27 / 17 43 / 23 / NA 39 / 21 / NA

7 < θ ≤ 27 48 / 48 / 40 48 / 48 / 36 48 / 48 / 33 48 / 44 / 28 46 / 37 / 24 44 / 32 / 21 43 / 28 / 18 41 / 25 / 16 39 / 22 / NA

27 < θ ≤ 45 45 / 45 / 45 45 / 45 / 45 45 / 45 / 45 45 / 45 / 45 43 / 43 / 43 41 / 41 / 41 38 / 38 / 38 36 / 35 / 35 34 / 31 / 31

45 < θ ≤ 90 48 48 48 48 45 39 34 30 27

θ < 7 43 / 43 / 27 43 / 40 / 25 43 / 36 / 23 43 / 30 / 19 43 / 26 / 16 42 / 23 / NA 37 / 20 / NA 32 / 17 / NA 29 / NA / NA

7 < θ ≤ 27 48 / 46 / 29 47 / 42 / 27 46 / 38 / 24 44 / 32 / 21 42 / 28 / 18 40 / 24 / NA 38 / 21 / NA 36 / 18 / NA 32 / 16 / NA

27 < θ ≤ 45 45 / 45 / 45 45 / 45 / 45 44 / 44 / 44 41 / 41 / 41 38 / 38 / 38 35 / 34 / 34 33 / 30 / 30 30 / 26 / 26 28 / 23 / 23

45 < θ ≤ 90 48 48 46 39 33 29 25 22 20


7 < θ ≤ 27 47 / 39 / 25 45 / 36 / 23 44 / 33 / 21 42 / 28 / 18 40 / 24 / NA 38 / 20 / NA 35 / 18 / NA 31 / 16 / NA 27 / NA / NA

27 < θ ≤ 45 44 / 44 / 44 43 / 43 / 43 41 / 41 / 41 38 / 38 / 38 35 / 34 / 34 32 / 29 / 29 30 / 26 / 26 27 / 23 / 23 24 / 20 / 20

45 < θ ≤ 90 47 43 39 33 29 25 22 19 17

θ < 7 35 / 35 / 35 35 / 35 / 33 35 / 35 / 31 35 / 35 / 26 35 / 35 / 22 35 / 30 / 19 35 / 27 / 17 35 / 23 / NA 35 / 21 / NA

7 < θ ≤ 27 39 / 39 / 39 39 / 39 / 36 39 / 39 / 33 39 / 39 / 28 39 / 37 / 24 38 / 32 / 21 35 / 28 / 18 36 / 25 / 16 34 / 22 / NA

27 < θ ≤ 45 37 / 37 / 37 37 / 37 / 37 37 / 37 / 37 37 / 37 / 37 37 / 37 / 37 36 / 36 / 36 34 / 34 / 34 32 / 32 / 32 31 / 31 / 31

45 < θ ≤ 90 43 43 43 43 43 39 34 30 27

θ < 7 35 / 35 / 27 35 / 35 / 25 35 / 35 / 23 35 / 30 / 19 35 / 26 / 16 35 / 23 / NA 35 / 20 / NA 32 / 17 / NA 29 / NA / NA

7 < θ ≤ 27 39 / 39 / 29 39 / 39 / 27 39 / 38 / 24 38 / 32 / 21 37 / 28 / 18 35 / 24 / NA 34 / 21 / NA 32 / 18 / NA 31 / 16 / NA

27 < θ ≤ 45 37 / 37 / 37 37 / 37 / 37 37 / 37 / 37 36 / 36 / 36 34 / 34 / 34 32 / 32 / 32 30 / 30 / 30 28 / 26 / 26 26 / 23 / 23

45 < θ ≤ 90 43 43 43 39 33 29 25 22 20


7 < θ ≤ 27 39 / 39 / 25 39 / 36 / 23 38 / 33 / 21 37 / 28 / 18 35 / 24 / NA 34 / 20 / NA 32 / 18 / NA 31 / 16 / NA 27 / NA / NA

27 < θ ≤ 45 37 / 37 / 37 37 / 37 / 37 37 / 37 / 37 34 / 34 / 34 32 / 32 / 32 29 / 29 / 29 27 / 26 / 26 25 / 23 / 23 24 / 20 / 20

45 < θ ≤ 90 43 43 39 33 29 25 22 19 17

50 PSF

B

C

D

35 PSF

B

C

D

40 PSF

B

C

D

Roof Pitch

(Degrees)

Wind Speed (MPH)

30 PSF

B

C

D

Snow

Load

Exposure

Category

16 of 28



110 115 120 130 140 150 160 170 180

θ < 7 30 / 30 / 30 30 / 30 / 30 30 / 30 / 30 30 / 30 / 26 30 / 30 / 22 30 / 30 / 19 30 / 27 / 17 30 / 23 / NA 30 / 21 / NA

7 < θ ≤ 27 33 / 33 / 33 33 / 33 / 33 33 / 33 / 33 33 / 33 / 28 33 / 33 / 24 33 / 32 / 21 30 / 28 / 18 32 / 25 / 16 31 / 22 / NA

27 < θ ≤ 45 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31 30 / 30 / 30 28 / 28 / 28

45 < θ ≤ 90 37 37 37 37 37 37 34 30 27

θ < 7 30 / 30 / 27 30 / 30 / 25 30 / 30 / 23 30 / 30 / 19 30 / 26 / 16 30 / 23 / NA 30 / 20 / NA 30 / 17 / NA 29 / NA / NA

7 < θ ≤ 27 33 / 33 / 29 33 / 33 / 27 33 / 33 / 24 33 / 32 / 21 32 / 28 / 18 31 / 24 / NA 30 / 21 / NA 29 / 18 / NA 28 / 16 / NA

27 < θ ≤ 45 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31 29 / 29 / 29 27 / 27 / 27 26 / 26 / 26 24 / 23 / 23

45 < θ ≤ 90 37 37 37 37 33 29 25 22 20


7 < θ ≤ 27 33 / 33 / 25 33 / 33 / 23 33 / 33 / 21 32 / 28 / 18 31 / 24 / NA 30 / 20 / NA 29 / 18 / NA 28 / 16 / NA 26 / NA / NA

27 < θ ≤ 45 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31 31 / 31 / 31 29 / 29 / 29 27 / 27 / 27 25 / 25 / 25 24 / 23 / 23 22 / 20 / 20

45 < θ ≤ 90 37 37 37 33 29 25 22 19 17

θ < 7 25 / 25 / 25 25 / 25 / 25 25 / 25 / 25 25 / 25 / 25 25 / 25 / 22 25 / 25 / 19 25 / 25 / 17 25 / 23 / NA 25 / 21 / NA

7 < θ ≤ 27 28 / 28 / 28 28 / 28 / 28 28 / 28 / 28 28 / 28 / 28 28 / 28 / 24 28 / 28 / 21 28 / 28 / 18 28 / 25 / 16 28 / 22 / NA

27 < θ ≤ 45 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 26 / 26 / 26

45 < θ ≤ 90 32 32 32 32 32 32 32 30 27

θ < 7 25 / 25 / 25 25 / 25 / 25 25 / 25 / 23 25 / 25 / 19 25 / 25 / 16 25 / 23 / NA 25 / 20 / NA 25 / 17 / NA 25 / NA / NA

7 < θ ≤ 27 28 / 28 / 28 28 / 28 / 27 28 / 28 / 24 28 / 28 / 21 28 / 28 / 18 28 / 24 / NA 27 / 21 / NA 26 / 18 / NA 25 / 16 / NA

27 < θ ≤ 45 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 25 / 25 / 25 24 / 24 / 24 23 / 23 / 23

45 < θ ≤ 90 32 32 32 32 32 29 25 22 20


7 < θ ≤ 27 28 / 28 / 25 28 / 28 / 23 28 / 28 / 21 28 / 28 / 18 28 / 24 / NA 27 / 20 / NA 26 / 18 / NA 25 / 16 / NA 24 / NA / NA

27 < θ ≤ 45 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 27 / 27 / 27 25 / 25 / 25 24 / 24 / 24 22 / 22 / 22 21 / 20 / 20

45 < θ ≤ 90 32 32 32 32 29 25 22 19 17

θ < 7 22 / 22 / 22 22 / 22 / 22 22 / 22 / 22 22 / 22 / 22 22 / 22 / 22 22 / 22 / 19 22 / 22 / 17 22 / 22 / NA 22 / 21 / NA

7 < θ ≤ 27 25 / 25 / 25 25 / 25 / 25 25 / 25 / 25 25 / 25 / 25 25 / 25 / 24 25 / 25 / 21 25 / 25 / 18 25 / 25 / 16 25 / 22 / NA

27 < θ ≤ 45 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24

45 < θ ≤ 90 29 29 29 29 29 29 29 29 27

θ < 7 22 / 22 / 22 22 / 22 / 22 22 / 22 / 22 22 / 22 / 19 22 / 22 / 16 22 / 22 / NA 22 / 20 / NA 22 / 17 / NA 22 / NA / NA

7 < θ ≤ 27 25 / 25 / 25 25 / 25 / 25 25 / 25 / 24 25 / 25 / 21 25 / 25 / 18 25 / 24 / NA 25 / 21 / NA 24 / 18 / NA 23 / 16 / NA

27 < θ ≤ 45 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 22 / 22 / 22 21 / 21 / 21

45 < θ ≤ 90 29 29 29 29 29 29 25 22 20


7 < θ ≤ 27 25 / 25 / 25 25 / 25 / 23 25 / 25 / 21 25 / 25 / 18 25 / 24 / NA 25 / 20 / NA 24 / 18 / NA 23 / 16 / NA 22 / NA / NA

27 < θ ≤ 45 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 24 / 24 / 24 23 / 23 / 23 22 / 22 / 22 21 / 21 / 21 20 / 20 / 20

45 < θ ≤ 90 29 29 29 29 29 25 22 19 17

θ < 7 20 / 20 / 20 20 / 20 / 20 20 / 20 / 20 20 / 20 / 20 20 / 20 / 20 20 / 20 / 19 20 / 20 / 17 20 / 20 / NA 20 / 20 / NA

7 < θ ≤ 27 22 / 22 / 22 22 / 22 / 22 22 / 22 / 22 22 / 22 / 22 22 / 22 / 22 22 / 22 / 21 22 / 22 / 18 22 / 22 / 16 22 / 22 / NA

27 < θ ≤ 45 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21

45 < θ ≤ 90 26 26 26 26 26 26 26 26 26

θ < 7 20 / 20 / 20 20 / 20 / 20 20 / 20 / 20 20 / 20 / 19 20 / 20 / 16 20 / 20 / NA 20 / 20 / NA 20 / 17 / NA 20 / NA / NA

7 < θ ≤ 27 22 / 22 / 22 22 / 22 / 22 22 / 22 / 22 22 / 22 / 21 22 / 22 / 18 22 / 22 / NA 22 / 21 / NA 22 / 18 / NA 21 / 16 / NA

27 < θ ≤ 45 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 20 / 20 / 20

45 < θ ≤ 90 26 26 26 26 26 26 25 22 20


7 < θ ≤ 27 22 / 22 / 22 22 / 22 / 22 22 / 22 / 21 22 / 22 / 18 22 / 22 / NA 22 / 20 / NA 22 / 18 / NA 21 / 16 / NA 20 / NA / NA

27 < θ ≤ 45 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 21 / 21 / 21 20 / 20 / 20 19 / 19 / 19

45 < θ ≤ 90 26 26 26 26 26 25 22 19 17

90 PSF

B

C

D

70 PSF

B

C

D

80 PSF

B

C

D

Roof Pitch

(Degrees)

Wind Speed (MPH)

60 PSF

B

C

D

Snow

Load

Exposure

Category

17 of 28

Appendix A: ASCE 7-10 to ASCE 7-05 Wind Conversion

This appendix is applicable for converting to different years for IBC codes.

The Mount spacing tables were compiled with LRFD wind speeds (ASCE 7-10) the velocity equivalence

table below adjusts the 7-10 (LRFD) wind speeds to the appropriate 7-05 (ASD) wind speeds.

Velocity Equivalence

Code Reference: ASCE 7-10 ASCE 7-05

Vult. (mph) V3-sec (mph)

110 85

115 89

120 93

130 101

140 108

150 116

160 124

170 132

180 139

Note: 1) Wind speeds for PV assume Risk Category II

18 of 28

Appendix B: Snow Load Conversion This appendix is applicable for Authorities Having Jurisdiction (AHJ’s) with minimum roof snow loads OR non-reducible

ground snow loads for roof pitches under 45 degrees and roof pitches between 45 and 90 degrees.

Mount spacing tables were compiled utilizing ground snow loads, which are reduced to flat roof snow loads for pitches

under 45 degrees, and to sloped roof snow loads for roof pitches between 45 and 90 degrees. For AHJ’s specifying

minimum roof snow loads or non-reducible ground snow loads, the user shall convert the specified snow load to the

equivalent ground snow load in the Snow Load Conversion Table below to utilize the SnapNrack RL Mount Spacing

Table(s).

Snow Load Conversion Table

Specified

Minimum Roof

Snow Load (psf)

Equivalent Ground Snow Load (psf)

for use in Span Table(s)

Roof Pitch:

0° ≤ θ < 45°

Roof Pitch:

45° ≤ θ ≤ 90°

10 20 20

20 25 40

25 35 60

30 40 60

35 50 80

40 60 90

50 70 NA

60 80 110

70 90 120

80 100 NA

90 120 NA

Table B: Conversion Table for Minimum Specified and/or Non-Reducible Snow Loads

Note: Calculated Snow Loads for roof-mounted solar photovoltaic installations assume Risk Category II.

Example Conversion

Given(s): AHJ requires minimum 30 psf roof snow load.

Existing roof pitch is 6 in 12 = 27°

Step 1) Locate specified roof snow load in column 1 (30 psf).

Step 2) Determine which Roof Pitch column applies. Column 2 applies for

the given condition.

Step 3) Select 40 psf from column 2 as the equivalent ground snow load for use in the Span Table(s).

25 35 60

30 40 60

35 50 80

Step 1 Step 2

Step 3

19 of 28

Appendix C: Worst Case Reactions

The following are the maximum RL Composition-Shingle-Roof System factored (ASD) reactions:

RL - Composition Shingle Roof Factored (ASD)

Reactions

Load Type Magnitude

Tension (Uplift): 604.50 Lbs

Compression (Down Force): 652.92 Lbs

Lateral (Down Slope): 504.43 Lbs

Load Direction Diagram

20 of 28

Appendix D: RL Cantilever Deck Mount

SnapNrack RL Cantilever Deck Mount Zone 1 / Zone 2

Roof Height: 0-30 ft

Exposure

Category

Roof Pitch

(Degrees)

Wind Speed (MPH)

110 115 120 130 140 150 160 170 180

B

θ < 7 1/1 1/1 1/1 1/2 1/2 1/2 1/2 2/2 2/-

7 < θ ≤ 27 1/1 1/1 1/1 1/2 1/2 1/2 1/2 1/2 2/2

27 < θ ≤ 45 1/1 1/1 1/1 1/1 1/1 1/2 1/2 1/2 2/2

45 < θ ≤ 90 1/1 1/1 1/1 1/1 2/2 2/2 2/2 2/2 2/2

C

θ < 7 1/2 1/2 1/2 1/2 1/2 2/- 2/- 2/- 2/-

7 < θ ≤ 27 1/2 1/2 1/2 1/2 1/2 2/- 2/- 2/- 2/-

27 < θ ≤ 45 1/1 1/1 1/1 1/2 2/2 2/2 2/2 2/2 2/-

45 < θ ≤ 90 1/1 1/1 2/2 2/2 2/2 2/2 2/2 -/- -/-

SnapNrack RL Cantilever Deck Mount Zone 1 / Zone 2

Roof Height: 30-60 ft

Exposure

Category

Roof Pitch

(Degrees)

Wind Speed (MPH)

110 115 120 130 140 150 160 170 180

B

θ < 7 1/1 1/2 1/2 1/2 1/2 2/2 2/- 2/- 2/-

7 < θ ≤ 27 1/1 1/1 1/2 1/2 1/2 1/2 2/2 2/- 2/-

27 < θ ≤ 45 1/1 1/1 1/1 1/1 1/2 2/2 2/2 2/2 2/2

45 < θ ≤ 90 1/1 1/1 1/1 2/2 2/2 2/2 2/2 2/2 -/-

C

θ < 7 1/2 1/2 1/2 1/2 2/- 2/- 2/- 2/- 2/-

7 < θ ≤ 27 1/2 1/2 1/2 1/2 2/- 2/- 2/- 2/- 2/-

27 < θ ≤ 45 1/1 1/1 1/2 2/2 2/2 2/2 2/2 2/- 2/-

45 < θ ≤ 90 2/2 2/2 2/2 2/2 2/2 2/2 -/- -/- -/-

NOTES: • 1 = Single Column of Deck Mounts required

• 2 = Double column of Deck Mounts required

• "Column" is defined as a colinear arrangement of mounts running parallel to rafters

• RL Cantilever Deck Mount solution not applicable in Zone 3 or Exposure Category D.

• RL Cantilever Deck Mount solution not applicable under loading conditions, denoted by the " - " symbol.

• RL Cantilever Deck Mount solution is applicable to an over-extended cantilever application. Deck mount

is not required when standard cantilever is installed. See Figure 1.0.

• See detail SD-00701 for Deck Mount system detail and installation specifications.

• The above tables are applicable for Portrait and Landscape orientation.

• The above tables are applicable for ground snow loads of 0 - 90 psf.

DESCRIPTION:PART NUMBER:SCALE:DESIGNER:

APPROVED BY:

REVISION:

Sunrun South LLC595 MARKET STREET, 29TH FLOOR ● SAN FRANCISCO, CA 94105 USA

PHONE (415) 580-6900 ● FAX (415) 580-6902



SYSTEM OVERVIEW, FLASHTRACK COMPSD-00700

A 6/19/2017 NEW ITEMB 8/22/2018 DECK MOUNT

REV

BDATE:

NTS

8/22/2018DRAFTER: G.Viscuso

G.McPheeters

G.McPheeters


GTVECF

SNAPNRACK RL SOLAR MOUNTING SOLUTION INSTALLED ON COMPOSITION SHINGLE ROOF ROOF ATTACHMENT: SNAPNRACK FLASHTRACK COMP MODULE ATTACHMENT: SNAPNRACK A MOUNTS AND B MOUNTS SNAPNRACK C LINKS CONNECT MODULE FRAMES TOGETHER TO ACT AS A CONTINUOUS STRUCTURAL ELEMENT "LANDSCAPE" MODULE ORIENTATION SHOWN, FOR "PORTRAIT" INSTALLATION REFER TO SD-00703

STANDARD MODULE (TYP.)

SNAPNRACK C LINK

ROOF RAFTER (TYP.)

ROOF SHEATHING, UNDERLAYMENT,AND ROOFING MATERIAL (TYP.)

SNAPNRACK FLASHTRACK COMP (TYP.)

SNAPNRACK A MOUNT

SNAPNRACK B MOUNT


APPROVED BY:

REVISION:


PHONE (415) 580-6900 ● FAX (415) 580-6902



System Detail, Deck MountSD-00701

A 8/27/2018 NEW ITEM

REV

ADATE:

NTS

8/27/2018DRAFTER: E.Figurski

G.McPheeters

G.McPheeters


ECFSNAPNRACK RL SOLAR MOUNTING SOLUTION DECK MOUNT DETAIL WHEN CANTILEVER LENGTH EXCEEDS L/3, MOUNTING THE RL COMP FLASH TRACK DIRECTLY TO ROOF DECK IS PERMISSABLE TO ADD SUPPORT TO THE OVER-EXTENDED CANTILEVER. SEE TABLE IN APPENDIX FOR CONDITIONS WHEN SINGLE OR DOUBLE COLUMNS OF DECK MOUNTS ARE ACCEPTABLE. COLUMN IS DEFINED AS A COLINEAR ARRANGEMENT OF MOUNTS RUNNING NORTH-SOUTH ALONG THE ROOF PLANE. WHEN A SINGLE COLUMN OF DECK MOUNTS ARE PERMITTED PER THE APPENDIX, THEN DECK MOUNTS MUST BE ATTACHED BETWEEN THE CENTER OF THE CANTILEVERED PORTION AND THE OUTER EDGE OF THE MODULE. IF DOUBLE COLUMNS OF DECK MOUNTS ARE SPECIFIED, DISTRIBUTE THE DECK MOUNTS AT 1/3 AND 2/3 OF THE CANTILEVER.

STANDARD MODULE (TYP.)(PORTRAIT ORIENTATION SHOWN)

SUPPORT SPACING, L(DISTANCE BETWEENROOF ATTACHMENTS) SEE APPROPRIATEENGINEERING TABLES FORMAXIMUM SUPPORT SPACING

MODULE CANTILEVER FROMRAFTER SEE SD-00702 AND SD-00703 FOR FURTHERDETAILS

SNAPNRACK C LINK (TYP.)

OVER-EXTENDED CANTILEVERGREATER THAN L/3 LIMIT

SEE APPENDIX FOR

CONDITIONS WHERE DECK MOUNTING IS PERMISSABLE

SNAPNRACK B MOUNT (TYP.)

SNAPNRACK A MOUNT (TYP.)

FOR STANDARD COMPOSITION SHINGLE,

2" x 5/16" STAINLESS STEEL LAG SCREW.

FOR PRESIDENTIAL COMPOSITION SHINGLE,

2 1/2" x 5/16" STAINLESS STEEL LAG SCREW.

ROOF RAFTER (TYP.)

RL COMP FLASHTRACK KIT (TYP.)

ROOF DECKING (TYP.)

X (2'-0" MAX)

UMBRELLA WASHER (TYP.)

FOR DECK MOUNTS INSTALL D TOWER DIRECTLY OVER THE LAG, OR ON CENTER OF THE TRACK.

D TOWER(TYP.)

LEVELER (TYP.)

FOR SINGLE COLUMNLOCATE DECK MOUNTBETWEEN CENTER TO END

FOR DOUBLE COLUMNLOCATE DECK MOUNTS X/3 AND 2X/3 FROM RAFTER

X/3

FLASHINGS MAYOVERLAP

FLASHING(TYP.)

X/2


APPROVED BY:

REVISION:


PHONE (415) 580-6900 ● FAX (415) 580-6902



SYSTEM LAYOUT, LANDSCAPESD-00702


REV

BDATE:

NTS


G.McPheeters

G.McPheeters


GTVECF

SNAPNRACK RL SOLAR MOUNTING SOLUTION INSTALLED IN LANDSCAPE *MODULE CANTILEVER IS THE DISTANCE BETWEEN THE MODULE EDGE AND THE CENTERLINE OF THE FLASH TRACK. SEE FIGURE 1.0 FOR FURTHER ILLUSTRATION AND DETAILS.

STANDARD MODULE (TYP.)LANDSCAPE ORIENTATION


ROOF RAFTER (TYP.) ROOF ATTACHMENTS SHALLBE EMBEDDED INTO ROOF RAFTERS OR OTHERSTRUCTURAL MEMBERS

SUPPORT SPACING(DISTANCE BETWEENROOF ATTACHMENTS)

SEE APPROPRIATEENGINEERING TABLES FOR

MAXIMUM SUPPORT SPACING

MODULE CANTILEVER NOT TO EXCEED1/3 OF TABULATED SPAN (24" MAX)* WHERE MODULE CANTILEVER EXCEEDS1/3 OF TABULATED SPAN, SEE SD-00701FOR INSTALLATION AND APPENDIX FORALLOWABLE CONDITIONS.

SNR A MOUNT (TYP.)

SNR B MOUNT(TYP.)


APPROVED BY:

REVISION:


PHONE (415) 580-6900 ● FAX (415) 580-6902



SYSTEM LAYOUT, PORTRAITSD-00703


REV

BDATE:

NTS


G.McPheeters

G.McPheeters


GTVECF

SNAPNRACK RL SOLAR MOUNTING SOLUTION INSTALLED IN PORTRAIT *MODULE CANTILEVER IS THE DISTANCE BETWEEN THE MODULE EDGE AND THE CENTERLINE OF THE FLASH TRACK. SEE FIGURE 1.0 FOR FURTHER ILLUSTRATION AND DETAILS.

STANDARD MODULE (TYP.)PORTRAIT ORIENTATION


ROOF RAFTER (TYP.)

ROOF ATTACHMENTS SHALLBE EMBEDDED INTO

ROOF RAFTERS OR OTHERSTRUCTURAL MEMBERS

SUPPORT SPACING(DISTANCE BETWEENROOF ATTACHMENTS)

SEE APPROPRIATEENGINEERING TABLES FOR

MAXIMUM SUPPORT SPACING

MODULE CANTILEVER NOT TO EXCEED1/3 OF TABULATED SPAN (24" MAX)* WHERE MODULE CANTILEVER EXCEEDS1/3 OF TABULATED SPAN, SEE SD-00701FOR INSTALLATION AND APPENDIX FORALLOWABLE CONDITIONS.

SNR A MOUNT (TYP.)

SNR B MOUNT (TYP.)

DETAIL BDETAIL A

DETAIL C


APPROVED BY:

REVISION:


PHONE (415) 580-6900 ● FAX (415) 580-6902



SYSTEM DETAIL, HARDWARESD-00704

A 6/19/2017 NEW ITEMB 8/22/2018 NEW ITEM

REV

BDATE:

NTS


G.McPheeters

G.McPheeters


GTVECF

B

A

SNAPNRACK RL SYSTEM DETAILS TORQUE ALL HARDWARE TO THE FOLLOWING VALUES:A AND B MOUNT HARDWARE*: 12-14 FT-LBS*FOR HANWHA, B MOUNT CLAMP BOLT: 16 FT-LBSC LINK BOLT: 9-10 FT-LBS FOR UNEVEN ROOF SURFACES, EACH MOUNT HAS 1-1/2" OF LEVELING CAPABILITY IN 1/12" INCREMENTS USE 242-92254 FLASHTRACK SPACER FOR AN ADDITIONAL 1-1/4" OF LEVELING **B MOUNT CLAMP BOLT ONLY CLAMPS THE MODULE BELOW. THE MODULE ABOVE THE MOUNT (UP ROOF) IS SECURED WITH A SLEEVE CONNECTION.

ROOF RAFTER (TYP.)

ROOF ATTACHMENTS SHALLBE EMBEDDED INTO

ROOF RAFTERS OR OTHERSTRUCTURAL MEMBERS

SNAPNRACK A MOUNT

SNAPNRACK B MOUNT

FLASHTRACK

SLIDE B MOUNT AGAINSTMODULE FRAME ANDTORQUE CLAMP BOLT

REST MODULE ONB MOUNT FLANGEAND ROCK INTO PLACE

ATTACH C LINK TOINSTALLED MODULE

LINK ACTS AS ASUPPORT FOR THE

NEXT MODULESEE DETAIL C AND

SD-00706

INSTALLEDMODULE

C LINK

ORIENT C LINK CLAMPTO CLAMP ONTO THEINSTALLED MODULE

REST MODULE ON THEC LINK BOTTOM FLANGEAND ROCK INTO PLACE

ROCK MODULE DOWN TO INSTALL

REST MODULE FRAMEON A MOUNT SLEEVESAND ROCK INTO PLACE

CLAMP BOLT**

MODULE

CLAMP TOP

B MOUNT FLANGE

LEVELERLEVELER BOLT

D TOWER(BEHIND LEVELER)

UMBRELLA LAG SCREW

LEVELER

A MOUNT PRCMODULE SLEEVE

DETAIL B

DETAIL A


APPROVED BY:

REVISION:


PHONE (415) 580-6900 ● FAX (415) 580-6902



SYSTEM DETAIL, C LINKSD-00706


REV

ADATE:

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G.McPheeters

G.McPheeters


GTV

B

A

SNAPNRACK RL C LINK STRUCTURALLY CONNECTS TWO MODULES TOGETHER IN A ROW C LINK SLEEVES THE MODULE FRAME C LINKS MATCH MODULE FRAME HEIGHT C LINK CLAMP FASTENS THE LINK TO THE MODULE FRAME(S) THE CLAMP ALIGNS MODULES WITH A 3/4" GAP BETWEEN COLUMNS BONDING TEETH ON THE CLAMP TOP RESIST MODULE MOVEMENT DRAIN HOLES ALLOW WATER TO DRAIN FROM THE MODULE FRAME C LINKS CONNECT TWO ADJACENT MODULES TOGETHER IN THE SAME ROWLINKS MUST BE INSTALLED ON BOTH SIDES OF THE MODULE (REFER TO SD-00704) WHEN ADJACENT MODULES ARE IN SAME ORIENTATION C LINKS SHALL BE TIGHT AGAINST THE MODULE FRAME WHEN INSTALLED PROPERLY LOOSEN CLAMP BOLT AND PULL CLAMP UP TO CHANGE CLAMP ORIENTATION

DOWNSLOPE(TO EAVE)

DRAIN HOLE PATTERN

MODULE FRAME HEIGHTSTAMPED INTO PART

C LINK CLAMP BOLT

C LINK CLAMP

C LINK SLEEVE

ORIENT C LINK CLAMPTO CLAMP ONTO THEMODULE INSTALLED FIRST

ORIENT C LINK CLAMPTO CLAMP ONTO BOTH MODULES

MODULE

COMPLETED INSTALLATION

COMPLETED INSTALLATIONSECTION VIEWDETAIL A


APPROVED BY:

REVISION:


PHONE (415) 580-6900 ● FAX (415) 580-6902



PENETRATION DETAIL, FLASHTRACK COMPSD-00708


REV

BDATE:

NTS


G.McPheeters

G.McPheeters


GTVECF

A

SNAPNRACK RL FLASHTRACK COMP MOUNTING EMBED 5/16" UMBRELLA LAG SCREW 2-1/2" INTO THE ROOF STRUCTURAL MEMBER/RAFTER

5/16" STAINLESS STEELUMBRELLA LAG SCREW

2-1/2" MINIMUM EMBEDMENT

COMP FLASHINGSLIP FLASHING UNDER

SHINGLE ABOVE

ROOF RAFTER (TYP.)ROOF ATTACHMENTS SHALL

BE EMBEDDED INTOROOF RAFTERS OR OTHER

STRUCTURAL MEMBERS

ROOF SHEATHING, UNDERLAYMENT,AND ROOFING MATERIAL (TYP.)

ROOF DECKING

ROOFING MATERIAL

ROOFINGMATERIAL

2-1/2" MIN. EMBEDMENTINTO STRUCTURAL MEMBER

UMBRELLA GASKET(SHADED GRAY)

COMP FLASHING(HATCHED)

COMP FLASHING

RAFTER

ROOF SHEATHING

ROOFINGMATERIAL

FLASHING SHOULD EXTENDTO END OF SHINGLE COURSE

FLASHTRACK COMP5/16" UMBRELLA LAG SCREW

FLASHTRACK COMP

FLASHTRACK COMP

FLASH TRACK SHOULD BE ORIENTED NO MORETHAN 3 DEGREES FROM PARALLEL TO RAFTER

DETAIL A

A

DESCRIPTION:PART NUMBER:SCALE:

DESIGNER:

APPROVED BY:

REVISION:

Sunrun South LLC

595 MARKET STREET, 29TH FLOOR ● SAN FRANCISCO, CA 94105 USA

PHONE (415) 580-6900 ● FAX (415) 580-6902

THE INFORMATION IN THIS DRAWING IS CONFIDENTIAL AND PROPRIETARY. ANY

REPRODUCTION, DISCLOSURE, OR USE THEREOF IS PROHIBITED WITHOUT THE


SYSTEM DETAIL, RIDGE EXTENSION

HARDWARE

SD-00709


REV

DATE:

NTS

8/22/2017

DRAFTER:B.Peterson

G.McPheeters

G.McPheeters


BDP

SNAPNRACK RIDGE EXTENSION DETAILS

TORQUE ALL HARDWARE TO THE

FOLLOWING VALUES:

12-14 FT-LBS

*FOR HANWHA, MOUNT CLAMP BOLT: 16

FT-LBS

FOR UNEVEN ROOF SURFACES, EACH

MOUINT HAS 1" OF LEVLEING CAPABILITY

IN 1/12" INCREMENTS

H TRACK CAN BE SECURED IN ANY

POSITION ON THE FLASH TRACK, BUT

BOTH CHANNEL NUTS MUST BE FULLY

ENGAGED IN THE FLASH TRACK

LEVELER CAN BE SECURED IN ANY

POSITION ALONG THE SIDE CHANNELS OF

THE H TRACK

**RIDGE EXTENSION MOUNT CLAMP BOLT

ONLY CLAMPS THE MODULE BELOW. NO

MODULE PLACED UPSLOPE OF RIDGE

EXTENSION.

MIN 5.0 INCHES

END OF FLASHING

TO RDIGE

SNAPNRACK A MOUNT

SNAPNRACK B MOUNT

SNAPNRACK

RIDGE EXTENSION

LEVELER

LEVELER BOLT

MOUNT CLAMP BOLT**

MODULE

H TRACK

ROCK-IN/DROP-IN CHANNEL NUT (2)

MODULE

H TRACK

LEVLER

SPACER, TO BE REMOVED

WHEN C LINK FALLS ON MOUNT

FLASHING

FLASH TRACK

A

ROW LINK 3D VIEW ROW LINK SIDE VIEW

DETAIL A


APPROVED BY:

REVISION:


PHONE (415) 580-6900 ● FAX (415) 580-6902



SYSTEM OVERVIEW, ROW LINKSD-00713

A 5/9/2018 NEW ITEM

REV

ADATE:

DNS


G.McPheeters

G.Viscuso


GTV

A

SNAPNRACK RL SOLAR MOUNTING SOLUTION INSTALLED ON A COMPOSITION SHINGLE ROOF MINIMIZE ROOF ATTACHMENTS ON STAGGERED ARRAYS BY USING A ROW LINK TO SUPPORT THE MODULE CANTILEVER INSTEAD OF A ROOF MOUNT CONSTRUCT A ROW LINK FROM A SNAPNRACK B MOUNT REQUIREMENTS:1) ROW LINK(S) SHALL OCCUR WITHIN 1" TO 6" FROM THE NEAREST ADJACENT MODULE PANEL EDGE.2) A ROW LINK SHALL ONLY OCCUR BETWEEN TWO ROOFATTACHMENTS IN THE SAME ROW.3) ROOF ATTACHMENT SPACING (RL SYSTEM SPACING TABLES) SHALL NOT BE EXCEEDED WITH THE USE OF ROW LINKS.4) A MAXIMUM OF (2) ROOF ATTACHMENTS PER MODULE MAY BE REPLACED WITH ROW LINK(S).

STANDARD MODULE (TYP.)

ROCK-INCHANNEL NUT

ROW LINK

ROW LINK SHALL OCCURWITHIN 1" TO 6" FROMTHE NEAREST ADJACENTMODULE PANEL EDGE.

SNAPNRACK B MOUNT.ROW LINK SHALL

ONLY OCCURBETWEEN TWO ROOF

ATTACHMENTS INTHE SAME ROW.

SNAPNRACK B MOUNT

SUPPORT SPACING (DISTANCEBETWEEN ROOF ATTACHMENTS).SEE APPROPRIATE ENGINEERINGTABLES FOR MAXIMUM SUPPORT

SPACING.

SNAPNRACK C LINK

SNAPNRACK A MOUNT

SNAPNRACK B MOUNT

SNAPNRACK FLASHTRACK COMP

ROW LINK

may 12, 2018 re: engineering certification for the snapnrack rl … · 2019. 7. 12. · may 12,...

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