conventional roof framing class exercise 1 - 30 0 residential studies certificate iv 2182d

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Conventional Roof Framing Class Exercise 1 - 30 0 Residential Studies Certificate IV 2182D

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Conventional Roof Framing Class Exercise 1 - 30 0 Residential Studies Certificate IV 2182D. Using the Floor Plan & Details provided complete the Preliminary Calculations so that the most economical Size, Span and Spacing Of the Ceiling and Roof members can be achieved. - PowerPoint PPT Presentation

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Conventional Roof Framing 

Class Exercise 1 - 300

   

   

Residential Studies Certificate IV2182D

Using the Floor Plan & Details provided

complete the Preliminary Calculations

so that the most economical Size, Span and Spacing

Of the Ceiling and Roof members can be achieved.

0.450 3.500 0.090 2.4000.090

1.8000.090

6.430 0.240

14.640

1.500

0.240

3.500 0.0

900.9

100.0

902.500

0.240

0.240

3.500

0.090

2.400

0.240

0.450 2.5000.0902.500

0.090 0.090 0.0903.690 0.240

3.500

0.450

0.240

7.57

0

1.800 3.540

Bed 2

W1 W2 W3 D1 W4 W5

W6W7W8W9

Bed 1 Bed 3Entry

Family

Living

DiningKitchenL'dryBath &

W.C.

Direction of Ceiling Joists

Chan

ge in

di

rectio

n of

Ceili

ng

Joists

John BridgesAugust 2004NTS

D2

D3D4D5

D6

D7 D8

Note: Hyspan LVL Strutting Beams to Living/Family & Living/Dining rooms as shown

0.450 3.500 0.090 2.4000.090

1.8000.090

6.430 0.240

14.640

1.500

0.240

3.500 0.0

900.9

100.0

902.500

0.240

0.240

3.500

0.090

2.400

0.240

0.450 2.5000.0902.500

0.090 0.090 0.0903.690 0.240

3.500

0.450

0.240

7.57

0

1.800 3.540

Bed 2

W1 W2 W3 D1 W4 W5

W6W7W8W9

Bed 1 Bed 3Entry

Family

Living

DiningKitchenL'dryBath &

W.C.

Direction of Ceiling Joists

Chan

ge in

dir

ection

of

Ceili

ng

Joists

John BridgesAugust 2004NTS

D2

D3D4D5

D6

D7 D8

Floor Plan Class Exercise 1

Preliminary CalculationsCommon Rafter

True Length of Common Rafter Pitch 300

300

Half Span 3.635

Rise 2.099

Half Span = 7.570 – 0.150 2= 3.635m

Rise = 30 Tan x 3.635 = 2.099m

TLCR = 4.197

TLCR = 3.635 30cos

= 4.197m

Calculate Common Rafter Span - RLW

4.197

RLW = 4.197 2

= 2.098m

2.098

2.098

RLW = 2.098m Say 2.100m

Calculate Eaves Overhang – Eaves RLW

0.150 0.450

TL O/Hang = 0.450 + 0.150 COS 30

= 0.693m

0.693m

RLW Eaves = 0.693m

Calculate Fan Struts

2.098

2.098

0.693

Strut =

2.1

Strut = Tan30 x 2.098 = 1.211

1.211Strut

Calculate Fan Strut Length

1.211

1.211 1.211

Fan Strut = 1.2112 + 1.2112

= 1.713m

or

= 1.211 cos 45

= 1.713m

1.713 1.713

Half Spread Fan Strut = 1.211m

Fan Strut Length = 1.713m

Calculate Distance X.

2.098

2.098

0.693

Distance X is the distanceFrom the inside of the plate to the centre of the underpurlin.

The Formula is Run of rafter divided by 2 minus the width of the wall plate

Run of rafter = 3.635

3.635 / 2 = 1.818

1.818 – 90 = 1728

Summary:

Rafter Span = 2.098 Say 2.100

RLW Underpurlin = 2.1

Eaves Overhang = 0.693

Distance X = 1.728

Half spread of the fan strut = 1.211

Full spread of the fan strut = 2.422

Length of strut = 1.713

Using the information from the Preliminary Calculations&

The Job Specification

Fill in the Project job sheets to arrive at final design requirements.

Member Rule/Table Size CommentsTimber Species

Timber Grade

Supp. No.

Roof Mass

Type/Construct.

Floor to Ceiling height

Eaves Width

Fill in comments column with information from project specification

General Information from Project Details

Member Rule/Table Size CommentsTimber Species

Timber Grade

Supp. No.

Roof Mass

Type/Construct.

Floor to Ceiling height

Eaves Width

Seasoned S/Wood

Fill in comments column with information from project specification

General Information from Project Details

Member Rule/Table Size CommentsTimber Species

Timber Grade

Supp. No.

Roof Mass

Type/Construct.

Floor to Ceiling height

Eaves Width

Seasoned S/Wood

Fill in comments column with information from project specification

MGP 15

General Information from Project Details

Member Rule/Table Size CommentsTimber Species

Timber Grade

Supp. No.

Roof Mass

Type/Construct.

Floor to Ceiling height

Eaves Width

Seasoned S/Wood

Fill in comments column with information from project specification

MGP 15

6 – N3

General Information from Project Details

Member Rule/Table Size CommentsTimber Species

Timber Grade

Supp. No.

Roof Mass

Type/Construct.

Floor to Ceiling height

Eaves Width

Seasoned S/Wood

Fill in comments column with information from project specification

MGP 15

6 – N3

10Kg/m2

General Information from Project Details

Member Rule/Table Size CommentsTimber Species

Timber Grade

Supp. No.

Roof Mass

Type/Construct.

Floor to Ceiling height

Eaves Width

Seasoned S/Wood

Fill in comments column with information from project specification

MGP 15

6 – N3

10Kg/m2

Conventional

General Information from Project Details

Member Rule/Table Size CommentsTimber Species

Timber Grade

Supp. No.

Roof Mass

Type/Construct.

Floor to Ceiling height

Eaves Width

Seasoned S/Wood

Fill in comments column with information from project specification

MGP 15

6 – N3

10Kg/m2

Conventional

2.700

General Information from Project Details

Member Rule/Table Size CommentsTimber Species

Timber Grade

Supp. No.

Roof Mass

Type/Construct.

Floor to Ceiling height

Eaves Width

Seasoned S/Wood

Fill in comments column with information from project specification

MGP 15

6 – N3

10Kg/m2

Conventional

2.700

0.450

General Information from Project Details

Using A.S. 1684.2 (2006) – Section 7 Roof Framing

1. Obtain information for Ceiling Joists to complete job sheet.

Member Rule/Table Size Comments

Ceiling Joists R

T

R

90 x 35

Single Span

Continuous Span (over more than 1 span)

1. Page 81 – rule 7.2.4 ceiling joists (building practice)

7.2.4

2. Page 98 – rule 7.3.6 ceiling joists (member sizes)

7.3.6

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

Using A.S. 1684.2 (2006) – Section 7 Roof Framing

1. Obtain information for Ceiling Joists to complete job sheet.

Member Rule/Table Size Comments

Ceiling Joists R

T

R

90 x 351200c/c

Single Span

Continuous Span (over more than 1 span)

1. Page 81 – rule 7.2.4 ceiling joists (building practice)

7.2.4

2. Page 98 – rule 7.3.6 ceiling joists (member sizes)

7.3.6

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

21

4. Find allowable spans for 90 x 35 MGP15 ceiling joists from table 21 supp. 6

Using A.S. 1684.2 (2006) – Section 7 Roof Framing

1. Obtain information for Ceiling Joists to complete job sheet.

Member Rule/Table Size Comments

Ceiling Joists R

T

R

90 x 351200c/c

Single Span

Continuous Span (over more than 1 span)

1. Page 81 – rule 7.2.4 ceiling joists (building practice)

7.2.4

2. Page 98 – rule 7.3.6 ceiling joists (member sizes)

7.3.6

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

21

4. Find allowable spans for 90 x 35 MGP15 ceiling joists from table 21 supp. 6

2.400

Using A.S. 1684.2 (2006) – Section 7 Roof Framing

1. Obtain information for Ceiling Joists to complete job sheet.

Member Rule/Table Size Comments

Ceiling Joists R

T

R

90 x 351200c/c

Single Span

Continuous Span (over more than 1 span)

1. Page 81 – rule 7.2.4 ceiling joists (building practice)

7.2.4

2. Page 98 – rule 7.3.6 ceiling joists (member sizes)

7.3.6

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

21

4. Find allowable spans for 90 x 35 MGP15 ceiling joists from table 21 supp. 6

2.400

2.800

2. Obtain information for Hanging Beams

Member Rule/Table Size CommentsRoom Span CLW

Hanging Beams R

T

R

Bedroom 1Bedroom 2Bedroom 3Bath / WCLaundryKitchenDiningFamilyLivingEntry

1. Page 82 – rule 7.2.5 Hanging Beams (building practice)

7.2.5

2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)

7.3.7

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

2. Obtain information for Hanging Beams

Member Rule/Table Size CommentsRoom Span CLW

Hanging Beams R

T

R

Bedroom 1Bedroom 2Bedroom 3Bath / WCLaundryKitchenDiningFamilyLivingEntry

1. Page 82 – rule 7.2.5 Hanging Beams (building practice)

7.2.5

2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)

7.3.7

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

23

4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15

2. Obtain information for Hanging Beams

Member Rule/Table Size CommentsRoom Span CLW

Hanging Beams R

T

R

Bedroom 1Bedroom 2Bedroom 3Bath / WCLaundryKitchenDiningFamilyLivingEntry

1. Page 82 – rule 7.2.5 Hanging Beams (building practice)

7.2.5

2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)

7.3.7

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

23

4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15

3.500 1.750

2. Obtain information for Hanging Beams

Member Rule/Table Size CommentsRoom Span CLW

Hanging Beams R

T

R

140 x 35 Bedroom 1Bedroom 2Bedroom 3Bath / WCLaundryKitchenDiningFamilyLivingEntry

1. Page 82 – rule 7.2.5 Hanging Beams (building practice)

7.2.5

2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)

7.3.7

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

23

4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15

3.500 1.750

2. Obtain information for Hanging Beams

Member Rule/Table Size CommentsRoom Span CLW

Hanging Beams R

T

R

140 x 35 Bedroom 1Bedroom 2 3.500 1.250Bedroom 3Bath / WCLaundryKitchenDiningFamilyLivingEntry

1. Page 82 – rule 7.2.5 Hanging Beams (building practice)

7.2.5

2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)

7.3.7

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

23

4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15

3.500 1.750

2. Obtain information for Hanging Beams

Member Rule/Table Size CommentsRoom Span CLW

Hanging Beams R

T

R

140 x 35140 x 35

Bedroom 1Bedroom 2 3.500 1.250Bedroom 3Bath / WCLaundryKitchenDiningFamilyLivingEntry

1. Page 82 – rule 7.2.5 Hanging Beams (building practice)

7.2.5

2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)

7.3.7

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

23

4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15

3.500 1.750

2. Obtain information for Hanging Beams

Member Rule/Table Size CommentsRoom Span CLW

Hanging Beams R

T

R

140 x 35140 x 35

Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WCLaundryKitchenDiningFamilyLivingEntry

1. Page 82 – rule 7.2.5 Hanging Beams (building practice)

7.2.5

2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)

7.3.7

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

23

4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15

3.500 1.750

2. Obtain information for Hanging Beams

Member Rule/Table Size CommentsRoom Span CLW

Hanging Beams R

T

R

140 x 35140 x 35 90 x 35

Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WCLaundryKitchenDiningFamilyLivingEntry

1. Page 82 – rule 7.2.5 Hanging Beams (building practice)

7.2.5

2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)

7.3.7

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

23

4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15

3.500 1.750

2. Obtain information for Hanging Beams

Member Rule/Table Size CommentsRoom Span CLW

Hanging Beams R

T

R

140 x 35140 x 35 90 x 35________

Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WC NALaundryKitchenDiningFamilyLivingEntry

1. Page 82 – rule 7.2.5 Hanging Beams (building practice)

7.2.5

2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)

7.3.7

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

23

4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15

3.500 1.750

2. Obtain information for Hanging Beams

Member Rule/Table Size CommentsRoom Span CLW

Hanging Beams R

T

R

140 x 35140 x 35 90 x 35________________

Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WC NALaundry NAKitchenDiningFamilyLivingEntry

1. Page 82 – rule 7.2.5 Hanging Beams (building practice)

7.2.5

2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)

7.3.7

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

23

4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15

3.500 1.750

2. Obtain information for Hanging Beams

Member Rule/Table Size CommentsRoom Span CLW

Hanging Beams R

T

R

140 x 35140 x 35 90 x 35________________

Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WC NALaundry NAKitchen 3.540 1.750DiningFamilyLivingEntry

1. Page 82 – rule 7.2.5 Hanging Beams (building practice)

7.2.5

2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)

7.3.7

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

23

4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15

3.500 1.750

2. Obtain information for Hanging Beams

Member Rule/Table Size CommentsRoom Span CLW

Hanging Beams R

T

R

140 x 35140 x 35 90 x 35________________140 x 35

Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WC NALaundry NAKitchen 3.540 1.750DiningFamilyLivingEntry

1. Page 82 – rule 7.2.5 Hanging Beams (building practice)

7.2.5

2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)

7.3.7

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

23

4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15

3.500 1.750

2. Obtain information for Hanging Beams

Member Rule/Table Size CommentsRoom Span CLW

Hanging Beams R

T

R

140 x 35140 x 35 90 x 35________________140 x 35

Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WC NALaundry NAKitchen 3.540 1.750Dining 3.690 1.750FamilyLivingEntry

1. Page 82 – rule 7.2.5 Hanging Beams (building practice)

7.2.5

2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)

7.3.7

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

23

4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15

3.500 1.750

2. Obtain information for Hanging Beams

Member Rule/Table Size CommentsRoom Span CLW

Hanging Beams R

T

R

140 x 35140 x 35 90 x 35________________140 x 35140 x 35

Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WC NALaundry NAKitchen 3.540 1.750Dining 3.690 1.750FamilyLivingEntry

1. Page 82 – rule 7.2.5 Hanging Beams (building practice)

7.2.5

2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)

7.3.7

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

23

4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15

3.500 1.750

2. Obtain information for Hanging Beams

Member Rule/Table Size CommentsRoom Span CLW

Hanging Beams R

T

R

140 x 35140 x 35 90 x 35________________140 x 35140 x 35

Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WC NALaundry NAKitchen 3.540 1.750Dining 3.690 1.750Family 2.740 1.750LivingEntry

1. Page 82 – rule 7.2.5 Hanging Beams (building practice)

7.2.5

2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)

7.3.7

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

23

4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15

3.500 1.750

2. Obtain information for Hanging Beams

Member Rule/Table Size CommentsRoom Span CLW

Hanging Beams R

T

R

140 x 35140 x 35 90 x 35________________140 x 35140 x 35120 x 35

Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WC NALaundry NAKitchen 3.540 1.750Dining 3.690 1.750Family 2.740 1.750LivingEntry

1. Page 82 – rule 7.2.5 Hanging Beams (building practice)

7.2.5

2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)

7.3.7

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

23

4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15

3.500 1.750

2. Obtain information for Hanging Beams

Member Rule/Table Size CommentsRoom Span CLW

Hanging Beams R

T

R

140 x 35140 x 35 90 x 35________________140 x 35140 x 35120 x 35

Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WC NALaundry NAKitchen 3.540 1.750Dining 3.690 1.750Family 2.740 1.750Living 3.690 1.750Entry

1. Page 82 – rule 7.2.5 Hanging Beams (building practice)

7.2.5

2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)

7.3.7

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

23

4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15

3.500 1.750

2. Obtain information for Hanging Beams

Member Rule/Table Size CommentsRoom Span CLW

Hanging Beams R

T

R

140 x 35140 x 35 90 x 35________________140 x 35140 x 35120 x 35140 x 35

Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WC NALaundry NAKitchen 3.540 1.750Dining 3.690 1.750Family 2.740 1.750Living 3.690 1.750Entry

1. Page 82 – rule 7.2.5 Hanging Beams (building practice)

7.2.5

2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)

7.3.7

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

23

4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15

3.500 1.750

2. Obtain information for Hanging Beams

Member Rule/Table Size CommentsRoom Span CLW

Hanging Beams R

T

R

140 x 35140 x 35 90 x 35________________140 x 35140 x 35120 x 35140 x 35________

Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WC NALaundry NAKitchen 3.540 1.750Dining 3.690 1.750Family 2.740 1.750Living 3.690 1.750Entry NA

1. Page 82 – rule 7.2.5 Hanging Beams (building practice)

7.2.5

2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)

7.3.7

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

23

4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15

3.500 1.750

3. Obtain information for Rafters

Member Rule/Table Size Comments

Common Rafter R

T

R

Rafter Spacing

RLW

Eaves O/Hang

Underpurlin is mid-span of Rafter

Fill in comments column with information from project specification & Prelim. Calcs.1. Page 86 – rule 7.2.11 Rafters(building practice)

7.2.11

2. Page 105 – rule 7.3.13 Rafters (member sizes)

7.3.13

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

3. Obtain information for Rafters

Member Rule/Table Size Comments

Common Rafter R

T

R

Rafter Spacing

RLW

Eaves O/Hang

Underpurlin is mid-span of Rafter

Fill in comments column with information from project specification & Prelim. Calcs.1. Page 86 – rule 7.2.11 Rafters(building practice)

7.2.11

2. Page 105 – rule 7.3.13 Rafters (member sizes)

7.3.13

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

29

4. Determine Rafter Size from table 29 supp. 6, MGP15, N3(Check - single or continuous span - roof mass – span – O/hang)

3. Obtain information for Rafters

Member Rule/Table Size Comments

Common Rafter R

T

R

Rafter Spacing

RLW

Eaves O/Hang

Underpurlin is mid-span of Rafter

Fill in comments column with information from project specification & Prelim. Calcs.

1.200

1. Page 86 – rule 7.2.11 Rafters(building practice)

7.2.11

2. Page 105 – rule 7.3.13 Rafters (member sizes)

7.3.13

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

29

4. Determine Rafter Size from table 29 supp. 6, MGP15, N3(Check - single or continuous span - roof mass – span – O/hang)

3. Obtain information for Rafters

Member Rule/Table Size Comments

Common Rafter R

T

R

Rafter Spacing

RLW

Eaves O/Hang

Underpurlin is mid-span of Rafter

Fill in comments column with information from project specification & Prelim. Calcs.

1.200

2.100

1. Page 86 – rule 7.2.11 Rafters(building practice)

7.2.11

2. Page 105 – rule 7.3.13 Rafters (member sizes)

7.3.13

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

29

4. Determine Rafter Size from table 29 supp. 6, MGP15, N3(Check - single or continuous span - roof mass – span – O/hang)

3. Obtain information for Rafters

Member Rule/Table Size Comments

Common Rafter R

T

R

Rafter Spacing

RLW

Eaves O/Hang

Underpurlin is mid-span of Rafter

Fill in comments column with information from project specification & Prelim. Calcs.

1.200

2.100

0.693

1. Page 86 – rule 7.2.11 Rafters(building practice)

7.2.11

2. Page 105 – rule 7.3.13 Rafters (member sizes)

7.3.13

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

29

4. Determine Rafter Size from table 29 supp. 6, MGP15, N3(Check - single or continuous span - roof mass – span – O/hang)

3. Obtain information for Rafters

Member Rule/Table Size Comments

Common Rafter R

T

R

Rafter Spacing

RLW

Eaves O/Hang

Underpurlin is mid-span of Rafter

Fill in comments column with information from project specification & Prelim. Calcs.

1.200

2.100

0.693

1. Page 86 – rule 7.2.11 Rafters(building practice)

7.2.11

2. Page 105 – rule 7.3.13 Rafters (member sizes)

7.3.13

3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)

29

4. Determine Rafter Size from table 29 supp. 6, MGP15, N3(Check - single or continuous span - roof mass – span – O/hang)

140 x 45

4. Obtain information for Collar Ties

Member Rule/Table Size Comments

Collar Ties R

Tor

Length

Check section 7 (Roof Framing) for information – rules & tables for Collar TiesNote: Find rules relating to Collar Ties.

Page 90 Rule 7.2.16 & Page 109, Rule 7.3.17 – Other members or Components, states that Table 7.6 give details for miscellaneous roof framing members not given in span tables of the supplements.

7.2.16 &7.3.17

4. Obtain information for Collar Ties

Member Rule/Table Size Comments

Collar Ties R

Tor

Length

Check section 7 (Roof Framing) for information – rules & tables for Collar TiesNote: Find rules relating to Collar Ties.

Page 90 Rule 7.2.16 & Page 109, Rule 7.3.17 – Other members or Components, states that Table 7.6 give details for miscellaneous roof framing members not given in span tables of the supplements.

7.2.16 &7.3.17

Page 110, Table 7.6 – Collar Ties gives required Information

7.6 (page 110)

4. Obtain information for Collar Ties

Member Rule/Table Size Comments

Collar Ties R

Tor

Length

Check section 7 (Roof Framing) for information – rules & tables for Collar TiesNote: Find rules relating to Collar Ties.

Page 90 Rule 7.2.16 & Page 109, Rule 7.3.17 – Other members or Components, states that Table 7.6 give details for miscellaneous roof framing members not given in span tables of the supplements.

7.2.16 &7.3.17

Page 110, Table 7.6 – Collar Ties gives required Information

7.6 (page 110)

Refer to floor plan to calculate length of collar tie: 7.270 / 2 = 3.635

3.635

4. Obtain information for Collar Ties

Member Rule/Table Size Comments

Collar Ties R

T

70 x 35 Length

Check section 7 (Roof Framing) for information – rules & tables for Collar TiesNote: Find rules relating to Collar Ties.

Page 90 Rule 7.2.16 & Page 109, Rule 7.3.17 – Other members or Components, states that Table 7.6 give details for miscellaneous roof framing members not given in span tables of the supplements.

7.2.16 &7.3.17

Page 110, Table 7.6 – Collar Ties gives required Information

7.6 (page 110)

Refer to floor plan to calculate length of collar tie: 7.270 / 2 = 3.635

3.635

5. Obtain information for Ridge board

Member Rule/Table Size Comments

Ridge R

T

Not Strutted

Check section 7 (Roof Framing) for information – rules & tables for Ridge boardsNote: Find rules relating to Ridge boards

7.2.12

5. Obtain information for Ridge board

Member Rule/Table Size Comments

Ridge R

T

Not Strutted

Check section 7 (Roof Framing) for information – rules & tables for Ridge boardsNote: Find rules relating to Ridge boards

Page 86, Rule 7.2.12 – The size of Ridge boards shall be determined from Table 7.6

7.2.12

7.6 (page 110)

Table 7.6 Ridge boards – Refers to Unstrutted ridges in coupled roofs has having a depth not less than length of Rafter Plumb-Cut x 19mm thick

Rafter 140 x 45 MGP 15 Seasoned Softwood

Ridge

0.140

Length of Plumb Cut

Length of Plumb cut = Rafter Depth Cos. Roof Pitch

= 0.140 Cos. 300

= 0.162

0.16

2

Refer Table 7.6 (AS 1684.2) page 110, Ridge depth = rafter plumb cut x 19mm thick.

Therefore use 170 x 19 MGP 15 S/wood.

5. Obtain information for Ridge board

Member Rule/Table Size Comments

Ridge R

T

Not Strutted

Check section 7 (Roof Framing) for information – rules & tables for Ridge boardsNote: Find rules relating to Ridge boards

Page 86, Rule 7.2.12 – The size of Ridge boards shall be determined from Table 7.6

7.2.12

7.6 (page 110)

Table 7.6 Ridge boards – Refers to Unstrutted ridges in coupled roofs has having a depth not less than length of Rafter Plumb-Cut x 19mm thick

Calculate Rafter Plumb-Cut Length - 0.140 = 0.162 (Therefore 170 x 19 Ridge)cos 30

170 x 19

6. Obtain information for Hip Rafter (Hip)

Member Rule/Table Size Comments

Hip Rafter R

R

T

Check section 7 (Roof Framing) for information – rules & tables for Hip RaftersNote: Find rules relating to Hip rafters

Page 87, Rule 7.2.13 – Hip & Valley Rafters

7.2.13

7.3.17

)

6. Obtain information for Hip Rafter (Hip)

Member Rule/Table Size Comments

Hip Rafter R

R

T

Check section 7 (Roof Framing) for information – rules & tables for Hip RaftersNote: Find rules relating to Hip rafters

Page 87, Rule 7.2.13 – Hip & Valley Rafters Page 109, Rule 7.3.17 - The size of Miscellaneous roof members

shall be determined from Table 7.6

7.2.13

7.3.17

7.6 (Page 110)

Table 7.6 - states that hips should be 50mm greater In depth than rafters x 19 thick (seasoned) for stress grades F11/ MGP15 min. No less than rafter stress grade.

6. Obtain information for Hip Rafter (Hip)

Member Rule/Table Size Comments

Hip Rafter R

R

T

Check section 7 (Roof Framing) for information – rules & tables for Hip RaftersNote: Find rules relating to Hip rafters

Page 87, Rule 7.2.13 – Hip & Valley Rafters Page 109, Rule 7.3.17 - The size of Miscellaneous roof members

shall be determined from Table 7.6

7.2.13

7.3.17

7.6 (Page 110)

Table 7.6 - states that hips should be 50mm greater In depth than rafters x 19 thick (seasoned) for stress grades F11/ MGP15 min. No less than rafter stress grade.

Use 190 x 19 Hip Rafters (140 + 50 = 190)

190 x 19

7. Obtain information for Under purlins

Member Rule/Table Size Comments

Underpurlin R

R

T

140 x 70

Span Direct from Span Tables of Supplements.

Max. Span =

Check section 7 (Roof Framing) for information – rules & tables for UnderpurlinsNote: Find rules relating to Underpurlins

Page 84, Rule 7.2.10 – Underpurlins

7.2.10

7.3.12

7. Obtain information for Under purlins

Member Rule/Table Size Comments

Underpurlin R

R

T

140 x 70

Span Direct from Span Tables of Supplements.

Max. Span =

Check section 7 (Roof Framing) for information – rules & tables for UnderpurlinsNote: Find rules relating to Underpurlins

Page 84, Rule 7.2.10 – UnderpurlinsPage 104, Rule 7.3.12 - Size of Underpurlins Span Table 28 of Supplements

7.2.10

7.3.12

28

Refer Table 28 – Continuous Span - for allowable span to Underpurlin (Rafter spacing = 1200, RLW = 2100 & Roof Mass = 10Kg/m2)

Determine allowable Max. Span for Underpurlin size 140 x 70 from Table 28

We must interpolate between a RLW of 1800 & 2700 Continuous Span

1800 2100 2700

5600 ? 4600

We must interpolate between a RLW of 1800 & 2700

1800 2100 2700

5600 ? 4600

300/900 = x/1000

We must interpolate between a RLW of 1800 & 2700

1800 2100 2700

4900 ? 4300

300/900 = x/600

X = 333 ? = 4567

7. Obtain information for Under purlins

Member Rule/Table Size Comments

Underpurlin R

R

T

140 x 70

Span Direct from Span Tables of Supplements.

Max. Span =

Check section 7 (Roof Framing) for information – rules & tables for UnderpurlinsNote: Find rules relating to Underpurlins

Page 84, Rule 7.2.10 – UnderpurlinsPage 104, Rule 7.3.12 - Size of Underpurlins Span Table 28 of Supplements

7.2.10

7.3.12

28

Refer Table 28 – Continuous Span - for allowable span to Underpurlin (Rafter spacing = 1200, RLW = 2100 & Roof Mass = 10Kg/m2)

Determine allowable Max. Span for Underpurlin size 140 x 70 from Table 28

4.567m

8. Obtain information for Struts (Roof Strutting)

Member Rule/Table Size Comments

Struts R

R

T

or

Straight Strut Length =

Fan Strut Length =

Check section 7 (Roof Framing) for information – rules & tables for Struts

Note: Find rules relating to Struts

Page 87, Rule 7.2.15 – Roof Strutting & Page 90, Rule 7.2.15.3 Fan Struts.

7.2.15

7.2.15.3

From Prelim. Calcs. Fill in lengths for straight & fan struts.

8. Obtain information for Struts (Roof Strutting)

Member Rule/Table Size Comments

Struts R

R

T

or

Straight Strut Length =

Fan Strut Length =

Check section 7 (Roof Framing) for information – rules & tables for Struts

Note: Find rules relating to Struts

Page 87, Rule 7.2.15 – Roof Strutting & Page 90, Rule 7.2.15.3 Fan Struts.Page 109, Rule 7.3.17 - The size of Miscellaneous roof members

shall be determined from Table 7.6

7.2.15

7.2.15.3

7.6

From Prelim. Calcs. Fill in lengths for straight & fan struts.

Using Table 7.6 Determine section size of Struts – (Sheet Roof)

8. Obtain information for Struts (Roof Strutting)

Member Rule/Table Size Comments

Struts R

R

T

or

Straight Strut Length =

Fan Strut Length =

Check section 7 (Roof Framing) for information – rules & tables for Struts

Note: Find rules relating to Struts

Page 87, Rule 7.2.15 – Roof Strutting & Page 90, Rule 7.2.15.3 Fan Struts.Page 109, Rule 7.3.17 - The size of Miscellaneous roof members

shall be determined from Table 7.6

7.2.15

7.2.15.3

7.6

From Prelim. Calcs. Fill in lengths for straight & fan struts.

1.211m

1.713m

Using Table 7.6 Determine section size of Struts – (Sheet Roof)

8. Obtain information for Struts (Roof Strutting)

Member Rule/Table Size Comments

Struts R

R

T

Straight Strut Length =

Fan Strut Length =

Check section 7 (Roof Framing) for information – rules & tables for Struts

Note: Find rules relating to Struts

Page 87, Rule 7.2.15 – Roof Strutting & Page 90, Rule 7.2.15.3 Fan Struts.Page 109, Rule 7.3.17 - The size of Miscellaneous roof members

shall be determined from Table 7.6

7.2.15

7.2.15.3

7.6

From Prelim. Calcs. Fill in lengths for straight & fan struts.

1.211m

1.713m

Using Table 7.6 Determine section size of Struts – (Sheet Roof)

90 x 45

2/90x45

9. Obtain information for Strutting Beams

Member Rule/Table Size Comments

Strutting Beams

•Supporting roof & Ceiling Loads.

•Use: Hyspan LVL Location Span Spacing

Living/Dining

Living/Family

• Use Hyspan LVL Span Tables for Residential Building

• Calculate spans for strutting beams from floor plan

0.450 3.500 0.090 2.4000.090

1.8000.090

6.430 0.240

14.640

1.500

0.240

3.500 0.0

900.9

100.0

902.500

0.240

0.240

3.500

0.090

2.400

0.240

0.450 2.5000.0902.500

0.090 0.090 0.0903.690 0.240

3.500

0.450

0.240

7.57

0

1.800 3.540

Bed 2

W1 W2 W3 D1 W4 W5

W6W7W8W9

Bed 1 Bed 3Entry

Family

Living

DiningKitchenL'dryBath &

W.C.

Direction of Ceiling Joists

Chan

ge in

dir

ection

of

Ceili

ng

Joists

John BridgesAugust 2004NTS

D2

D3D4D5

D6

D7 D8

Beam to Living/Dining span = 3.690Beam to Living/Family span = 3.500

Floor Plan Class Exercise 1

8. Obtain information for Strutting Beams

Member Rule/Table Size Comments

Strutting Beams

•Supporting roof & Ceiling Loads.

•Use: Hyspan LVL Location Span Spacing

Living/Dining

Living/Family

• Use Hyspan LVL Span Tables for Residential Building

• Calculate spans for strutting beams from floor plan

• Fill in span information

3.690

3.500

• Spacing as per plan

Centre

Off Centre3.690 / 2.740

• Determine table numbers from Hyspan LVL tables to select beam section sizes

Use table 17 for BeamTo Living/Dining -Span = 3.690

Supporting Underpurlins& Ceiling Joists

Go to Table 17 for member size

RLW = 2.100

Span = 3.690

Beam Size= 170 x 63

8. Obtain information for Strutting Beams

Member Rule/Table Size Comments

Strutting Beams

•Supporting roof & Ceiling Loads.

•Use: Hyspan LVL Location Span Spacing

Living/Dining

Living/Family

• Use Hyspan LVL Span Tables for Residential Building

• Calculate spans for strutting beams from floor plan

• Fill in span information

3.690

3.500

• Spacing is centre of rooms

Centre

Off Centre3.690 / 2.740

• Determine table numbers from Hyspan LVL tables to select beam section sizes

• Fill in Data for Living/Dining Beam

T 17 170 x 63

Use table 18 for BeamTo Living/Family -Span = 3.500

Supporting Underpurlins& Hanging Beams

Go to Table 18for member size

RLW = 3.215

Span = 3.500

Beam Size= 2/170x36

8. Obtain information for Strutting Beams

Member Rule/Table Size Comments

Strutting Beams

•Supporting roof & Ceiling Loads.

•Use: Hyspan LVL Location Span Spacing

Living/Dining

Living/Family

• Use Hyspan LVL Span Tables for Residential Building

• Calculate spans for strutting beams from floor plan

• Fill in span information

3.690

3.500

• Spacing is centre of rooms

Centre

Off Centre3.215

• Determine table numbers from Hyspan LVL tables to select beam section sizes

• Fill in Data for Living/Dining Beam

T 17 170 x 63

• Fill in Data for Living/Family Beam

T 18 2/170x36

Part A can now be completed.

On the plan supplied clearly mark all Hanging Beams, Underpurlins

and any Strutting Beams & / or Special Strutting Beams supporting

Roof and Ceiling loads.

0.450 3.500 0.090 2.4000.090

1.8000.090

6.430 0.240

14.640

1.500

0.240

3.500 0.0

900.9

100.0

902.500

0.240

0.240

3.500

0.090

2.400

0.240

0.450 2.5000.0902.500

0.090 0.090 0.0903.690 0.240

3.500

0.450

0.240

7.57

0

1.800 3.540

Bed 2

W1 W2 W3 D1 W4 W5

W6W7W8W9

Bed 1 Bed 3Entry

Family

Living

DiningKitchenL'dryBath &

W.C.

Direction of Ceiling Joists

Chan

ge in

dir

ection

of

Ceili

ng

Joists

John BridgesAugust 2004NTS

D2

D3D4D5

D6

D7 D8

Strutting

Hyspan Strutting BeamsHanging Beams

Under Purlins

xxx

x x

x

x x

Class Exercise 1 – Now Complete