StandardDivisionBridge

of this standard to other for

mats or for in

correct results or da

mages resultin

g fro

m its use.

kin

d is

made by Tx

DO

T for any purpose

whatsoever. Tx

DO

T assu

mes no responsibilit

y for the conversio

n

The use of this standard is governed by the "T

exas E

ngin

eerin

g Practic

e

Act".

No

warranty of any

DIS

CL

AI

ME

R:

FILE:

DA

TE:

DN: CK: DW: CK:FILE:

JOB

COUNTY

SECT

DIST

REVISIONS

TxDOT TxDOT TxDOT TxDOT

HIGHWAY

SHEET NO.

C TxDOT

CONT

racsts02.dgn

February 2010

RETROFIT GUIDE

RAIL ANCHORAGE CURB

RAC-R

SHEET 1 OF 2

or F1554 Gr 105)

(ASTM-A193 Gr B7

Anchor Rod

" Threaded43

Flu

sh or

" Max

16

1

F1554 Gr 105)

Gr B7 or

(ASTM-A193

Anchor Rod

" Threaded43

Heavy Hex Nuts

Tack Weld

or Heavy Hex Nut

Heavy Hex Jam Nut

(ASTM-A36)

or 3" Dia,

x 3 x 3163

Plate Washer

Heavy Hex Nuts

or Heavy Hex Nut

Heavy Hex Jam Nut

" Max

43

2

" Max

43

2

anchorage details

standard for rail

See applicable rail2'-3" 2'-3"

"211'-5

Grade

Finished

2'-

0"

Max

8"

Min

Curb Types)

(typ both

at 9"

Max

Culvert

Existing

Top Slab of

of New RAC-R

Traffic side Face

and Holes

L Anchors

anchorage details

standard for rail

See applicable rail

Line

Breakback

Anchorage Curb

Top of new

Grade

Finished

Max

2'-

0"

of New RAC-R

Traffic side Face

Anchorage Curb

Top of new

"T"

1

S3(#4)

H1(#6)

3

than 8"

3

1

1

TYPICAL SECTION ~ TYPE 1

ANCHOR DETAILS

8"

3" R

Exist Sla

b

Thic

kness

Varie

s

11"

Thic

kness

Exist Sla

b

Varie

s"

43

4

Min

2"

Min

HOOKED ANCHOR

"T"

1

4

"213 6"

C

S1(#4)

H2(#4)

"C"

TYPICAL SECTION ~ TYPE 2

6

Breakback Line

Bars

H S

pa

5

Const Jt 4

1

"C"

~ Less

at 6" Max

Bars H1 Spa

8"

Min

2

2

8

STRAIGHT ANCHOR

9

9

9

9

Min

"4

13

Anchors

existing reinforcing remains in use.

new Bars D(#6), as shown in the detail, are required even when

extend existing reinforcing into new construction. Note that

be taken so as to not damage existing reinforcing. Clean and

face of the existing wingwall prior to breakback. Care must

the existing culvert. Saw cut (score) 1" deep on field side

properly align the wingwall Anchorage Curb with that placed on

height. Breakback existing wingwall as needed in order to

Retrofit Wingwall Anchorage Curb must always be 2'-0" in

side anchors transversely.

anchors at 11" maximum. Do not align field side and traffic

Space field side anchors at 36" maximum. Space traffic side

Tighten nuts snug tight.

"Concrete Structure Repair", at the Contractor's expense.

directed by the Engineer, in accordance with Item 429,

Percussion drilling is not permitted. Patch spalls, when

Core drill 1" diameter holes through existing slab.

debris prior to placing new anchorage curb.

with abrasive blasting or shot blasting. Remove all loose

retrofitted concrete curb, clean the newly exposed concrete

breaker between the exposed, existing concrete and the

to prevent existing asphalt remnants from acting as a bond

Care must be taken to not damage the existing slab. In order

to flush with top of culvert in areas of new construction.

remains in use. Remove existing overlay and/or base material

the detail, are required even when existing reinforcing

concrete construction. Note that new anchors, as shown in

Clean, bend and incorporate existing reinforcing into new

Breakback Line shown. Do not damage existing reinforcing.

After scoring, remove shaded portion of existing concrete to

slab, on the field side face of existing curb, if present.

Saw cut (score) 1" deep flush with top of existing culvert

into new concrete construction.

reinforcing. Clean existing reinforcing and incorporate

reinforcing. Replace damaged reinforcing with new, like

shown. Care must be taken so as to not damage existing

Remove shaded portion of existing concrete to Breakback Line

order to properly install the railing anchorage reinforcing.

The total thickness ("T" plus "C") must be 8" minimum in

"C" is equal to the Retrofit Rail Anchorage Curb thickness.

If "T" is less than 6", a special design will be required.

"T" is equal to the existing culvert top slab thickness.

4

5

6

7

"T"

plu

s "C

"

min

us 5"

2'-0" 2'-0"

BARS S (#4)

OPTIONAL

BARS S (#4)

"C"

min

us 5"

4"

Min

Min & Typ

5" Lap 12" Lap

Min & Typ

S1

S3

BARS L (#5)

6'-2"

1'-

1"

2"

S2

1'-

7"

Culvert

Existing

Top Slab of

(ASTM-A36)

or 3" Dia,

x 3 x 3 163

Plate Washer

anchorage curb less than 1'-2" thick.

greater in thickness. Use hooked anchors for retrofit

Use straight anchors if retrofit anchorage curb is 1'-2" or

Percussion drilling is not permitted.

special design will be required. Holes must be core drilled.

If existing parallel wingwall thickness is less than 8", a

Drill and grout Bars D(#6) 1'-0" Min into existing wingwall.

removed and the sheet sealed and signed.

added, the phrase "(Not to be used as a standard)"

required must be crossed out or eliminated, "(MOD)"

is not covered. In all cases details and notes not

may need to be amended if the exact existing condition

not be used without modification. The details shown

approach guard fence post positioning. This sheet may

providing for proper railing post anchorage and

identifying the box culvert wingwall conditions, and

be shown. Particular care should be taken in

side face of rail anchorage curb retrofit etc. should

thickness, wingwall thickness, fill height at traffic

application. Dimensions of existing culvert top slab

this guide should be prepared for the specific

railing. Details with appropriate notes taken from

retrofitting existing box culverts with traffic

This sheet is intended to be used as a guide for

GENERAL NOTES:

MATERIAL NOTES:

at 8" Max)

L(#5 Spa

2"

Cl

3"

10"

8"

2"

Sla

b

for rail anchorage details

See applicable rail standard

2'-3"4'-3" New Wingwall Curb Slab

Grade

Finished

Line

Breakback

at 12" Max)

A(#4 Spa

of New RAC-R

Traffic side Face

Em

bed

Min

at L Parallel Wingwall

L Bars D(#6) and Holes

at 1'-0" Max)

Bars D (#6 Spa

C

S2(#4)

J(#4)

7

2 E

q S

pa

Bars J

TYPICAL SECTION ~ PARALLEL WINGWALL

C

2'-

0"

1'-

0"

1'-

0"

Min

8

(NOT TO BE USED AS A STANDARD)

(CURBS 2'-0" TALL AND LESS ONLY)

BOX CULVERT RAIL MOUNTING DETAILS

"211

"2

12

"211

"2

12

"211

"2

12

Wingwall

Parallel

Culvert

Existing

Face of

Field side

Reinforcing bar dimensions shown are out-to-out of bar.

Cover dimensions are clear dimensions, unless noted otherwise.

and T224 are not required when used with the RAC-R standard.

structure). Bars RH(#5) required on standards T80HT, T80SS

(Bars L(#5) on T223 and C223 Rails are not used for this

above existing slab. Showing T223 Rail other rails similar.

Used when the top of the Retrofit Curb is less than 8"

when used with RAC-R standard.

Bars RH(#5) required on standards T80HT, T80SS and T224 are not required

similar. (Bars L(#5) on T223 and C223 Rails are not used for this structure).

Anchorage Curb on Flared and Straight Wingwalls. Showing T223 Rail, other rails

Wingwall Anchorage Curb is required on Parallel Wingwalls only. Omit Wingwall

when used with the RAC-R standard.

required on standards T80HT, T80SS and T224 are not required

and C223 Rails are not used for this structure). Bars RH(#5)

Showing T223 Rail, other rails similar. (Bars L(#5) on T223

Used when the Retrofit Curb is 8" in height or greater.

otherwise shown on plans.

Galvanize all steel components except reinforcing bars, unless

Provide Grade 60 reinforcing steel.

" unless shown otherwise.43 Chamfer all exposed corners

concrete if shown elsewhere in the plans.

Provide Class "C" concrete (f'c=3,600 psi). Provide Class "C" (HPC)

same strength requirements as indicated on this sheet.

and reinforcement arrangements are permissible if they meet the

wingwalls etc. have been shown on this sheet. Other combinations

Not all possible combinations of existing box culverts, curbs,

will be by CY of Class "C" or Class "C"(HPC) concrete.

Payment for rail anchorage curb (including wingwall curb slab)

require special design.

maximum height of 2'-0" only. Curb heights greater than 2'-0" will

the finished grade. These details are for use with curbs with a

For vehicle safety, the top of the new curb must be flush with

notes and details not shown.

See appropriate rail standard for approved speed restrictions,

with all standard rail types.

The rail anchorage curb details have sufficient strength for use

Designed according to AASHTO LRFD Bridge Design Specifications.

03-16: Notes and Typ Curb Plans.

02-15: Payment note.

07-12: Width.

05-11: Gen Notes, T101 Anchor PL.

StandardDivisionBridge

of this standard to other for

mats or for in

correct results or da

mages resultin

g fro

m its use.

kin

d is

made by Tx

DO

T for any purpose

whatsoever. Tx

DO

T assu

mes no responsibilit

y for the conversio

n

The use of this standard is governed by the "T

exas E

ngin

eerin

g Practic

e

Act".

No

warranty of any

DIS

CL

AI

ME

R:

FILE:

DA

TE:

DN: CK: DW: CK:FILE:

JOB

COUNTY

SECT

DIST

REVISIONS

TxDOT TxDOT TxDOT TxDOT

HIGHWAY

SHEET NO.

C TxDOT

CONT

racsts02.dgn

February 2010

RETROFIT GUIDE

RAIL ANCHORAGE CURB

RAC-R

SHEET 2 OF 2

Bars S spacing are the same for Anchorage Type 1.

Showing Anchorage Curb Type 2. Anchor and

not shown for clarity.

Curb Slab and Slab reinforcing

Outside Wall

Culvert

Inside Wall

Culvert

Top Slab

Culvert

Bars H

laps with

K(#4 x 2'-4")

Wingwall

Culvert

D(#6)

Bars

Em

bed

Min

Wingwall

Flared

Existing

Skewed Culvert

of Existing

Outside Wall

Wingwall

Straight

Existing

Wingwall

Parallel

Existing

Const Jt

Permis

AT 0° SKEW CULVERT

PARALLEL WINGWALL

AT SKEWED CULVERT

PARALLEL WINGWALL

Culvert

Face of

Field side

Curb for Payment

End of Rail Anchorage

Curb for Payment

End of Rail Anchorage

Wing

Parallel

End of

Wing

Parallel

End of

New Anchorage Curb

Traffic side Face of

of Culvert

Field side Face

Anchorage Curb

of New Culvert

Traffic side Face

TYPICAL CURB PLANS

10"10"

4"

6" 6"

4"

Field side Anchors

Spa at 36" Max

Spa at 11" Max

Roadside Anchors

Wingwall Bars D

Bars S2 Spa at 9" Max

Bars S1 Spa at 9" Max

1'-2" 1'-2"

S2(#4)

J(#4)

S1(#4) H(#4)

TYPICAL ELEVATIONS OF INSTALLATION

New Wingwall Curb Slab

Bars K

Wingwall Rail Wingwall Rail

Anchorage Curb Anchorage Curb

Culvert Rail Anchorage Curb Culvert Rail Anchorage Curb

End of Rail Anchorage Curb for Payment

Note that Wingwall Rail Anchorage Curb is used only at culverts with parallel wingwalls.

Anchors

SHOWING CULVERT ANCHORAGE CURB SHOWING WINGWALL ANCHORAGE CURB

Breakback Line 7

2'-

0"

"C"

"T"

1

1

1'-

0"

Spa at 1'-0" Max

8

9

1'-

0"

Min

1

7

8

9

(NOT TO BE USED AS A STANDARD)

(CURBS 2'-0" TALL AND LESS ONLY)

BOX CULVERT RAIL MOUNTING DETAILS

Wingwall

Parallel

Existing

2"

2" 2"

Showing Geometry only. Reinforcing, Curb Anchors, and Railing not shown for clarity.

Wingwall

Flared

Existing

Skewed Culvert

of Existing

Outside Wall

Wingwall

Straight

Existing

Culvert

Face of

Field side

Anchorage Curb

of New Culvert

Traffic side Face

Culvert Rail Anchorage Curb

End of Rail Anchorage Curb for Payment

Same as Curb

Height "C"Height "C"

Same as Curb

03-16: Notes and Typ Curb Plans.

02-15: Payment note.

07-12: Width.

05-11: Gen Notes, T101 Anchor PL.

AT SKEWED CULVERT

STRAIGHT WINGWALL

OPTION A ~

AT SKEWED CULVERT

FLARED WINGWALL

OPTION A ~

AT SKEWED CULVERT

STRAIGHT WINGWALL

OPTION B ~

AT SKEWED CULVERT

FLARED WINGWALL

OPTION B ~

wingwall may need to be greater than "C" depending on side slope conditions.

of rail anchorage curb and wingwall. Extension of rail anchorage curb beyond

increased. Verify adequacy of existing or proposed finished grade between end

Use Option B if wingwalls will not be vertically raised when the curb height is

wingwalls must be checked for suitability of vertically raising.

or if both wingwalls and rail anchorage curb will be vertically raised. Existing

Use Option A if finished grade at face of rail anchorage curb remains unchanged,

Use hooked anchors for retrofit anchorage curb less than 1'-2" thick.

Use straight anchors if retrofit anchorage curb is 1'-2" or greater in thickness.

must be core drilled. Percussion drilling is not permitted.

wingwall thickness is less than 8", a special design will be required. Holes

Drill and grout Bars D(#6) 1'-0" Min into existing wingwall. If existing parallel

required even when existing reinforcing remains in use.

into new construction. Note that new Bars D(#6), as shown in the detail, are

as to not damage existing reinforcing. Clean and extend existing reinforcing

side face of the existing wingwall prior to breakback. Care must be taken so

Curb with that placed on the existing culvert. Saw cut (score) 1" deep on field

existing wingwall as needed in order to properly align the wingwall Anchorage

Retrofit Wingwall Anchorage Curb must always be 2'-0" in height. Breakback

Curb thickness.

a special design will be required. "C" is equal to the Retrofit Rail Anchorage

"T" is equal to the existing culvert top slab thickness. If "T" is less than 6",

10

11

10 10 11 11