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