attachment-3-bid-94-26.pdf
PDF 428 KB Posted
- Attached to
- Bridge Rail Parts
- Solicitation number
- Bid 94-26
- Issued by
- Hillsborough County, New Hampshire
About this file
This is a technical specification and design drawing document issued by the New Hampshire Department of Transportation, Bureau of Bridge Design, for bridge rail components used on interstate, state, and local roads. The document provides detailed engineering specifications and installation requirements for the T3 Steel Bridge Approach Rail system, including W6x25 and W6x8.5 steel posts, W-beam guardrail components, thrie-beam transition sections, connection plates, end caps, and synthetic offset blocks. The specifications include comprehensive dimensional details, material grades, bolt specifications, welding requirements, and assembly instructions presented through multiple scaled technical drawings and cross-sectional views. The system is designed to meet MASH TL-4 crashworthiness standards, with documentation indicating crash testing completed by NETC in 2005 and computer simulation validation. The approach rail assembly accommodates transitions between different rail types and includes specific provisions for curb integration, post spacing at 6 feet 3 inches typical intervals, and synthetic offset blocks for grade transitions.
The document specifies material requirements including Grade 36 galvanized steel for connection plates, ASTM A307 carriage bolts and splice bolts, ASTM A563 nuts with double recessed designs, and 10 and 12 gauge thrie-beam components. All materials and components must conform to NHDOT specifications and bridge rail standards unless otherwise noted. The design has undergone in-service performance evaluation over 29 years and incorporates modifications approved by NHDOT administrators and FHWA. The specification indicates this is a standardized design suitable for implementation across multiple road classifications, with the engineer of record responsible for any modifications made to the approved details. Pay limits are established for the approach rail unit, with specific notation that splice bars are included within the approach rail compensation structure.
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Other files
| File | Type | Posted |
|---|---|---|
| attachment-4-bid-94-26.pdf | ||
| attachment-5-bid-94-26.xlsx | XLSX spreadsheet | |
| addendum-1-bid-94-26.pdf | ||
| bid-94-26.pdf | ||
| addendum-2-bid-94-26.pdf | ||
| attachment-2-bid-94-26.pdf | ||
| attachment-1-bid-94-26.pdf |
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Text version
T Y
P
2"
SCALE: 1
SIDE VIEW
RAIL POST (W6x25)
FRONT VIEW
� RAIL POST
INSTALL TWO BOLTS
(4 SLOTS IN POST
FLANGE OPTIONAL)
� 1 8"x 1
8"
SLOTTED HOLES
V A
R
IE
S
V
A R
IE
S
"8
6 "8
(TYP)
"4
2"
TAPER ALL
W6X25 TOPS
AS SHOWN
* 1"x 1"x 8"
TAB (TYP)
16"
SCALE: 1
END CAP DETAILS
ROUND CORNERS
16" PLATE
** 7
8" HSS8
2" HSS4
* WELD TABS TO END CAP PLATE
IN TAPERED POSITION SO CAP
CAN BE JAMMED INTO END OF
RAIL TUBE
** SEE RAIL NOTES ON BRIDGE
RAIL SHEET
H
S S
H
S S
4"
** 3
8" HSS8
** 3
2" HSS4
1" Ø HOLES
(TYP)
4" Ø HOLES
(TYP)
SCALE: 1
CONNECTION PLATE
CLIP
1"x 1"
8" STEEL (GR 36)
CONNECTION PLATE
(GALVANIZED)
4"4"
"4
3"4
1'-08"3"
2'-3"
3"
SCALE: 1
SECTION B-B
(CONNECTION PLATE)
TOP RAIL
8" CONNECTION
PLATE
16"
16"
8"
8"
16"
16"
16"
8"
8"
4"
10 GAGE PLATE OF
THRIE-BEAM TERMINAL
CONNECTOR
OUTLINE OF
TERMINAL
CONNECTOR BOTTOM RAIL
4" Ø A307
CARRIAGE BOLT
(TYP)
TOP RAIL
OVERLAPPING OF DOUBLE NESTED
THRIE-BEAM NOT SHOWN FOR CLARITY
SCALE: 1
DETAIL A
B
B
OUTLINE OF
TERMINAL CONNECTOR
� W6x25
BOTTOM
RAIL
CONNECTION PLATE
RAIL SLOPE SET
AT BOLT LINE
4" Ø HOLES AT FRONT
FACE OF W6x8.5 POST (TYP)
END OF
CONNECTION
PLATE
� W6x8.5 (POST)
& SYNTHETIC
OFFSET BLOCK
4" Ø A307
CARRIAGE BOLTS
4"4"
"4
4 "4
1'-1
"8
2"8
1'-18"3"
"8
2'-5
SEE RAIL
POST DETAIL
SEE BRIDGE RAIL SHEET FOR
RAIL ATTACHMENT METHOD (TYP)
LAP SECTIONS
IN DIRECTION OF TRAFFIC
W-BEAM GUARDRAIL (12 GAGE) (ROADWAY ITEM)
(6'-3" POST SPACING TYPICAL)
8'-5 4"
SLOPE
DETAIL A
8'-8" POST
LENGTH (TYP)
SCALE:
4" = 1'-0"
ELEVATION - APPROACH RAIL
16"
MIDDLE RAIL 4
16"
BOTTOM RAIL 1
4"
ALL RAILS
(ONE PIECE)
2'-11"
A
A
2'-10"
2'-10"
FACE OF RAIL CONNECTION PLATE
(GALVANIZED)
CURB LINE
PLAN VIEW - APPROACH RAIL
W-BEAM GUARDRAIL (12 GAGE) (ROADWAY ITEM)
FLARE BACK W-BEAM GUARDRAIL AT 80:1 FOR
25'-0" TO RESTORE RAIL-TO-RAIL WIDTH
UNLESS DIRECTED OTHERWISE
SCALE:
4" = 1'-0"
7" REVEAL
7" REVEAL
1" (TYP)
FLARED @ 10:1
4" REVEAL
END CAPS (GALVANIZED)
(TYP)
W6 x 8.5 POST (TYP)
LEVEL
1" (TYP)
SYNTHETIC OFFSET BLOCK (TYP)
8" DEEP (NOMINAL) x 1'-10" LONG
SYNTHETIC OFFSET BLOCK FOR TRANSITION SECTION
8" DEEP (NOMINAL) x 1'-6" LONG
PAY LIMITS ITEM 565.232, BRIDGE APPROACH RAIL T3 (STEEL POSTS), (APPROXIMATE LENGTH = 29'-2")BRIDGE RAIL T3
2'-7"
SPLICE BARS (TYP)
(PAID UNDER APPROACH RAIL UNIT)
(SEE NOTE #6)
SYNTHETIC OFFSET BLOCK
FOR W-BEAM GUARDRAIL
(TYP)
(DO NOT BEND)
MORTAR JOINT
(SEAL WITH
ITEM 562.1)
1'-8" OR L
1'-6" ± 3"X'-X"
(W-BEAM TO THRIE BEAM) (10 GAGE)
6'-3" TRANSITION SECTION
DOUBLE NESTED 12 GAGE THRIE BEAM (12'-6")
"8
2'-5
3 SPACES @ 2'-2" = 6'-6"
(3'-0" - 5'-6" MAX)
X'-X"
PLATE
CONNECTION
TERMINAL CONNECTOR
THRIE BEAM
"2
3'-1"2
" = 9'-44
6 SPACES @ 1'-6
6'-3""2
3'-1"2
3'-1
SECTION
FLARED
(DO NOT BEND)
32'-6" OF STRAIGHT GRANITE CURB (ITEM 609.01)
SCALE:
4" = 1'-0"
SECTION A-A (POST RAIL ASSEMBLY)
VARIES
X
8" Ø A307 B.H.
SPLICE BOLT (TYP)
1"
FINSIHED GRADE SHALL BE
LEVEL WITH TOP OF CURB
SYNTHETIC
OFFSET BLOCK
W6 x 8.5
APPROACH
CURB*
8" Ø
2" A307
BUTTON HEAD BOLT (TYP)
SEE GENERAL
PLANS*
WEARING
COURSE*
HBP*
CRUSHED GRAVEL*
PAY LIMITS
COMMON EXCAV.*
DOUBLE RECESSED NUT
W/ ROCK WASHER (TYP)
2'-6"
"4
* SEE BRIDGE APPROACH CURB DETAIL SHOWN
ELSEWHERE IN THE CONTRACT PLANS.
NOTES:
PENETRATION BUTT WELD (B-U2).
6. WELD BARS ADJUSTED FOR SLOPE & BEND. USE COMPLETE JOINT
606 OF NHDOT SPECIFICATIONS.
7. ALL COMPONENTS, EXCEPT TUBULAR RAIL, SHALL CONFORM TO SECTION
NOTED. SEE BRIDGE RAIL SHEET FOR NOTES AND ADDITIONAL INFORMATION.
SHALL BE THE SAME AS THOSE OF THE BRIDGE RAIL, UNLESS OTHERWISE
3. ALL BRIDGE APPROACH RAIL MATERIALS, DIMENSIONS,SIZES, AND NOTES
GRADE A OR BETTER (GALVANIZED).
5. CARRIAGE BOLTS SHALL BE ASTM A307, AND NUTS SHALL BE ASTM A563
W6 x 8.5 POSTS SHALL BE THE SAME AS W-BEAM GUARDRAIL POSTS.
4. W6 x 25 POSTS SHALL BE THE SAME MATERIAL AS THE BRIDGE RAIL POSTS.
1. FOR USE ON ALL INTERSTATE, STATE, AND LOCAL ROADS.
NCHRP 350 TL-4 (FHWA LETTER: HSSD/B-146, JULY 2008).
JUNE 2022. CRASH TESTED (NETC 2005) AND ACCEPTED AS RAILING",
"IN-SERVICE PERFORMANCE EVALUATION OF NETC BRIDGE (29 YEARS):
(NETC), APRIL 2020. FIELD PERFORMANCE CRASHWORTHINESS DETAILS"
MASH COMPUTER SIMULATED STEEL BRIDGE RAIL AND TRANSITION
"DEVELOPEMENT OF 2. MEETS MASH TL-4 BY LS-DNYA SIMULATION:
IN THE TITLE BOX OF THE SHEET.
THE MODIFICATIONS HAVE ON OTHER COMPONENTS WITHIN THE SHEET AND NOTED AS THE DESIGNER
FOR THE MODIFICATIONS BECOMES THE ENGINEER OF RECORD (EOR) FOR THOSE DETAILS AND ALL EFFECTS
IF ANY MODIFICATIONS ARE MADE TO THE DETAILS OTHER THAN NOTED BELOW, THE ENGINEER RESPONSIBLE
THIS SHEET IS BACKED BY CRASH TESTING AND APPROVED BY THE NHDOT ADMINISTRATORS AND FHWA.
1. DISTANCE FROM LAST BRIDGE POST TO 1ST APPROACH POST.
10 GAGE
4"x
2"
SLOTTED HOLES
1"x 2" DIAGONAL
SLOTTED HOLES
SCALE: 1" = 1'-0"
THRIE-BEAM TERMINAL CONNECTOR
C
C
SCALE: 1" = 1'-0"
VIEW C-C
9 - 1" Ø HOLES FOR
4" Ø A307 CARRIAGE
BOLTS (TYP)
"8
7 ( T
Y P
T
Y P
3""4
4"4
44"
"4
1'-08"2"
2'-6"
3"
SCALE: 1" = 1'-0"
x
F O
R
Ø
B U
T T
O N
H E
A D
B O
L T
S x
S
L O
T S
S
L O
T S x
S
L O
T S
THRIE-BEAM TO W-BEAM TRANSITION SECTION
" (10 GAGE)2
7'-3
"4
4"4
4 2"
2" MIN
2" MIN2" "4
4"4
6'-3"
"2
3'-1"2
3'-1
"4
"4
STATE OF NEW HAMPSHIRE
DEPARTMENT OF TRANSPORTATION * BUREAU OF BRIDGE DESIGN
BRIDGE NO. STATE PROJECTTOWN
LOCATION
REVISIONS AFTER PROPOSAL
SHEET SCALE
DESIGNED
DRAWN
QUANTITIES
REV. DATE
ISSUE DATE FEDERAL PROJECT NO. SHEET NO. TOTAL SHEETS
FILE NUMBER
OF
BRIDGE SHEET
DATEBY
CHECKED
CHECKED
CHECKED
DATEBY
SUBDIRECTORY
BR-RAIL-ST T3 BR-APP-RAIL
.DGN LOCATOR
T3 STEEL BR APP RAIL (STEEL POSTS)
XX
NHDOT
JSZ 10/05
XX/XXXXXXX/XXXXX
PJP 10/05
3/02NETC/JSZ
AS NOTED 12/2024
11/15/05
N26ADH
Text Box This sheet is the T3 Approach Unit.
File details come from the government source that posted it. Updated .