CHAPTER 10 - SUPPORTS FOR ROAD SIGNS - DRAWING DETAILS

Oct 29, 2026

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Road sign support drawing set detailing structural support arrangements for directional, information, and traffic signs under the Land Transport Authority framework. Includes multiple support sheets and an additional set for cantilever directional signs, road gantry truss, and cantilever extensions. Provides standardized dimension tables for signboard area limits, post sizes, footing sizes, base plate and fin plate sizes, bolt anchorage length, and related steel and concrete specifications. Includes design notes covering applicable conditions, materials standards, soil bearing capacity, fabrication, welding, galvanizing, and stiffening measures, with section and isometric detail callouts.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages17

Reading Time43 min

AccessFree to download

CHAPTER 10 SUPPORTS FOR ROAD SIGNS

Drawing and support sheet list

Typical steel brackets and support types

Detail tables and design notes

Section views and isometric detail callouts

# CHAPTER 10SUPPORTS FOR ROAD SIGNS DRAWING NO.REVISIONSUPPORT FOR DIRECTIONAL AND INFORMATION SIGNS(SHEET 1 OF 3)LTA/SDRE14/10/SUP1CSUPPORT FOR DIRECTIONAL AND INFORMATION SIGNS(SHEET 2 OF 3)LTA/SDRE14/10/SUP2CSUPPORT FOR DIRECTIONAL AND INFORMATION SIGNS(SHEET 3 OF 3)LTA/SDRE14/10/SUP3SUPPORT FOR TRAFFIC SIGN (SHEET 1 OF 4)LTA/SDRE14/10/SUP4BSUPPORT FOR TRAFFIC SIGN (SHEET 2 OF 4)LTA/SDRE14/10/SUP5BSUPPORT FOR TRAFFIC SIGN (SHEET 3 OF 4) DRAWING TITLE LTA/SDRE14/10/SUP6CSUPPORT FOR TRAFFIC SIGN (SHEET 4 OF 4)LTA/SDRE14/10/SUP7ROAD GANTRY TRUSS (SHEET 1 OF 2)LTA/SDRE14/10/SUP8AROAD GANTRY TRUSS (SHEET 2 OF 2)LTA/SDRE14/10/SUP9AROAD GANTRY SIGNLTA/SDRE14/10/SUP10SUPPORT FOR CANTILEVER DIRECTIONAL SIGNS(SHEET 1 OF 3)LTA/SDRE14/10/SUP11SUPPORT FOR CANTILEVER DIRECTIONAL SIGNS(SHEET 2 OF 3)LTA/SDRE14/10/SUP12 DRAWING NO.REVISIONSUPPORT FOR CANTILEVER DIRECTIONAL SIGNS(SHEET 3 OF 3)LTA/SDRE14/10/SUP13BTYPICAL STEEL BRACKETS FOR 4.5m HEIGHT LIMIT SIGN(900mmX900mm)LTA/SDRE14/10/SUP14SUPPORT FOR TRAFFIC SIGN (FOR ARTERIAL&EXPRESSWAY)LTA/SDRE14/10/SUP15 DRAWING TITLE A DETAIL FOR DIFFERENT TYPE OF SUPPORTS (FOR DETAILS,SEE LTA/SDRE14/10/SUP2&3) | SUPPORT
TYPE | MAXIMUM AREA OF SIGNBOARD | POST SIZE | FOOTING SIZE | | | BASE PLATE SIZE | DIAMETER OF
HD BOLT
(GRADE 8.8)
FOR BASE PLATE | BOLT
ANCHORAGE
LENGTH
(mm) | FIN PLATE
SIZE
(mm) | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | | AREA,(m²)=WXH | SHS
(mm) | L
(mm) | B
(mm) | D
(mm) | LXBX THK
(mm) | | | | | A | AREA≤1.54 | CHS 89×3.2THK | 600 | 600 | 1000 | 200×200×10 | - | | 150×50×8 | | B | 1.54AND INFORMATION SIGNS
(SHEET 10F 3) | | | | | | | | | | | | | | | | | | | | | | | | | DRAWING NO.
LTASDRE14/10/SUP1 | | | REV.
C | | C | JUL2020 | | | | | | | B | SEP 2017 | | | | | | | | | | DATE OF ISSUE
1st APR 2014 | SCALE
1:25 | SHEET NO.
1 OF 3 | | | A | OCT 2015 | | | | | | | REV. | DATE | | | | | | 1.The support design is applicable to only road signs mounted on ground and within(settlement,arch or void at the backfill area.the specified maximum area of signboard.Separate design with PE endorsement7.Fabrication and erection ot steel structure shall be in accordance withis required for other conditions(eg.arger area of signboards,mounted on bridges,)BS EN 1,SS EN 1993,BS EN 1090,SS EN 1994.located in sea,coastal or lake terrain)8.All structural steel sections shall be in accordance with BS EN 10025, 2.The minimum concrete grade shall be of C25/30.BS 7668,BS EN 10029 AND BS EN 10210-1. 3.The minimum concrete cover to all reinforcement shall be40mm. 9.All structural steel work shall be hot-dipped galvanised to 125 microns before one coat epoxy based primer and two coats of epoxy paint of 4(The minimum steel grade shall be S275.) 5.The minimum soil bearing capacity shall be 75 kPa. approved color (International Paint Intergard EAA001/EAA002 or equivalent)are applied. 10-1 SECTION B-B SCALE 1:25 SECTION C-C SCALE 1:25 | NOTES:(Continued)
10.All bolts strength

FAQs

What types of road sign supports are covered in this chapter?

It includes supports for directional and information signs, supports for traffic signs, and cantilever directional sign supports, along with road gantry truss and cantilever-related details.

How is the signboard size limited for different support types?

A table maps maximum signboard area (area = W×H) ranges to specific post sizes, footing sizes, and base/fin plate dimensions for support types A through E.

What standards and material requirements are specified for the structure?

Notes specify minimum concrete grade, minimum soil bearing capacity, steel grades, steel section standards, bolt strength grade, welding requirements, and hot-dip galvanizing plus epoxy primer and epoxy top coats.

Oct 29, 2026

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