
Race Rock / HIGHWAY SAFETY / SIGN SUPPORTS
LARGE ROADSIDE SIGN SUPPORTS
Custom-fabricated steel sign supports for highways, interchanges, and beyond.
WHAT IS IT?
Large Roadside Sign Supports by Race Rock
Race Rock fabricates large roadside sign supports for overhead and ground-mounted highway signage. Custom-fabricated to meet applicable DOT standards, our steel sign supports are built for the demands of highway infrastructure.
Our product offerings include:
- I-Beam Sign Posts (including breakaway configurations)
- Rail Mounts
- Bridge-Mounted Clearance Sign Assemblies (BMCS)
- Custom-Fabricated Sign Supports
Backed by AISC-certified fabrication, in-house engineering and detailing capabilities, and specialized finishing options, we deliver quality, precision, and dependable lead times for transportation infrastructure projects nationwide.

FABRICATION & CAPABILITIES
BUILT TO HANDLE YOUR SCALE
From large I-beam sign posts to custom rail mounts and bridge-mounted clearance sign assemblies, Race Rock delivers precision-fabricated steel sign supports built to project specifications.
AISC
Certified fabrication with 100% U.S. domestic certifications
DOT
Built to applicable TxDOT and Northeast DOT specifications
IN-HOUSE
Engineering, detailing, and shop drawing capabilities
CUSTOM
Galvanized, painted & powder-coated finishing options
WHAT WE OFFER
LARGE ROADSIDE SIGN SUPPORT SOLUTIONS
From ground-mounted I-beam sign posts to bridge-mounted assemblies, Race Rock fabricates steel sign supports to meet the demands of highway and transportation infrastructure projects.
GROUND-MOUNTED
I-BEAM & BREAKAWAY SIGN POSTS
Race Rock fabricates large I-beam sign posts with welded bases, gussets, and hinge plates for highway guide and exit signage. Breakaway configurations are available where required, with compatibility for Transpo slip-base brackets.
CUSTOM FABRICATED
RAIL MOUNTS
Custom-fabricated steel rail mounts built to project specifications, providing mounting solutions for roadway and transportation signage. Available with galvanized, painted, or powder-coated finishing options.
BRIDGE-MOUNTED
BRIDGE-MOUNTED CLEARANCE SIGN ASSEMBLIES
Race Rock fabricates bridge-mounted clearance sign assemblies (BMCS) to meet applicable DOT standards and project requirements, supporting critical clearance signage across highway and bridge infrastructure.
OUR WORK
PRODUCT SHOWCASE
A closer look at Race Rock’s large roadside sign supports and custom-fabricated steel assemblies, built for highway and transportation infrastructure projects.








Why Race Rock
What Sets Us Apart
Standards We Meet
Certifications & Standards
Fabricated to applicable DOT specifications and project requirements.
- TxDOT Sign Mounting Details
- Large Roadside Sign Mounting Details
- Triangular Slipbase System Details
- CTDOT, NYSDOT & VTDOT specifications
Supporting transportation infrastructure projects nationwide.
Product Resources
CTDOT Large Sign Supports
NYDOT Large Sign Supports
VTDOT Large Sign Supports
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