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You are here :: HOME > Products > Signpost Products :: U-channel
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- Rib-Bak® U-channel Sign Posts
- U.S. New-Billet Steel
- 80 - 100 KSI
- NCHRP 350 Approved
- Multiple Sizes Available
- Powder Coated or Galvanized (Bare available)

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Rib-Bak® :: The heart of Nucor
Steel Marion highway products.
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Made
of our tough new billet steel, RIB-BAK® is the strongest U-channel
post available, especially in the crucial load bearing points, with
over 25% greater tensile strength than our competitor’s rail
steel. Its RIB-BAK® design withstands higher wind loads and
saves money by supporting a lot more sign per post. Its contact points
are flush surfaces, providing solid, more permanent sign attachment.
And installation typically takes just minutes, with posts easily driven
with conventional tools.
- Check out our U-channel Stock List (PDF)
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- Comparing Signposts

| Multiple Sizes |
Powder Coating at the Price of Paint .
Only Nucor Steel
Marion gives you the superior rust-resistant protection, durability and
appearance of powder coating—at the price of paint. Called
Powder-Shell™, it’s available for all sizes of RIB-BAK®
in green, black, yellow, white, orange and brown (other colors by
request). For the ultimate protection against the elements,
RIB-BAK® posts are also available in hot-dipped galvanized (ASTM
A-123).
Crash Tested and Approved.
RIB-BAK® U-channel signposts and breakaway systems are accepted by
the FHWA (Federal Highway Administration) for small sign support
applications, and also meet the NCHRP 350 criteria for occupant impact
velocity.
(NOTE: 3 lbs.
/ft x 3 supports – and all 4 lbs./ft supports – must use
breakaway hardware to comply with FHWA breakaway requirements.)
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Powder Shell

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Signpost Products
Technical Aides
Post Drawings
ASTM
Nucor Steel Marion products meet or exceed the following ASTM specifications:
STEEL MSDS
• ASTM A-499 Yield Strength
• ASTM A-1 Chemical Analysis
GALVANIZING MSDS
• ASTM A-123-89a Zinc Coating on Steel
POWDER COATING MSDS
• ASTM D523 Gloss
• ASTM D3363 H-2H Pencil Hardness
• ASTM D522 Flexibility
• ASTM D3359 5B Adhesion
• ASTM D2794 Direct and Reverse Impact
Details on all ASTM specs available upon request. |
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