Rainier Welding has been the “Go To” sign bridge and sign cantilever builder of the Northwest for many years, serving Yakima, WA and its surrounding areas. With hundreds of steel monotube sign structures supplied to State and Federal Highway Projects throughout the Northwest in our legacy, Rainier is now providing Pre-Engineered solutions for your Sign Support Projects in Yakima, WA. We can meet the National Transportation Safety Board (NTSB) requirements in all designated areas with designs based on wind, snow, and seismic calculations specific to your region. 


Fabricated from 50ksi steel, hot dipped galvanized per AASHTO M 111 and powder coated to your color specifications, these monotubes become an industry standard in Yakima, WA. Designed in a smooth parabolic camber curve, sign structures create a visually pleasing cost-effective solution to the freeway and highway design teams of Yakima, WA’s largest contractors. Each sign support, bridge, or cantilever, comes to you with structural engineering to the bottom of the base plate, leaving only the design of the footing to your local engineering team in Yakima, WA. 


  • Low Maintenance Costs
  • Non-Climbable Columns
  • Easy Installation
  • Faster Turnaround
  • Domestic Material (Made in USA)
  • AISC Major Bridge Certified Fabrication Company
  • Buy American Certified Product
  • Powder Coat per ASTM D3363/AAMA 2604 & ASTM D4541
  • Sign Bridge Lengths from 60′ to 180′
  • Cantilever Lengths from 15′ to 40′
  • Concrete Anchors Included
  • Concealed Electrical
  • Bird Nest Resistant
  • Economical
  • Unlimited Color Options
  • Fast Installation
  • No Site Welding Needed


Order Standard Stock Size or Custom Lengths as your project requires. We will provide submittal drawings, with calculations, for State by State approvals for your next project.

Please call Estimating 425.868.1300 ext. 101 or email [email protected]

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Calculations not available at this time for non-WA states.
Please call (425) 868-1300(Ext: 101).

Select Product



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Sign #1

Sign #2

Sign #3

Sign #4


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Sign #1

Sign #2

Sign #3

Sign #4

Are signs VMS?


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Platform #1

Platform #2

Only for testing purposes. Will be removed in the production build.

Total Overhead Width: ft.

Total Overhead Brackets No.: nos.

Total Overhead Brackets Weight: lbs.

Total Column Brackets Weight (x2 applied): lbs.

Total Weight: lbs.

Total Manhours: hrs.

Total Direct Labour Costs: $

Total Material Costs: $

Total Sub-contractor Costs: $

Total Material Profit: $

Total Labour Profit: $

Total Sub-contractor Profit: $

Grand Total Profit Before Markup $

*This estimate is a preliminary rough order of magnitude assuming standardized material designs based on current market prices.
Final pricing is provided via purchase order.
Pricing includes fabrication, coatings, and delivery to site.
Final pricing does not include engineering reactions calculations to bottom of baseplate or erection.