Problem Solving Forum (4)


On a parking deck with harsh exposure conditions—from road salts, frequent wetting, and freeze-thaw cycles, to some exterior weathering—what generic type of film-forming coating works best and why?


What is the service life of a painted weathering steel bridge, compared to a painted carbon steel bridge in the same service environment?


A specification for a bridge to be built of high-performance weathering steel (HPS GR50/GR70W) requires an SSPC-SP 10, a profile of 3 to 5 mils, and metallizing with a final dft of 10-12 mils. What challenges, time, and costs are associated with obtaining the profile, primarily in the shop but also in the field? Are there any long-term performance issues with metallizing over weathering steel?


What is the service life of a painted weathering steel bridge, compared to a painted carbon steel bridge in the same service environment?


 
 
   

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