WisDOT uses the top-mount design that MwRSF crash tested for us. We at WisDOT, are having discussion about what is the appropriate grade steel for the top plate in the top mount MGS. I’ve taken our standard an put a cloud around the plate we are talking about.
Our structure staff indicate that the steel should be ASTM A709 Grade 50 or 50S.
I indicate that the steel could be: ASTM A36, ASTM A992 50KSI min, ASTM 529 Grade 50, or ASTM 572 Grade 50.
I pulled down two Q/A’s from the MwRSF Question site (see attached). To me it indicates that we can use the steel grades I listed, but I’m not a bridge engineer.
After reviewing the Ohio Q and A the structure staff has the following concerns:
If you could assist I would be appreciative.
Thanks
A few thoughts on the steel specification for the culvert mounted post base plate comments you are running into.
Thanks!
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