Exist. Bldg with ASTM A53 Gr A Columns
Exist. Bldg with ASTM A53 Gr A Columns
(OP)
I have an existing building built in 1979 with 4x4x3/16 columns which the general notes state ASTM A53-52T Grade A. The loads added to the existing building are greater then the 5% increase allowed therefore I need to bring the existing lateral system up to code. I wanted to try and use these columns but not sure if I should since Gr A is not listed in the 13th edition.






RE: Exist. Bldg with ASTM A53 Gr A Columns
RE: Exist. Bldg with ASTM A53 Gr A Columns
RE: Exist. Bldg with ASTM A53 Gr A Columns
Fy = 30 ksi min.
Fu = 48 ksi min.
I guess what I was wondering is if they could be used since I need to bring the building up to code and that designation is not in the current AISC manual. If it's not in the manual is it unusable per current code?
RE: Exist. Bldg with ASTM A53 Gr A Columns
Michael.
Timing has a lot to do with the outcome of a rain dance.
RE: Exist. Bldg with ASTM A53 Gr A Columns
The good news is that it's likely that the square sections have higher yield properties than A53.
RE: Exist. Bldg with ASTM A53 Gr A Columns