AISC-2220H-472M-T AISC-2220H-4R7M-T AISC-2220H-680K-T AISC-2220H-681K-T AISC-2220H-6R8M-T AISC-2220H-R12M-T AISC-2220H-R27M-T AISC-2220H-R47M-T AISC-Q0402-10NG-T AISC-Q0402-10NJ-T