Item #SuperstrutB-LineUnistrutGBC460U514-AB212-38P1985 SGBC470U514B212-1/4P1272 SGBC480U515B427P1271 SGBC490–B211P1379 SGBC491U510––GBC500A597B314P1796 SGBC700–B435–GBC890U501B441-22P2785GBC891U502B441-22AP2786GBC900U512B355P1386