Steel Flange Adapter Assembly for 1/4"–3/4" Flange electrogalvanized. The steel flange adapter and universal structural bracket are preassuembled, limiting work required in the field, installs on top or bottom flange of I-beams or bar joints, easily fits between metal deck and steel structure, the thumb spring retainer allows for ease of positioning, and the integrated angle gauge easily displays brace member angle of installation.