US Patent 7866112 Slotted metal truss and joist with supplemental flanges

A slotted channel with a supplemental flange as a building member has at least one supplemental flange extending from at least one slot in the member web or primary flanges yielding a building member with increased strength, both compressive (longitudinally) and in shear (transverse). The slotted member presents a reduced area through which heat or sound may be conducted and slots in which insulation is received, both increasing resistance to heat and sound transfer.