The DSW Duct Support Series is designed specifically for HVAC ductwork. The fixed dimensions give the ability for quick install times. The double widebody C-Ports (CW24) provide added support with a larger footprint and are made of 100% recycled rubber. The DSW Series also come equipped with 4-hole 90-degree fittings for added crossbeam support and 8 hold wings fittings to connect the uprights to the C-port bases.Crossbeam width 40". Crossbeam height up to 36". Base length 24"