System One Contractor Rig Van Crossmember Kits

System One Van Contractor Rig Crossmembers are sold in sets 5 and attach to the mounting brackets which attach to the extension beams. The crossmembers can be mounted anywhere along the extension beam although prepunched mounting holes are provided in the extension beam for typical mounting locations. All System One Van Crossmembers have the same profile and contain 4 recessed t-slots - 2 in the upper surface and 2 in the lower surface of the crossmember. Stiffening ribs are available to mount to the underside of crossmembers and are most commonly used on 70" to 90" Van Crossmembers. Stiffening Ribs roughly double the capacity of the van rack (sold separately).