Fabric Tension Buildings & Tensioned Membrane Structures | Rubb USA Tensioned membrane structures, Fabric buildings, Fabric building manufacturers, Relocatable buildings, Fabric shelters, fabric structures, tension fabric building, salt storage buildings, salt shed, aircraft hangar, sun shades, military buildings, relief shelters, port storage buildings Rubb Building Systems is a leader in clearspan relocatable and permanent fabric tension structures, buildngs and shelters. Explore now.