Strong Racks 4'x8' 1000 Pound Overhead Wall Shelf - Silver Weight Capacity: 1000 LBS, Color Silver Size: 4 x 8 Commercial Grade Overhead Wall Shelf. Thickness 10ga. Mounting Track (Thickest). 16ga. down tubes Rack Clearance: 29.5" Min. to 41.5" Max. Mounts into 4 joists and two wall studs, Tubular Downrod construction, safety rail,grids bolted Storage: 27.5" to 39.5" Clearance 28.5" to 41" (bottom of rack)