Strong Racks 4'x8' 750 LB Overhead Storage Unit (white) Weight Capacity: 750 LBS, Color white Size: 4 x 8 Commercial Grade Overhead Rack. Thickness 10ga. Mounting Track (Thickest). 16ga. down tubes Rack Clearance: 29.5" Min. to 41.5" Max. Mounts into 4 joists, Tubular Downrod construction, safety rail,grids bolted into place Storage: 27.5" to 39.5" Clearance 28.5" to 41" (bottom of rack)