Use on Flatbed Trailers to cover loads of lumber, steel, wallboards, and various other loads. Hem is double folded with a reinforced pad at each grommet, brass grommets are spaced 24" O.C. 2" webbing with D-rings spaced 24" O.C. Stress is evenly distributed around cover and also protects the side of trailer from wear. Electronically Welded Seams- are seams heat welded together to form a bond that is stronger than a sewn seam. This forms a completely waterproof tarp. INDUSTRIAL TARP FABRICS -- Available in 10 oz., 14 oz., 18 oz., and 22 oz. Vinyl. Lightweight sides available in 10 oz Vinyl.