Shelving Bracket Rail 24 Inch For use with 8mm or 5/16 inch glass shelves. Available in two sizes: 32 and 24 inch (actual width: 31.5 and 23.5 inches). 24 Inch Rail actual measurements: 23.5 W by 2 H by 1.75 D inches. 36 Inch Rail actual measurements: 31.5 W by 2 H by 1.75 D inches. 77 pound weight capacity.