Bar Grating Stair Tread Smooth Tread Width 36 In. Tread Depth 10.9375 In. Height 1 In. Nosing Checker Plate Material Black Painted Steel Bearing Bar Spacing 1.188 In. Bearing Bar Thickness 0.188 In. Number of Bearing Bars 9 End Plates 2.5 In. Load Capacity 400 lb.