A1011 Carbon Steel Square Grating, Material Carbon Steel, Material Grade A1011, Overall Height 1 in, Overall Width 24 in, Overall Length 24 in, Cross Bar Spacing 4 in, Bearing Bar Spacing 1 3/16 in, Bearing Bar Thickness 1/8 in, Top Surface Serrated, Weight 21 lb, Application Driveway Drains, Floor Drains, Storm Water Drains, Trench Drains, Finish Black Painted Steel, For Use Indoors/Outdoors Yes, Rating @ Unsupported Length 632 lb/sq ft @ 2 ft, Shape Square Grating, Standards ISO 9001:2015