A1011 Carbon Steel Square Grating Material Carbon Steel Material Grade A1011 Overall Height 1 in Overall Width 36 in Overall Length 36 in Cross Bar Spacing 4 in Bearing Bar Spacing 1 3/16 in Bearing Bar Thickness 1/4 in Top Surface Smooth Weight 89 lb Application Driveway Drains Floor Drains Storm Water Drains Trench Drains Finish Galvanized Steel For Use Indoors/Outdoors Yes Shape Square Grating Standards ISO 9001 2015 System of Measurement Inch