Bar Grating, Aluminum, 6063, Square, 4 ft Overall Length, 4 ft Overall Width, 0.188 in Bearing Bar Thickness, Top Surface Smooth, Bearing Bar Spacing 1.188 in, Cross Bar Spacing 4 in, Weight 3.01 lb/sq ft, Standards ISO 9001:2015 Certified, Minimum Temperature Not Applicable, Maximum Temperature Not Applicable, Application Marine, Mezzanine Floors, Sewage and Waste Treatment Plants, Walkways, Deflection @ Unsupported Length See Load Table, For Use Indoors/Outdoors Yes