We got you covered™ with the 814® series 18″ X 30″ frames & grates. Use for storm inlet, curb, area & linear grate arrangements. All combination frames, standard grates, vane grates, pedestrian style ADA rated grates, curb hoods, I-beams, nuts & bolts, stock items. TXDOT approved specifications. Check individual items for traffic rating & ASTM data. Open areas listed in grate descriptions (flow data must be calculated by qualified engineer) Beware of poor quality imports, always insist on products made in the USA. Please use the Contact Form or call us to request info & submittal sheets. 1-800-258-2278 Toll Free (972) 263-1360 DFW Local.