Road and Highway Construction Products Manhole Covers, Surface Boxes, Gully Gratings, Kerb Overflow Weirs, and Manhole Steps Introduction Technical Specification Cast Iron Double Triangular Manhole Covers & Frame Standard Double Triangular Manhole Covers Water Supplies Department Double Triangular Manhole Covers Standard Desilting Double Triangular Manhole Covers Cast Iron Double Seal Manhole Covers & Frames Double Seal Light Duty Manhole Covers Double Seal Medium & Heavy Duty Manhole Covers Double Seal 550 x 550mm Clear Opening x 75mm Frame Height Manhole Covers Double Seal Large Draw Pit Manhole Covers Cast Iron Double Seal Recessed Manhole Covers & Frames Double Seal Recessed Manhole Covers (Type 1) Double Seal Recessed Manhole Covers (Type 2) Cast Iron Surface Boxes Water Supplies Department Surface Box 300mm Square C.I. Surface Box Other Surface Box & Grating Covers Gully Grating Covers Type GA1-450 Cast Iron Double Triangular Gully Grating Covers Type GA2-325 Cast Iron Hinged Gully Grating Cover Kerb Overflow Weirs Type K1-450H Type K1-450V Manhole Step Iron BS1247 Galvanized Malleable Cast Iron Manhole Step Iron Stainless Steel Manhole Step Iron

(next)