This hinged gully grating and frame is made from ductile iron. It is compliant with the design requirements of UK Highways Agency DMRB HA104/09 for gully tops.It has a 40 Tonne Load Rating making it ideal for use on carriageway and highway kerbside areas and commercial / industrial locations.This grating has a straight bar design with a taper lock grating design to ensure non-rocking. There is a 3-sided flange for flush installation against a kerb, and a captive hinge to guard against theft.This grating has an integral lever point to aid opening.The internal dimensions (clear opening size) of this product are 430mm x 370mm for use with a 450mm diameter gully such as our GULLY450 and our GULLY450X900.The overall dimensions of this product are 570mm x 459mm x 100mm. The grating comes with a black bitumen coating.Manufactured by Clark-Drain.