These composite duct access chamber covers are available to suit the 300mm and 450mm Duct Access Covers and should be used in Street Lighting or Traffic Signal duct access applications. Supplied with a locking galvanised frame, they are marked Traffic Signals/Street Lighting and enable the whole chamber to be B125 load rated (will support a slow moving vehicle weight of up to 38 tonnes)In domestic applications where standard driveway loading is all that is needed our competitively priced CLKS300 and CLKS456 Covers may also be used.