For everywhere subject to heavy traffic where substances hazardous to water such as fuels, mild lye and acids accrue. 5 nominal widths, construction lengths: 0.5, 1.0, 2.0 metres, officially certified.
For drainage of areas subjected to high levels of dynamic horizontal forces. Resistant against mildly aggressive agents. 3 nominal widths, made of reinforced C 40/50 concrete, construction lengths: 1.0, 1.5, 4.0 metres, with official certification.
For drainage of surfaces in areas undergoing heavy-duty transport; also for areas where the architectural and flexibility demands are especially high. 7 nominal widths, lengths up to 2 metres and our large selection of gratings.
For drainage of areas subjected to high levels of dynamic horizontal forces and high traffic heavy-duty transport areas. NW 150 and 200, made of C 40/50 constructively reinforced concrete, construction lengths 1.0 and 2.0 metres, with and without hot-dipped galvanised zinc surface protection.
BIRCO cast covers guarantee flexibility in their utilisation and in construction possibilities, above all through enormous load reserves. Black-immersion lacquered spherical cast or galvanised cast, construction length 0.5 m.
The galvanising process sees the metal coated with a zinc layer to protect it from corrosion. BIRCO covers are hot galvanised so that all of the edges and openings are evenly coated and the protection from weathering. Construction length: 0.5 and 1.0 m.