The Hinged Grating and Frame Iron D400 (430 x 370 x 100mm, CLKS 180 / KMD / KD500) is a heavy-duty, high-performance drainage solution specifically engineered for carriageways, major estate roads, hard shoulders, and heavily trafficked commercial yards. Featuring a 430mm by 370mm clear opening designed to sit efficiently over standard gully pots and a robust 100mm frame depth, this unit provides exceptional surface water capture while handling rigorous vehicular demands.
 
Manufactured from premium-grade ductile iron, this assembly offers an optimal strength-to-weight ratio and superior impact resistance. Classified as D400 under BS EN 124 standards, it is fully certified to bear a safe test load of 400kN (40 tonnes), making it entirely suitable for fast-moving traffic, industrial transport, and heavy commercial vehicles. The slotted grating design maximizes water intake efficiency while preventing larger debris from entering and blocking the sub-surface drainage network.
 
Engineered for operational efficiency and site safety, the unit incorporates a captive hinged mechanism that secures the grating to the frame during maintenance to prevent loss or theft while allowing smooth opening. Enhanced by a non-rock three-point suspension system to eliminate rattling and protected by a durable black anticorrosive coating, this professional-grade gully grating delivers long-term structural reliability and total compliance for civil engineering projects.
 
Manufactured to BS EN124 Class D400
40 Tonne Safe Test Load
Kitemarked for third party assurance of quality
Works safety tested to +10% above EN 124 = 44Tonnes
Anti movement technology for improved bonding to bedding material
Non rock three point suspension for stability & silent operation
Ductile iron for improved weight to strength ratio
Black coated finish