The Hinged Road and Yard Gully Grid and Frame D400 (450 x 450 x 100mm) is a heavy-duty, high-capacity drainage solution engineered for demanding external environments such as commercial yards, car parks, industrial access roads, and highway channels. Featuring a 450mm by 450mm clear opening and a robust 100mm frame depth, this grating unit is designed to efficiently capture surface water run-off while withstanding intense vehicular pressure.
 
Manufactured from high-grade ductile iron, the gully grid and frame offer an exceptional strength-to-weight ratio and superior impact resistance compared to traditional grey cast iron. Classified as D400 under BS EN 124 standards, it is fully certified to bear a maximum test load of 400kN (40 tonnes), making it completely safe for carriageways of roads, hard shoulders, and all types of heavy commercial transport.
 
Engineered for practical site operation, the unit features an integrated captive hinge mechanism that allows the grating to open securely without becoming detached, preventing loss and streamlining routine gully cleaning and debris clearance. The slotted grating design maximizes water intake while preventing large debris or litter from entering and blocking the sub-surface drainage network.
 
Designed for secure installation by contractors and civil engineers, the heavy-duty frame includes a wide flange base for stable load distribution onto gully pots or concrete seating. Whether you are draining a busy commercial yard, a logistics depot, or a municipal roadway, this professional-grade ductile iron gully grid delivers maximum hydraulic performance, structural durability, and complete compliance with industry regulations.
 
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