The 600 x 600 x 100mm Solid Ductile Iron Inspection Manhole Cover and Frame D400 is a heavy-duty, high-capacity access solution engineered for demanding vehicular areas such as major highways, industrial yards, commercial loading bays, and multi-storey car parks. Featuring a 600mm by 600mm clear opening and a robust 100mm frame depth, this solid top unit is designed to withstand extreme loads and high-frequency traffic without structural compromise.
 
Manufactured from premium-grade ductile iron, the cover and frame offer exceptional tensile strength-to-weight ratios and superior shock resistance compared to traditional grey cast iron. Classified as D400 under BS EN 124 standards, it is certified to bear a maximum test load of 40万 Newtons (40 tonnes), making it fully suitable for carriageways of roads, hard shoulders, and all types of heavy commercial vehicles. The solid top surface provides a durable, non-slip textured finish that maintains safe traction for vehicles and pedestrians alike in all weather conditions.
 
Designed for secure and efficient installation on site, the heavy-duty frame features a wide flange base for stable load distribution onto chamber walls or concrete bedding rings. Many variants also include captive hinges, locking mechanisms, or lifting key points to enhance site safety and prevent unauthorized access or theft. Whether you are constructing a new commercial access road, upgrading municipal drainage networks, or installing heavy utility inspection points, this professional-grade ductile iron manhole cover delivers maximum structural load capacity, long-term corrosion resistance, and total compliance with industry regulations.
 
DOUBLE TRIANGULAR COVER & FRAME
Application:
Estates (Residential, Commercial & Light Industrial). Not for carriageway use.
Loading:
D400
Lifting Key:
CD 552
Accreditations:
BS EN124:1994. BSI Kitemark Certified.
Product Features
Cover & Frame
Double-Triangular cover. Skeletal flange. Ductile iron.
Finish
Black bitumen coating.
External Dimensions:
728 (L) x 728 (W) x 100 (H)
Clear Opening:
600 (L) x 600 (W)