Manhole & Gully Top Load Classifications

Class Load Capacity Application Areas
A15 15 kN Pedestrian areas, light foot traffic.
B125 125 kN Footways, pedestrian zones, car parks.
C250 250 kN Kerbside channels of roads, car parks, and medium-duty vehicular areas.
D400 400 kN Carriageways, hard shoulders, parking areas, and general road traffic.
E600 600 kN High wheel-load areas: docks, aircraft pavements, and industrial zones.
F900 900 kN Very high wheel-load areas: heavy-duty aircraft pavements and extreme-load zones.

Carriageway/Telecom Covers

A one-of-a-kind design that serves a dual purpose: facilitating cable passage for telecom networks while preventing accidental or unauthorized access to the cable pit. The innovative leaf cover concept simplifies maintenance tasks.

Model CDT 802 CW1
Standard BS EN 124 compliant BS EN 124 compliant
Key Features Anti-skid checker design Multi-piece design for easy handling Lug-fit system for stability in heavy traffic
Security Options Bolt-down provision Optional interlocked covers Bolt-down provision Interlocked covers Safety grid option
Material Ductile iron (standard) Ductile iron (standard)

Square and Rectangular Frames and Covers

Drain covers are designed to block the escape of foul odours while securing access points. They consist of two key components: a sturdy frame and a fitted cover, which together form a protective lid over manhole openings. This design prevents accidental or unauthorized entry into the drainage system.

Parameter CQR-800 CDD-170 CDG-775 CDS-101 CDD-102 CDS-164 CDD-1
Standard BS EN 124
Clear Opening 800×800mm 900×600mm 750x750mm 600x600mm 600x600mm 600x450mm 450x4
Overall Size 985×985mm 1075×775mm 925x925mm 735x735mm 775x775mm 755x605mm 625x6
Depth 100mm 100mm 100mm 100mm 100mm 100mm 100mm
Design Type Single Double Single Single Double Single Double
Load Class D400 D400 D400 D400 D400 D400 D400
Key Feature Anti-skid Anti-skid Anti-skid Anti-skid Anti-skid Anti-skid Anti-sk
Security Bolt-down Bolt-down Bolt-down Bolt-down Bolt-down Bolt-down Bolt-do
Material Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile Iron Ductile

Circular frames and covers

Circular covers serve the same purpose of covering manhole drains. A key advantage is that they cannot fall through their circular openings and require no rotation to align when placed over a manhole.

Parameter CDC 700 CDC 701 CRC 902
Model CDC 700 CDC 701 CRC 902
Standard BS EN 124 BS EN 124 BS EN 124
Clear Opening ф600 ф600 ф600
Over Base mm 750x750 750x750 Ф1060
Depth 100 100 50
Load Class D400 D400 B125
Design Anti-skid checker Anti-skid checker Anti-skid checker
Options Hinged/Bolted/Vented Covers Hinged/Bolted Hinged/Bolted//Vented Covers

Recessed Frames and covers

Infill covers, also known as recessed covers, are an ideal solution for concealing manholes. They allow concrete or other floor finishing materials to be inserted, ensuring a seamless and aesthetically pleasing integration with the surrounding surface.

Parameter Specification
Product Code CDR 1001
Standard BS EN 124 (Class B125)
Load Capacity Achieved before concrete filling*
Clear Opening 600 × 600 mm
Over Base Size 725 × 725 mm
Total Depth 95 mm
Recessed Depth 70 mm
Seal Type Double seal
Flange on Frame No
Design Feature Non-rock (rattle-proof)

Gas and Air Tight Inspection Covers

Gas- and air-tight inspection covers are specially designed and precisely machined to prevent the emission of foul odours and ensure a watertight seal.

Parameter Specification
Model CGT 007
Standard BS EN 124
Load Capacity Achieved before concrete filling
Seal Type Gas/air-tight
Design Feature Non-rock (rattle-proof) design
Clear Opening 750 × 1300 mm
Over Base Size 1060 × 15590 mm
Total Height 102 mm
Seating Height 90 mm
Load Class F900 (900 kN)

Catch Basin Covers

Catch basins are specially designed to trap bulky materials that cannot easily pass through the sewer system. They feature a grate to capture floating debris and facilitate the settling of solids.

Parameter Specification
Model ADS 601
Standard BS EN 124 (Class C250)
Design Feature Anti-skid checker pattern
Product Code ADS 601
Clear Opening 660 × 610 mm
Cover Size 705 × 655 mm
Over Base Size 870 × 800 mm
Total Depth 40 mm
Load Class C250 (250 kN)