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Every M&C composite cover is manufactured to and independently tested against international standards. Below is a plain-language explanation of what each test involves — and what it means for your project.
The cover is placed on its frame and a vertical load is applied at the centre point using a calibrated press. For D400, the test load is 400 kN (approximately 40 tonnes). The cover must not fracture, crack, or deflect beyond the permitted limit. This is the primary structural test.
A repeated cyclic load is applied to simulate real-world traffic patterns over time. The cover must withstand 10,000 load cycles at the rated load without structural degradation. This confirms long-term durability, not just a one-time pass.
A weighted striker is dropped onto the cover surface from a defined height to simulate sudden impact loads — for example, a vehicle kerbing a cover at speed, or a dropped heavy object. The cover must absorb the impact without fracture or dangerous fragmentation.
Physical dimensions, clear opening, frame seating depth, and minimum mass are verified against EN124 requirements. This ensures covers are interchangeable and fit standard frames. For composite covers, minimum mass requirements differ from cast iron — the standard accounts for material differences.
The primary international standard. Defines six load classes (A15–F900). Our D400 covers are tested to withstand 400 kN applied load. Accepted in Europe, Middle East, Asia, and Africa.
Mandatory for Australia and New Zealand projects. Equivalent load classes to EN124. Our covers are certified for the Australian market and suitable for AS3996 project specifications.
The relevant standard for North American highway projects. Our covers meet AASHTO H-20 loading requirements, accepted by US and Canadian road authorities.
D400 — 40t, main carriageways, fuel forecourts. C250 — 25t, car parks, light traffic. B125 — 12.5t, footways. We manufacture B125, C250, and D400.