Heavy-Duty Soakaway Supplier Spec Check

Tick what your supplier can actually produce for a D400 / trafficked crate. A complete quote answers all six — an incomplete one is the “buried mistake” waiting to happen.

Crate vertical load rating from a compression / vertical-load test reportNot just a “tonne” headline — the tested figure with its basis (short vs long term, vertical vs lateral). EN 124 surface cover class stated separately from the crate ratingD400 rates the cover/grating, not the buried crate. Two different numbers. Cover depth tied to your vehicle class (not a blanket 500 mm)HGV areas typically need 800–1200 mm, engineered to the crush rating. ISO 9001 / 14001 / 45001 factory certificates on requestVerifiable at audit — the O2 trust gap for overseas supply. Stamped shop-drawing and container-loading planConfirms they engineer the scheme, not just ship boxes. Written lead time in the contract + pre-treatment guidance (silt trap / interceptor)Guards against shipping-delay surprises and oil-risk non-compliance.

Spec completeness

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Tick the boxes your supplier can meet.

Get a spec that ticks all six — request a D400 quote