StormGrid Load-Grade & Cover-Depth Selector

Load grade should follow the finished surface and the depth the crate sits at — not the price list. Answer two questions to see which grade the build-up points to, and which of the two constraints is actually driving the answer.

1. What is the finished surface above the crate field?

Landscape, gardens, non-trafficked Footpath or communal green space Driveway, light parking, commercial hardstanding Heavy-duty car park or estate road

2. How much cover sits between the finished surface and the top of the crate?

Under 1 m 1–2 m 3 m or more 4–5 m

Answer both questions first.

Request a detailed load-grade and cover-depth check

Boundary honesty. A load class is a design designation, not a trafficability certificate. Cover depth, pavement build-up and a structural engineer’s design to CIRIA C737 together decide what a buried crate field can carry. Beyond 5 m of cover this selector stops — that is project-specific structural design, not a grade lookup.