StormGrid Load-Class Selector

Match a site’s traffic to a StormGrid design load class and an indicative cover-depth band. The crate grade is a design input; final cover depth is engineered to your vehicle load and ground conditions to CIRIA C737.

What runs over the tank? the heaviest regular loading, not the average

Ground / system type decides wrap and whether it stores or infiltrates

Recommended grade

SG-M40

Design load class400 kN/m² (40 t/m²)

MaterialRecycled PP

System build-upGeomembrane-lined

Indicative cover depth~600–800 mm

Download the load-class datasheet →

Cover depth is indicative only and confirmed by structural design. Grades shown are design nominal values from the StormGrid specification.