Load Class Selector

Three answers about what sits above the tank, and what water is supposed to do inside it. Load class follows the traffic map, not the site boundary.

What crosses the tank

Invert depth available

What the water does

Recommended Configuration

—

Nominal load—

Material—

Height—

Build-up—

Request drawings for this configuration

Nominal load class is a property of the module. Whether an installed tank satisfies AASHTO H-20 or HS-25 depends on cover depth, bedding, backfill compaction, safety factors and traffic-rated access covers, and is assessed by your engineer of record against local requirements. This tool narrows the specification. It does not approve it.