Loading refers to the type of traffic the drain is exposed to.

Load Standards AS 3996

Clause 1.1 Scope
“This standard specifies requirements for access covers and grates for use in vehicular and pedestrian areas. It applies to access covers & grates having a clear opening of up to 1300mm...”

ACO believes that EN 1433: Drainage Channels for Vehicular and Pedestrian Areas, also provides a good measure of performance.

The load classes of both codes are shown in the table below.