ACO has independently measured, by experimentation, the hydraulic intake capacities of ACO Drain grates. Tests were carried out under varying flow rates and catchment approach slopes. To determine the hydraulic utilisation, each grate was tested until bypass occurred (point at which liquids would pass across grate).

The Grating Intake Calculator (GIC) provides information on the intake efficiency of the chosen grate. If the required liquid intake is greater than the grate’s performance, the extent of bypass (or failure) will be calculated. (click here for more info)

To generate results from the ‘GIC’ program the following information is required:

	Length of trench run (metres)
	Length and width of catchment area (metres)
	Position of trench in catchment area
	Surrounding pavement/surface type, e.g., concrete, asphalt, etc.
	Rainfall intensity (mm/hr)
	Perpendicular approach slopes to trench (%)
	Preferred grate type

Results are provided either electronically (PDF) and/or in printout format.

To request this service, click here.