Drainage Design - Drainage Grates - Stormwater Grates

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Grates Field Inlet

Field Inlet Grates (0.2MB PDF FILE)

General description
The Manning grate, is used in areas frequented by pedestrians. The Telford is used in areas that are mowed, where clippings may clog Manning openings. Both are ductile iron. The undercut Telford bars are designed to limit the possibility of debris becoming wedged in the larger openings.

AS 3996 Compliance

Material and manufacturing quality.
Manning, Class D load capacity.
Telford, Class C load capacity.
Bicycle safety
Pedestrians – Manning, 17mm slots, conservatively satisfy Clause 3.3.5, Pedestrian Safety requirements

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