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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, particularly to components manufactured from grey and ductile irons, cast and manufactured steels, aluminium and concrete. However, the use of other materials is not precluded."
NATA Certification
As part of ACO’s continuous product
development and commitment to quality,
ACO has NATA certified testing equipment
(Licence no. 15193), operated by fully
trained and certified technicians. |
ACO's NATA test rig |
In practice, there are a number of key
factors affecting a cover’s resistance to load:
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i) |
Type of traffic - pedestrians, cars,
trucks, forklifts etc. crossing the cover.
For trolleys and forklifts particularly, consider the weight of loads being
carried. |
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ii) |
Frequency of traffic - more frequent
traffic may require a heavier load class. |
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iii) |
Speed of traffic - fast moving traffic can
intensify the load effect on the cover. |
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iv) |
Position of cover - if the cover is
positioned where traffic will be
turning, braking or if the cover is
installed at the bottom of a ramp, it
will be subjected to extreme forces.
Selecting the right cover and frame is
essential. |
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v) |
Wheel type - solid tyres exert loads
through smaller contact areas than
pneumatic tyres. A heavier duty cover may be required. |
Note: In block paver areas, pavers can decrease the stated loading of the access cover.
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