AS 3996:2019 pdf free download.Slip Resistance Classification Of New Pedestrian Surface Materials.
This Standard specifies requirements for access covers and grates for use in vehicular and pedestrian arcas. It applics to singlc or multi-part acccss covers and grates, where any single cover does not exceed 1300 mm clear opening. This Standard covers products manufactured from grey and ductile iron, cast and manufactured steel, aluminium, concrete and polymeric materials.
This Standard does not consider fire resistance.
he basis for the requirements specified in this Standard is a minimum service life of 25 years for covers and grates made from polymeric materials and 50 years for covers and grates made from all other materials.
his Standard does not apply to the following:
(a)Covers and grates in Classes E, F and G made from polymeric materials.
(b)Covers/grates with any wooden structural component.
(C)Covers and grates of Class D, E, F and G made from grey cast iron.
(d) In-situ structural infill covers.
(e)The hydraulic design of access covers and grates.
(f)Multi-part units that require fittings such as removable beams.
(g)Applications with heavy point design loads greater than those specified are not covered in this Standard.
1.4 DEFINITIONS
For the purpose of this Standard, the definitions below apply
1.4.1 Access chamber (also known as maintenance hole
A chamber that a person can enter to conduct inspections, testing, maintenance and the like.
1.4.2 Access cover
An openable cover for the purpose of gaining access to conduct inspections, testing or remove obstructions. Access covers may be placed over inspection chambers and access chambers.
1.4.3 Batch
A population of product, of known history, that enables verification that the product was made from known materials at essentially the same time by essentially the same processes and under essentially the same system of control.
1.4.4 Batch release test
A test performed on a batch of components to verify conformance to test criteria before the batch can be released.
1.4.6 Clear opening
An unobstructed opening for access, in service, and without removable supporting beams in place.
1.4.7 Depth of insertion
The depth from the top of the frame to the horizontal seating.
1.4.8 Fastening device
A device that includes features to prevent or largely restrict one or more of the following:
(a)Relative movement between a grate or cover and the frame.
b)The grate or cover being dislodged from the frame under traffic. (c)Opening of the grate or cover without the use of a tool.
14.9 Grate
A grid of metal or other suitable material placed over an opening, to allow the entry of water while providing protection and support for pedestrians or vehicles passing over it.
1.4.10 Hinge
A device with a means of pivoting that joins a cover or grate to the frame.