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Maintenance (or access) holes and cable trunking runs are enclosed with access covers arranged in a multipart or trench run configuration. These enclosures are
large reinforced concrete structures, sized according to the cable arrangement
and may also be used to cater for the co-existence of other services/utilities or
house equipment.

The design of these underground spaces are bound by the wiring rules set out in AS/ACIF S009. AS/NZS 3084 also offers some basic guidelines.

The construction of these underground spaces are usually fabricated on site or supplied as precast reinforced structures.

ACO’s access covers are designed to be installed above them in a multipart or trench run configuration (trench run multiparts).

For a list of standard or custom sizes; installation guidelines and support services:

Click here for Galvanised access covers (load class B 80kN)
Click here for Rhinocast® ductile iron access covers (to Class G900kN)

 

Larger cable enclosures

Larger cable enclosures

Rhinocast® multipart access cover systems

Cast in-situ or precast concrete enclosure

Cable trunking systems

Rhinocast® Trench run multipart

Cast in-situ enclosure

Due to the number of removable components including beams and individual covers, multipart access covers by their very design cannot be made water tight. This is why      AS 3996-2006: Access covers and grates excludes large access cover systems from its scope. AS 3996-2006 requires compliance in a number of areas including gas and water tightness. ACO multipart covers are suitable for applications requiring general weather resistance on well drained enclosures. A reasonable degree of weather resistance can be achieved by sealing edges of covers, frame interfaces and lifting holes each time the cover is removed for servicing.

For applications requiring frequent access, ACO’s Servokat Assist lift covers are recommended.
Visit http://www.acoaus.com.au/access/assisted_lift.htm