Minimum Requirement for Private Property Installation for The Green Pipe
Site Preparation:
Trenches should be excavated as narrow as practical to allow efficient installation.All rocks, tree roots and other hard objects should be removed.
When installation is under an embankment the same precautions as above should be adopted where possible.
Trench depth:
Minimum cover depths are determined by the proposed load that you intend the pipes to handle. The depths shown below are for legal axle loads as advised by State or Federal road authorities.
Trench width:
The width of the trench should be kept to the minimum necessary to ensure safe working whilst ensuring stable compaction and reduce installation costs.
If you have unstable soil conditions it may be necessary to shore up trench walls or cut a sub-trench in the floor of your main trench.
The minimum cover & width you should allow for adequate compaction and load protection.
Bedding Material
Wherever necessary bedding material must be added to the bottom of the trench to ensure uniform support along its entire length.
Holes should be dug under the bell-mouth ends or joints to provide even support along the pipe.
Bedding should be laid in a continuous layer, 75mm thick, of materials, which comply with the following:
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