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Working near Telstra underground cables
Prior to any site works taking place it’s always a good idea to obtain a plan of Telstra’s underground network to make sure you don’t accidentally damage any underground cabling near or on your work site.
Saturday, 01st June 2019
Find out who to talk to and what to look for in relation to telephone cabling. The location of underground cables can usually be easily sourced via Dial Before You Dig or by calling 1100.
Once you know what you’ve got, you then need to know the restrictions on working near telephone cables.
Working distances
Telstra requires the following minimum distances to be maintained at all times during any construction activity. However, where these distances cannot be maintained the person responsible needs to contact the Network Integrity Help Desk on 1800 653 935 (7.00am – 7.00pm AEST) and discuss alternative protection options.
| Construction Activity | Distances |
| Jackhammers / pneumatic breakers | Not within 1.0m of actual location |
|
Vibrating plate of Wacker Packer compactor | Not within 0.5m of Telstra ducts. 300mm compact clearance cover before compactor can be used across Telstra ducts |
| Boring equipment (in-line, horizontal and vertical) | Not within 2.0m of actual location. Constructors to hand dig (pothole) and expose plant |
| Heavy vehicle traffic (over 3 tonnes) | Not to be driven across Telstra ducts (or plant) with less than 600mm cover. Constructor to check depth via hand digging |
|
Mechanical excavators, boring and tree removal | Not within 1.0m of actual location. Constructor to hand dig (pothole) and expose plant |
Minimum cover
Once the construction works are completed, Telstra requires conduit to have a minimum cover depth depending on the location.
| Location | Depth |
| Footway | Minimum 450mm |
| Roadway | Roadway Minimum 450mm at drain invert and 600mm at road centre crown |
To find out more, contact HIA’s Building Services team.
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