Ground conditions
Why Trenches Collapse in Perth Sand, and How to Dig Them Anyway
Bassendean and Spearwood sands have almost no cohesion. Here is what that means for trench walls, footings and pool digs, and the techniques that keep...
Ground, weather, rules and machines, written for the people doing the work.
Ground conditions
Bassendean and Spearwood sands have almost no cohesion. Here is what that means for trench walls, footings and pool digs, and the techniques that keep...
Ground conditions
The coastal limestone that runs the length of Perth's coast is soft enough to cut and hard enough to stop a small excavator dead. How to recognise it,...
Ground conditions
The Hills are the opposite of the coastal plain. Gravel that sets like concrete in summer, clay that clogs a bucket in winter, and granite that turns...
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