Excavation Flashcards
(5 cards)
0
Q
List three types of protection commonly used and providing workers with safety in any trench that is more than 1.5m deep.
A
Shoring
trench boxes
cutbacks
1
Q
An engineer must certify any shoring in trenches deeper then?
A
6 m
2
Q
hard and compact soil walls must be cut back to no less then?
A
30° from the vertical
3
Q
Other soil types must be cut back?
A
At least 45° from the vertical
4
Q
List four things that must be taken into consideration for any excavation over 1.5 m in depth.
A
- soil structure
- weather in moisture conditions
- proximity of other structures and vibration
- placement of waste soil
