See what you have learned about when reinforcement is necessary
Complete the sheet and see how much you know about safety.
There is a risk of collapse of all steep slopes.
Yes
No
Earth which has been excavated before is more stable than virgin earth.
Yes
No
Escape routes such as ladders should be established only in excavations more than 2 metres deep
Yes
No
A hole 5 m deep and without reinforcement should have a 1:2 facility. That is, for every 2 metres you dig down, you should also dig 1 metres across to ensure that the slope is not too steep.
Yes
No
Heavy traffic nearby can cause your excavation to be less stable.
Yes
No
When excavating to depths of 2.25 metres with no facility, the hole must as a minimum be reinforced with clamp with upright plywood sheets behind.
Yes
No
Shoring does not need to stand at the bottom of excavated holes.
Yes
No
When excavating to depths of over 2.25 metres with no facility, reinforcement with extensible planks is required as a minimum .
Yes
No
Shoring is the safest kind of reinforcement there is.
Yes
No
Materials and excavated earth can be placed right up to the edge of the excavated hole.
Yes
No
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