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EXCAVATION AND TIMBERING - Is the process of digging out the top vegetable soil on a building...

EXCAVATION AND TIMBERING
EXCAVATION
Is the process of digging out the top vegetable soil on a building site or foundation trench
after setting out process is completed .
Over site / Surface excavation is digging out top soil up to a minimum of 150 mm
Trench excavation is digging out trench up to a reasonable depth to sustain weight of the
building
Excavation can be carried out by hand or by mechanical machines/plants
Hand held tools for excavation
1) Mattock
2) Spade
3) Forkjembe
Mechanical plant
1) Back actor (for trench excavation)
2) Face shovel (front excavation)
3) Grader (leveling
Before any excavation work commence soil investigation must be carried out to assist on
1) Deciding upon the type and size of foundation
2) Method and equipment to be used

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Apr 21 2020 View more View Less

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