Most candidates who attempted this question were able to:
state the reasons for removing vegetable soii from a building site; use sketches to describe methods of preventing collapse of a foundation
trench;
state the functional requirements of a damp proof course in a wall.
However, some of them failed to:
describe the methods of preventing collapse of a foundation trench, state the functional requirements of a damp proof course in a wall.
The expected response to question 4 is as given below:
- (a) Two reasons for removing vegetable soil from a building site are:
- It has a low bearing capacity.
- It may cause settlement of the foundation.
- It contains organic materials which are not suitable for
construction of a building.
- It is combustible.
400
(b)
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TIMBERING TO A TRENCH |
Timber members like poling boards^waiings and struts are arranged in position with folding wedges to keep the sides firmly in position.
Method (ii) Battering of a trench
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- Functional requirements of a damp proof course in a wall:
(i) |
Ability to resist moisture penetration |
(ii) |
It must be resilient. |
(iii) |
It should be durable. |
(iv) |
Ability to withstand heat. |
(v) |
Ability to withstand imposed load, |
(Vi) |
Ability to resist perforation/shear. |
/