Most candidates were able to:
- state the reasons for bonding blocks in wall construction;
- state the factors to be considered when selecting materials for wall construction;
- state the reasons for providing windows in a building;
- sketch the plan of an open well concrete staircase.
However, few candidates were unable to:
- state the reasons for bonding in wall construction;
- label the plan of an open well staircase.
The expected response to question 3 is given below:
- Reasons for bonding:
- To obtain strength;
- To ensure stability;
- To create an acceptable appearance;
- To avoid continuous vertical joints.
- Factors to be considered when selecting a material for wall construction:
- strength;
- durability;
- moisture resistance;
- cost;
- thermal and sound insulation impermeability;
- aesthetics;
- fire-resistance.
- Reasons for providing windows in a building:
- for viewing;
- for ventilation;
- for protection against weather;
- for aesthetic purpose;
- to let in light.
- Open well staircase:
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