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Building Construction Paper 2,Nov/Dec. 2013  
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Questions:   2 3 4 5   Main
General Comments
Weakness/Remedies
Strength




Question 3

  1. Explain one reason for bonding blocks in wall construction.
  2. State two factors to be considered when selecting materials for wall construction.
  3. State three reasons for providing windows in a building.
  4. Sketch the plan of an open well concrete staircase and label the following parts:
  1. landing;
  2. open well;
  3. tread;
  4. direction of access.

 

_____________________________________________________________________________________________________
OBSERVATION

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:

 

  1. Reasons for bonding:
  1. To obtain strength;
  2. To ensure stability;
  3. To create an acceptable appearance;
  4. To avoid continuous vertical joints.

 

 

  1. Factors to be considered when selecting a material for wall construction:

-           strength;
-           durability;
-           moisture resistance;
-           cost;
-           thermal and sound insulation impermeability;
-           aesthetics;
-           fire-resistance.

  1. Reasons for providing windows in a building:

 

  1. for viewing;
  2. for ventilation;
  3. for protection against weather;
  4. for aesthetic purpose;
  5. to let in light.
  1. Open well staircase:

 

 

 


               

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