building construction Paper 2 WASSCE (PC), 2017

Question 3

 

(a)        sketch each of the following:
 (i)         buttressed sandcrete block wall;
 (ii)        mass concrete retaining wall.

(b)        sketch a section through a door opening in an  external wall from ground level to the lintel and label the following:
(i) threshold steps;

(ii)ground level;

(iii)door jamb;

(iv)reinforced concrete lintel over door opening;

(v)external wall;

(vi)ground floor slab.

Observation

 

 Majority of the candidates were able to:

  • sketch the buttressed sandcrete block wall  and mass concrete retaining wall.
  • sketch a section through a door opening in an  external wall from ground level to the lintel.

However, many of them failed to label the following parts of a door opening in an
external wall from ground level to lintel:

  • threshold steps;
  • ground level;
  • door jamb;
  • reinforced concrete lintel over door opening;
  • external wall;

The expected response to question 3 is as given below:

b. sketch of a section through a door opening in an external wall from ground level to the

    lintel and labelling of: (i) threshold steps; (ii) ground level; (iii) door jamb;(iv)reinforced  concrete lintel over door opening; (v) external wall; and (vi) ground floor slab.