building construction Paper 3 WASSCE (SC), 2018

Question 4

 

 To a scale of 1:20, draw the detailed of the stair at section Y-Y from the hardcore level to first floor slab , and indicate the following:

  1. tread;
  2. waist;
  3. landing slab;
  4. main reinforcement bars;
  5. distribution bars

Observation

 

Majority of them did well by:
-           using the apppropriate conventional symbols to represent the ground floor elements in 
section i.e. harfdcore, substructural walls and the concrete floor slab.
-           showing both flights of stair having uniform tread and risers.
However,many of the candidates that attempted this questions failed to:

-           show in complete details, the sandcrete block walls with rendering/plastering
-           show the steel reinforcement details such as, main bars, distribution bars and crank bars.
-           show the first floor slab in section.

The expected response to question 4 is as given below: