Many candidates were able to:
- define some given terms used in stair construction;
- produce good sketches of a pitch roof.
However, few candidates were unable to state the uses of walls.
The expected response to question 2 is as given below:
(a) A stair is a series of steps and landing(s) that provide a means of access from one floor level to another.
(b) Terms used in staircase:
(i) Pitch - This is the angle of inclination of the stair with the horizontal plane.
(ii) Headroom: This is the vertical distance between line of the nosings of the stair and the underside or soffit of the upper stair or floor.
(iii)
Waist: This is the least thickness of a reinforced concrete-slab in a stair. Imaginary line joining all the risers together at the bottom and the under side o the stair.
(iv)
Nosing: This is the front edge of a tread projecting beyond the face of the riser.
