building construction Paper 3 WASSCE (SC), 2016

Question 1

 

SPECIFICATIONS

FOUNDATION:                   675 x 225 concrete strip foundation laid to a depth of 900
below the ground level.

FLOOR:                                 Earth filling.
                                    Hardcore 300.
Concrete slab 150.
Cement sand screed 25.

WALLS:                                All walls are 225 sandcrete hollow blocks walls.
BEAMS/LINTELS
AND COLUMNS:             225 x 225 reinforced concrete.
ARCHES:                              All arches are semi-circular reinforced concrete type.
Arch 1:            Height – 2500.
Span –   2600.
Arch 2:            Height – 2500.
Span –   2400.

DOORS:                                 D1 – 1200 x 2100 glazed aluminium door.                
                                    D2 – 900 x 2100 panelled wooden door with 100 x 50 hardwood timber frame.
D3 – 750 x 2100 panelled wooden door with 100 x 50 hardwood timber frame.

WINDOWS:                          All windows are glazed aluminium sliding type.
W1 – 1200 x 1200  (3-bays).
W2 –  1200 x 1200 (2-bays).
W3 – 600 x 600  (2-bays).

WARDROBE:                      1575 X 600 X 3000.  
                                                Cloth compartment     - 1575 x 940               
Box   compartment     - 1575 x 1935 

THRESHOLD STEPS:        Width –   1500.                      
Tread   –   300
Rise     –   150.

ROOF:                       Double pitched timber roof with long span aluminium roofing sheets.
Eaves projection          –          750
Pitch                            -           15º
Height from ground floor to ceiling – 3000.

 

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  • Observation

    A good number of candidates did well by:

    -           representing correctly the ground floor elements with conventional symbols;
    -           showing in details, the timber roof structure, right from ceiling b oard to ridge-cap.

    Hower, majority of them failed to:
    -           show the damp-proof course (d.p.c) at 150 mm above ground level;
    -           indicate the 25 mm mortar screed floor finish;
    -           hatch the walls in section and show the 12 mm rendering on both sides.
    The expected response to  question 1 is as given below: