building construction Paper 3 WASSCE (PC 2ND), 2019

 


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.
    • Mortar screed 25.

    • STAIRCASE:
      • Reinforced concrete stair.
      • Width 750;
      • Rise (riser) 150;
      • Going (tread) 225;
      • Waist 100;
      • Total rise 3000;
      • Total going 2025.

    • WALLS: All walls are 225 sandcrete hollow block walls except the stair enclosimg wall which is 150 thick.

    • BEAMS/LINTELS AND COLUMNS: 225 x 225 reinforced concrete.

    • ARCHES: All arches are semi-circular reinforced concrete type.
      • Arch 1:
        • Height – 2400.
        • Span – 2540.
      • Arch 2:
        • Height – 2400.
        • Span – 2530.
      • Arch 3:
        • Height – 2400.
        • Span – 1200.

    • 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: 1575 X 600 X 3000.
      • 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.

     

     

    Question 1

    To a scale of 1:50, draw the detailed section X – X of the building from the foundation toroof.

Observation

 

 

The candidates did well by:


- showing the walls in section correctly; - representing the ground floor elements with their conventional symbols;
- representing the timber roof-structure members properly.

However, good number of them failed to:

- show the panel doors in elevation;
- ringbeams and ragbolts;
- mortar screed floor finish.
The expected response to  question 1(a) is as given below:


1(a)

 


    1. CHARACTERSTICS OF AN ENTREPRENEUR IN THE BUILDING INDUSTRY
       Risk bearer: - the risk associated with the investor putting his/her capital into the construction business.
       Organization:- the act of organizing productive resources for completion of project.
       Decision – making: - taking decisions that promote effective growth of the industry.
       Control:- having the authority to direct the affairs of the industry to achieve project target.