Technical Drawing 3, WASSCE (PC 2ND), 2019

Question 4

 

 

The sketch below shows the plan of a bungalow. Study the give specifications and answer the question that follows:


SPECIFICATIONS

All dimensions are given in millimetres.


FOUNDATION:  225 x 675 concrete strip foundation laid over 100 blinding at a depth of 900 below ground level.

 

  • FLOOR: 150 hardcore, 150 concrete slab, 25 mortar screed, finish floor level to ceiling 3150.

  • WALLS: All walls 225.

  • LINTELS: 225 X 225 reinforced concrete.

  • DOORS: All doors 2100 x 900 x 40 flush wooden in 100 x 50 timber frame except at verandah with glazed double door, 2100 x 1500 x 40 in aluminium frame.

  • WINDOWS: Sliding glass in aluminium frames, bath W.C. and store windows 600 x 600, others 900 x 1200.

  • BEAM: 225 x 225 reinforced concrete, 2400 above floor level.

  • COLUMN: 225 X 225 reinforced concrete.

  • ROOF: 25o double pitch with eaves 600 and corrugated asbestos sheets, timber rafter 1000 x 50 at 1000 centres, fascial board 25 x 250.

(Assume unspecified dimension)

 

  1. Draw to a scale of 1:100 the:
    1. Floor plan;
    2. Front Elevation;
  2. Draw to a scale of 1:50, the sectional view on plane Y–Y.

 

Observation

 

 

The plan of a bungalow was given and candidates were to draw the detailed plan, front elevation and detailed section Y-Y.

Most of the candidates attempted this question and were able to draw the detailed plan and front elevation but a few of them could not draw the conve ntional symbols of window and doors properly.

Candidate’s performance was okay.

Candidates were expected to do the following:

 

Floor plan

  1. draw to correct scale (1:100) (18,00* 9,000);
  2. draw the walls;
  3. draw the beams (3);
  4. draw the windos (30);
  5. draw the doors(12);
  6. Draw the compartment(11);
  7. Draw theridge cap
  8. draw the cutting plane Y – Y;
  9. draw the eaves projection;
  10. write floor plan.

                                  

The solution is shown below:

                       


Front Elevation
  1. draw to corret scale;
  2. draw and indicate ground line;
  3. draw the 4 walls;
  4. draw 5 double windows (glass/louvre);
  5. draw 1 beam;
  6. draw fascia board;
  7. draw the roof;
  8. draw the eaves;
  9. write front elevation.

The solution is shown below:

 

VIEW Y-Y
  1. draw to correct scale;
  2. draw the ground line;
  3. draw 3 foundation footings and walls with convention;
  4. draw the earth filling and hard core with convention;
  5. draw the concrete slab and floor finish with convention;
  6. Draw 4 walls in section; ;
  7. Draw 1 walls in elevation;
  8. Draw 2 lintels;
  9. Draw 1 beam;
  10. Draw 1 flush door and1 door in section;
  11. Draw 1 window in section;
  12. Draw the tie beam, wall plates fascia board and ceiling members;
  13. Draw the eaves, roof member (king post, ridge cap, rafter,purlins. Strutand roof cover);
  14. Identify four important parts;
  15. Write sectional view Y – Y.
  16. Neatness

The solution is shown below: