waecE-LEARNING
Technical Drawing Paper 3, Nov/Dec. 2014  
Questions: 1 2 3 4 Main
General Comments
Weakness/Remedies
Strength



Question 4

 

 

The sketch plan of a three bedroom bungalow is shown below.  Study the given specification and the questions that follow.

 

 

 

 

                        FOUNDATION:          675 x 22 concrete strip laid over 50 blinding at a depth
1000 below ground level.
                       
FLOOR:                      300 hardcore;
                                    150 concrete slab;
                                    25 mortar screed.

WALLS:                      All walls are 225 sandcrete hollow blocks with 12 rendering on both sides; floor to ceiling 3000.

LINTELS:                   225 X 225 reinforced concrete.

WINDOWS:                All windows are glazed aluminium sliding type with frame;
                                   
                                    W1 – 1100 x 900  x 25;
                                    W2 – 800 x 700 x  25.

DOOR:                        D1 – 3000 x 2100 aluminium sliding type with frame;
                                    D2 – 900 x 2100 x 40 flush wooden in 100 x 50 timber frames.

PORCH:                     Dwarf wall with coping, 1000 high from floor level; entrance 1500 wide.

ROOF:                        15º Double-pitched with asbestos roofing sheet;
                                    600 eaves projection;
                                    900 x 50 at 800 centres purlin;
                                    150 x 50 rafters;
                                    100 x 50 struts;
                                    150 x 50 tie beam;
                                    250 x 25 fascia board;
                                    50 x 50 at 1200 centres ceiling jost.

  1. Draw, to a scale of 1 : 100, the:
  2. plan;
  3. front elevation.

 

(b)       Draw, to a scale of 1 : 50, a detailed section F-F.

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Observation

Most candidates attempted this question and their performance was okay.  However, some of the candidates could not show the conventional symbols required.

Candidates were expected to do the following:

(a)       Floor Plan

(i)         draw to scale 1:100 (12,825 x 10,725 ± 10);
(ii)        draw the wall (outline);
(iii)       draw the dotted lines;

  1. draw the windows (20);
  2. draw the doors (12);
  3. drawing the cutting plane;
  4. draw the 3 wardropes (WR);
  5. draw the beams (2);
  6. identify 10 apartments;
  7. write floor plan.

 

 

 

 

 

 

 

 

 

 

 

The solution is shown below:

 

 

 

 

 

(ii)        Front Elevation

            (i)         draw to scale 1:100 (12,825 x 5,000 ± 10);
            (ii)        draw the ground line;
            (iii)       draw floor level (dotted line);
            (iv)       draw 4 walls (vertical lines);
            (v)        draw the beam;
            (vi)       draw the railing;
            (vii)      draw 3 conventional sliding windows;
            (viii)     draw a conventional sliding door;
            (ix)       draw the ceiling and roof (4 horizontal lines);
(x)        drawing the fascia board and eaves (4 vertical lines);
(xi)       write front elevation.

The solution is shown below:

                        Candidates were expected to do the following:

                        (b)       SECTIONAL VIEW F – F
           
                                    (i)         draw to scale 1:50 (10,725 x 5,000 ± 10);
                                    (ii)        draw 4 foundation footings and blindings;
(iii)       draw earth filling, hard core, concrete slab and finished floor level;
(iv)       draw ground line (GL);
(v)        draw 4 walls in section with coping;
(vi)       draw a vertical line;
(vii)      draw 2 lintels and a beam;
(viii)     daw 3 flush doors in elevation;
(ix)       draw 1 door in section;
(x)        draw 2 wall plates and ceiling members;
(xi)       draw the roof members (ridge cap, king post, rafters, purlins, tie beam and roofing sheets);
(xii)      show any 4 roof members of the section F – F;
(xiii)     write section F – F.


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