Technical Drawing 3, May/June 2015

Question 4

(4)        The sketch below shows the floor plan of a twin three bedroom bungalow in the line diagram. Study the given specifications and answer the questions that follow:

FOUNDATION: 67 x 225 concrete strip foundation at a depth 800 from ground level.

FLOOR: 200 hardcore; 150 thick concrete floor; 25 cement sand screed.

WALL: All walls are 225 hollow sandcrete blocks with 12 rendering on both sides.

LINTEL: 225 x 225 reinforced concrete.

DOOR: All doors are flush wooden. D – 2100 x 900 x 38 in 100 x 50 timber frame.

WINDOWS: All windows are sliding glazed sash in aluminium frames. W1 – 800 x 500; W2 – 1200 x 1100.

ROOF: 300 double pitch with 13 corrugated asbestos sheet; rafter – 100 x 50 at 1200 centres; purlins – 100 x 50 at 1000 centres; kingpost and strut – 100 x 50; wall plate – 100 x 75; tie beam – 100 x 50; ceiling joist – 50 x 50 at 1200 centres; floor to ceiling height 3150.

Assume suitable dimensions where necessary

(a) Draw, to a scale of 1:100, the following views of the building:

(i) floor plan;

(ii) left side elevation.

(b) On a scale of 1:50, draw a detailed section P – P of the building.  

Observation

(A)        FLOOR PLAN

  1. draw to scale 1:100;
  2. draw the outline (walls);
  3. draw 36 windows for both flats;
  4. draw 22 doors for both flats;
  5. draw the ridge;
  6. draw 3 beams;
  7. draw the cutting plane P – P;
  8. identify the apartments;
  9. write floor plan;
  10. draw neatly.

 

(B)        LEFT SIDE ELEVATION

  1. draw to scale;
  2. draw the Ground Level (GL);
  3. draw the floor level;
  4. draw 4 windows (2 big and 2 small);
  5. draw the roof;
  6. draw 3 beams;
  7. draw the ridge cover;
  8. draw the fascia board;
  9. draw the eaves;
  10. write left side elevation;
  11. draw neatly.

 

(C)        SECTION P-P

  1. draw to scale 1:50;
  2. draw the ground line;
  3. draw four (4) foundation footings;
  4. draw the earth; hard core, concrete slab and screed;
  5. draw four (4) foundation walls with conventions ;
  6. draw four (4) walls in section;
  7. draw three (3) lintels;
  8. draw two (2) windows in section;
  9. draw one (1) door in section;
  10. draw two (2) flush doors in elevation;
  11. draw two (2) wall plates;
  12. draw the eaves projection and facia board;
  13. draw the tie beam and ceiling board;
  14. draw the rafter, purlins, kingpost and strut;
  15. draw roof cover at 30o (double pitch);
  16. show any six (6) labels;
  17. write section P – P;
  18. draw neatly.

FLOOR PLAN