- 2075 Asoj · 4×3 marks
Building: brick 1:6, ceiling plaster, PCC
Short answer
For L-shaped two-room building: brickwork in 1:6 mortar up to plinth 12.53 m³, 10 mm ceiling and soffit plaster 45.88 m², and PCC (1:3:6) in foundation 3.69 m³.
Find the following quantities from the attached building drawing (Fig. 1): a) Brick work in 1:6 cement sand mortar up to plinth. b) 10 mm thick cement plastering in ceiling and underside of roof projection. c) PCC (1:3:6) in foundation. [Fig. 1: two-room building. Room A 3600 × 4800 mm and Room B 3600 × (about 3000) mm with doors D1, D2 and windows W1, W2 (sizes 1000/1500/1200 mm as marked); external walls 350 mm, partition 230 mm; roof slab with projection; foundation sections for 350 and 230 mm walls with footing, concrete and plinth; floor: 3 mm cement punning 1:4, 40 mm screed 1:4, 75 mm PCC 1:4:8, 150 mm sand filling, earth filling. The scan is rotated and hard to read.]
Reading of the figure (scan unclear, so assumptions are stated)
Room A is 3.6 × 4.8 m and Room B is 3.6 × 3.0 m (clear). External walls are 350 mm and the partition 230 mm. Overall length = 0.35 + 3.6 + 0.23 + 3.6 + 0.35 = 8.13 m; overall depth = 4.8 + 0.70 = 5.50 m on the Room A side and 3.0 + 0.70 = 3.70 m on the Room B side, so the building is L-shaped. The roof slab follows the building outline with a 0.60 m projection all round (assumed, since the projection is not stated).
Foundation sections (as for the matching drawing): external wall: trench 0.90 m wide × 0.90 m deep, concrete 0.15 m, footings 0.59 × 0.13 m and 0.47 × 0.13 m, then 0.35 m wall; internal wall: trench 0.75 m × 0.75 m, concrete 0.13 m, footings 0.47 × 0.13 and 0.35 × 0.13, then 0.23 m wall; plinth 0.45 m above GL.
Centre-line lengths: external walls = back 7.78 + left 5.15 + right 3.35 + front A 3.775 + front B 3.775 = 23.83 m; partition = 4.80 m. (The small overlaps where the internal-wall foundation meets the external-wall foundation are neglected.)
a) Brickwork in 1:6 CM up to plinth
Wall heights: external = 0.90 − 0.15 − 0.13 − 0.13 + 0.45 = 0.94 m; internal = 0.75 − 0.13 − 0.13 − 0.13 + 0.45 = 0.81 m.
| Item | No. | L (m) | B (m) | H/D (m) | Qty (m³) |
|---|---|---|---|---|---|
| Ext. footing 1: 0.59 × 0.13 | 1 | 23.830 | 0.590 | 0.130 | 1.828 |
| Ext. footing 2: 0.47 × 0.13 | 1 | 23.830 | 0.470 | 0.130 | 1.456 |
| Ext. wall 0.35 × 0.94 | 1 | 23.830 | 0.350 | 0.940 | 7.840 |
| Int. footing 1: 0.47 × 0.13 | 1 | 4.800 | 0.470 | 0.130 | 0.293 |
| Int. footing 2: 0.35 × 0.13 | 1 | 4.800 | 0.350 | 0.130 | 0.218 |
| Int. wall 0.23 × 0.81 | 1 | 4.800 | 0.230 | 0.810 | 0.894 |
| Total | 12.530 |
b) 10 mm cement plaster in ceiling and underside of roof projection
The projection soffit is a 0.60 m strip along the outer perimeter plus the corner squares. For an L-shaped plan the perimeter equals that of the enclosing rectangle, 2(8.13 + 5.50) = 27.26 m, and the net number of corner squares is 4.
| Item | No. | L (m) | B (m) | H/D (m) | Qty (m²) |
|---|---|---|---|---|---|
| Room A ceiling 3.6 × 4.8 | 1 | 3.600 | 4.800 | – | 17.280 |
| Room B ceiling 3.6 × 3.0 | 1 | 3.600 | 3.000 | – | 10.800 |
| Projection soffit: 27.26 × 0.60 | 1 | 27.260 | 0.600 | – | 16.356 |
| Projection corners 0.60 × 0.60 | 4 | 0.600 | 0.600 | – | 1.440 |
| Total | 45.876 |
c) PCC (1:3:6) in foundation
| Item | No. | L (m) | B (m) | H/D (m) | Qty (m³) |
|---|---|---|---|---|---|
| PCC external walls (0.90 wide × 0.15) | 1 | 23.830 | 0.900 | 0.150 | 3.217 |
| PCC internal wall (0.75 wide × 0.13) | 1 | 4.800 | 0.750 | 0.130 | 0.468 |
| Total | 3.685 |
Answer: Brickwork to plinth 12.53 m³; ceiling and projection soffit plaster 45.88 m²; foundation PCC 3.69 m³ (assumed details).
✓ Answer checked by Claude Opus 5.5 (high effort)
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