- 2079 Bhadra · 3+4+3 marks
Load bearing building: excavation, brick, plaster
Short answer
For the assumed 5.0 m × 3.0 m building, excavation for 23 cm walls is 15.23 m³, first-class brickwork in 1:4 is 11.05 m³, and 12 mm inner plaster is 54.48 m².
Find the following quantities for the following items of works from the attached building drawing. The building is a load bearing structure with 23 cm wall all around. A non-load bearing wall of thickness 11 cm divides the living room and the bathroom. The half brick thick wall is not connected to the foundation. a) Earthwork in excavation in foundation b) First class brick work in cement sand mortar (1:4) in super structure. c) 12 mm thick cement plaster in 1:4 c/s mortar in inner (opening schedule door: 2 nos 1.2 × 2.1 m, window 3 nos 1 × 1.1 m) [Building drawing not included in the scanned paper]
No drawing is given, so a layout consistent with the data is assumed: the building is 5.0 m × 3.0 m clear inside (outside 5.46 × 3.46 m), with 230 mm load-bearing walls all around. The 110 mm half-brick partition, placed across the 3.0 m width, divides a living room (3.5 × 3.0 m) from a bathroom (5.0 − 3.5 − 0.11 = 1.39 m, so 1.39 × 3.0 m). The partition is not connected to the foundation, so it has no trench.
Assumed data
- Centre-line length of 230 mm walls = 2[(5.0 + 0.23) + (3.0 + 0.23)] = 16.92 m.
- Trench 0.90 m wide × 1.00 m deep; superstructure height 3.0 m (plinth to slab soffit).
- Openings: 2 doors 1.2 × 2.1 m (one external, one in the partition), 3 windows 1.0 × 1.1 m (external).
a) Earthwork in excavation in foundation
| Item | No. | L (m) | B (m) | H/D (m) | Qty (m³) |
|---|---|---|---|---|---|
| Trench for 230 mm walls only | 1 | 16.920 | 0.900 | 1.000 | 15.228 |
| Total | 15.228 |
b) First class brickwork in 1:4 c/s mortar, superstructure
| Item | No. | L (m) | B (m) | H/D (m) | Qty (m³) |
|---|---|---|---|---|---|
| Outer wall 0.23 × 3.0 | 1 | 16.920 | 0.230 | 3.000 | 11.675 |
| Partition 0.11 (3.0 long × 3.0 high) | 1 | 3.000 | 0.110 | 3.000 | 0.990 |
| Deduct external door 1.2×2.1 | -1 | 1.200 | 0.230 | 2.100 | -0.580 |
| Deduct partition door 1.2×2.1 | -1 | 1.200 | 0.110 | 2.100 | -0.277 |
| Deduct windows 1.0×1.1 (3 nos.) | -3 | 1.000 | 0.230 | 1.100 | -0.759 |
| Total | 11.049 |
c) 12 mm thick 1:4 inner plaster
Inner faces only (rooms, including both faces of the partition):
| Item | No. | L (m) | B (m) | H/D (m) | Qty (m²) |
|---|---|---|---|---|---|
| Living room 3.5 × 3.0, inside perimeter | 1 | 13.000 | 3.000 | – | 39.000 |
| Bathroom 1.39 × 3.0, inside perimeter | 1 | 8.780 | 3.000 | – | 26.340 |
| Deduct external door (living room face) | -1 | 1.200 | 2.100 | – | -2.520 |
| Deduct partition door (both faces) | -2 | 1.200 | 2.100 | – | -5.040 |
| Deduct windows (3 nos.) | -3 | 1.000 | 1.100 | – | -3.300 |
| Total | 54.480 |
Answer: Excavation 15.23 m³; superstructure brickwork 11.05 m³; inner plaster 54.48 m² (assumed layout).
✓ Answer checked by Claude Opus 5.5 (high effort)
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