- 2082 Bhadra
One-roomed building: earthwork, plaster, openings
Short answer
Centre-line length 13.48 m. Earthwork: 0.6 m wide ×0.9 m deep trench, volume 7.28 m³. 12 mm plaster: inside 32.65 m², outside 43.14 m², total 75.79 m². Door/window: frames 0.087 m³ timber; shutters 2.10 m² (door) and 1.20 m² (windows), total 3.30 m² (assumed details).
Prepare detailed estimate for the following items of works for one-roomed building: (Use fig.c) a) Earthwork in excavation. b) 12 mm thick plaster work inside and outside the building. c) Door and windows frame and shutters. [Figure c: One-roomed building. Ground floor plan: external length 4200 mm and width 3000 mm (plus 1200 projection), wall 230 mm thick, offsets 2000, 2000, 470, 600, 470, 230 mm, door D1 1000 × 2100 mm, windows W1 600 × 1000 mm, 4000 mm and 1400 mm room dimensions. Section X-X: height 2650 mm, plinth 450 mm, 300 × 300 mm plinth tie-beam, M20 RCC slab 125 mm with 600 mm projection, brickwork (1:6) above plinth, stone masonry in foundation, PCC (1:2:4) 75 mm with brick soling and compacted earth, foundation width 600/400/300 mm. All dimensions in mm; details approximate.]
The figure is approximate, so the following reading is used: building 4.2 m × 3.0 m outside, walls 0.23 m; one door D1 1.0 × 2.1 m; two windows W1 0.6 × 1.0 m (number assumed); inside height 2.65 m; plinth 0.45 m; RCC slab 125 mm. The 1200 mm projection is taken as a slab canopy and is not walled.
Centre-line length = 2[(4.2 − 0.23) + (3.0 − 0.23)] = 13.48 m.
a) Earthwork in excavation
Foundation (stone masonry, widths 600/400/300 mm) needs a trench 0.60 m wide; assumed depth 0.90 m (75 mm soling, 75 mm PCC 1:2:4, masonry above).
| Item | No. | L (m) | B (m) | H/D (m) | Qty (m³) |
|---|---|---|---|---|---|
| Trench, centre-line | 1 | 13.480 | 0.600 | 0.900 | 7.279 |
| Total | 7.279 |
b) 12 mm plaster, inside and outside
Inside perimeter = 2(3.74 + 2.54) = 12.56 m; outside perimeter = 2(4.2 + 3.0) = 14.40 m. Outside height taken from GL to top of slab edge = 0.45 + 2.65 + 0.125 = 3.225 m.
Inside:
| Item | No. | L (m) | B (m) | H/D (m) | Qty (m²) |
|---|---|---|---|---|---|
| Inside wall | 1 | 12.560 | 2.650 | – | 33.284 |
| Deduct door | -1 | 1.000 | 2.100 | – | -2.100 |
| Deduct windows | -2 | 0.600 | 1.000 | – | -1.200 |
| Add reveals, door (3 sides × 0.23) | 1 | 1.196 | – | – | 1.196 |
| Add reveals, windows | 2 | 0.736 | – | – | 1.472 |
| Total | 32.652 |
Outside:
| Item | No. | L (m) | B (m) | H/D (m) | Qty (m²) |
|---|---|---|---|---|---|
| Outside wall (plinth + wall + slab edge) | 1 | 14.400 | 3.225 | – | 46.440 |
| Deduct door | -1 | 1.000 | 2.100 | – | -2.100 |
| Deduct windows | -2 | 0.600 | 1.000 | – | -1.200 |
| Total | 43.140 |
Total plaster = 32.65 + 43.14 = 75.79 m².
c) Doors and windows
Frame section assumed 100 × 75 mm.
| Item | Working | Quantity |
|---|---|---|
| Door frame (2 × 2.1 + 1.0) | 5.2 × 0.10 × 0.075 | 0.0390 m³ |
| Window frames, 2 nos. (2 × 1.0 + 2 × 0.6) | 2 × 3.2 × 0.10 × 0.075 | 0.0480 m³ |
| Door shutter | 1.0 × 2.1 | 2.10 m² |
| Window shutters | 2 × 0.6 × 1.0 | 1.20 m² |
Answer: Excavation = 7.28 m³; plaster = 75.79 m²; frames = 0.087 m³ of timber; shutters = 3.30 m².
✓ Answer checked by Claude Opus 5.5 (high effort)
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