- 2073 Shrawan · 16 marks
Building: excavation, soling, PCC, brick to plinth
Short answer
Earthwork excavation for six column pits and wall trenches: 9.12 m3. Stone soling in foundation: 1.79 m3; sand filling in floor: 7.35 m3. PCC for RCC up to plinth beam (footings, columns, plinth beams): 4.15 m3. Brick infill walls up to plinth: 3.67 m3.
Calculate the following items of work from the attached building drawing. i) Earthwork in excavation ii) Stone soling in foundation and sand filling in floor. iii) PCC for RCC up to plinth beam iv) Brick work up to plinth [Figure: plan 7.90 m × 4.10 m with two rooms 3.5 × 3.5 m, columns 0.30 × 0.30 m, door D 1.0 × 2.1 m, window 1.8 × 1.5 m; wall section 0.35, 0.30, 0.30 m with 0.45 m plinth, 10 cm PCC, 15 cm stone soling, 30 cm sand filling; column footing 0.90 × 0.90 m, footing depth 1.00 m, plinth beam 0.30 × 0.30 m, 10 cm PCC and 15 cm stone soling below footing. Dimensions in metre, not to scale.]
Reading of the figure
Plan 7.90 × 4.10 m = columns 0.30 m + room 3.5 m + column 0.30 m + room 3.5 m + column 0.30 m (and 3.5 + 0.3 + 0.3 across). Six columns 0.30 × 0.30 m on a 3.8 m grid; beams and infill walls form 7 panels of 3.5 m clear (4 along the long sides, 3 across). The sketch is approximate, so these assumptions are made: column footing 0.90 × 0.90 m, 0.30 m thick RCC on 10 cm PCC and 15 cm stone soling, bottom at 1.00 m below GL; 0.30 m thick brick wall panels in a 0.35 m wide trench 0.60 m deep (10 cm PCC + 15 cm soling at the bottom) up to the underside of the 0.30 × 0.30 m plinth beam; plinth top 0.45 m above GL.
i) Earthwork in excavation
| Item | No. | L (m) | B (m) | H/D (m) | Qty (m³) |
|---|---|---|---|---|---|
| Column footing pits 0.90 × 0.90 × 1.00 | 6 | 0.900 | 0.900 | 1.000 | 4.860 |
| Wall trenches 0.35 wide × 0.60 deep (7 panels, 3.8 − 0.9 each) | 7 | 2.900 | 0.350 | 0.600 | 4.263 |
| Total | 9.123 |
ii) Stone soling in foundation and sand filling in floor
| Item | No. | L (m) | B (m) | H/D (m) | Qty (m³) |
|---|---|---|---|---|---|
| Soling 15 cm under footings | 6 | 0.900 | 0.900 | 0.150 | 0.729 |
| Soling 15 cm under wall trenches | 7 | 2.900 | 0.350 | 0.150 | 1.066 |
| Total | 1.795 |
| Item | No. | L (m) | B (m) | H/D (m) | Qty (m³) |
|---|---|---|---|---|---|
| Sand filling 30 cm in two rooms 3.5 × 3.5 | 2 | 3.500 | 3.500 | 0.300 | 7.350 |
| Total | 7.350 |
Soling = 1.795 m³; sand filling = 7.35 m³.
iii) PCC (for RCC) up to plinth beam
Column height from footing top to plinth = 1.00 − 0.10 − 0.15 − 0.30 + 0.45 = 0.90 m.
| Item | No. | L (m) | B (m) | H/D (m) | Qty (m³) |
|---|---|---|---|---|---|
| Footings 0.90 × 0.90 × 0.30 | 6 | 0.900 | 0.900 | 0.300 | 1.458 |
| Columns 0.30 × 0.30 × 0.90 (footing top to plinth) | 6 | 0.300 | 0.300 | 0.900 | 0.486 |
| Plinth beams 0.30 × 0.30, 3.5 m clear (7 panels) | 7 | 3.500 | 0.300 | 0.300 | 2.205 |
| Total | 4.149 |
iv) Brickwork up to plinth
Height below the beam = 0.60 − 0.10 − 0.15 + 0.45 − 0.30 = 0.50 m.
| Item | No. | L (m) | B (m) | H/D (m) | Qty (m³) |
|---|---|---|---|---|---|
| Wall 0.30 thick × 0.50 m high, 7 panels of 3.5 m | 7 | 3.500 | 0.300 | 0.500 | 3.675 |
| Total | 3.675 |
Answer: Excavation 9.12 m³; soling 1.79 m³ and sand filling 7.35 m³; concrete for RCC 4.15 m³ (footings, columns, plinth beams); brickwork to plinth 3.67 m³.
✓ Answer checked by Claude Opus 5.5 (high effort)
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