- 2067 Poush (old course) · 18 marks
Building: excavation, brick, plaster (18 marks)
Short answer
Centre-line outer walls 21.00 m, partition shortened at junctions; deductions for openings made. Quantities: excavation 14.62 m³, foundation and plinth brickwork 9.67 m³, inside wall and ceiling plaster 73.13 m², superstructure brickwork 11.34 m³.
Estimate the quantities of the following items of work from the accompanying drawing: a) Earth work in excavation in foundation b) Brick work in foundation and plinth c) Inside wall and ceiling cement plaster d) Brick work in superstructure [Drawing: plan 7230 mm × 3730 mm; 230 mm walls; two rooms with 3270 mm clear spans, 3500 mm bays; doors D 1200 × 2100, D1 1000 × 2100; windows W 1200 × 1200, W1 1200 × 1200; section X-X: roof slab with 18 screed over two layers of tarfelt, 600 mm projection, window 3270 wide, heights 2100/2400/1200/900, DPC, floor: 3 cement sand (1:1) pointing over 36 cement concrete (1:2:4), 75 thick brick bats soling, 150 sand filling; foundation 770 mm wide PCC (1:3:6) with footings, layers 150/250/150/150/80 mm.]
Reading of the drawing
Plan: two rooms 3.27 × 3.27 m clear with 230 mm walls (overall 7.23 × 3.73 m, matching the given 7230 × 3730). Centre-line of the outer walls = 2[(7.23 − 0.23) + (3.73 − 0.23)] = 21.00 m. The central partition is 3.27 + 0.23 = 3.50 m between the outer-wall centre lines; at its two T-junctions it is shortened by half the width of the outer-wall item at each end: trench 3.50 − 0.77 = 2.73 m, step 1 3.50 − 0.69 = 2.81 m, step 2 3.50 − 0.46 = 3.04 m, wall 3.50 − 0.23 = 3.27 m.
Foundation section as marked: PCC 1:3:6 0.77 m wide × 0.15 m, brick step 0.69 × 0.25 m, brick step 0.46 × 0.15 m, 230 mm wall; assumed trench depth 0.80 m; plinth 0.45 m above GL (floor 150 mm sand, 75 mm brick soling, concrete, 1:1 pointing). Wall height 2.4 m above plinth, with door D 1.2 × 2.1 (1), D1 1.0 × 2.1 (1, between rooms), W 1.2 × 1.2 (2), W1 1.2 × 1.2 (1). Plaster 12 mm.
a) Earthwork in excavation in foundation
| Item | No. | L (m) | B (m) | H/D (m) | Qty (m³) |
|---|---|---|---|---|---|
| Trench, outer walls | 1 | 21.000 | 0.770 | 0.800 | 12.936 |
| Trench, partition (3.50 − 0.77) | 1 | 2.730 | 0.770 | 0.800 | 1.682 |
| Total | 14.618 |
b) Brickwork in foundation and plinth
Wall height above step 2 = 0.80 − 0.15 − 0.25 − 0.15 + 0.45 = 0.70 m.
| Item | No. | L (m) | B (m) | H/D (m) | Qty (m³) |
|---|---|---|---|---|---|
| Brick step 0.69 × 0.25 (21.00 + 2.81) | 1 | 23.810 | 0.690 | 0.250 | 4.107 |
| Brick step 0.46 × 0.15 (21.00 + 3.04) | 1 | 24.040 | 0.460 | 0.150 | 1.659 |
| Wall 0.23 × 0.70 to plinth (21.00 + 3.27) | 1 | 24.270 | 0.230 | 0.700 | 3.907 |
| Total | 9.673 |
c) Inside wall and ceiling cement plaster
| Item | No. | L (m) | B (m) | H/D (m) | Qty (m²) |
|---|---|---|---|---|---|
| Inside walls 2 rooms × 2(3.27+3.27) × 2.4 | 1 | 26.160 | 2.400 | – | 62.784 |
| Deduct D (one face) | -1 | 1.200 | 2.100 | – | -2.520 |
| Deduct D1 (both faces) | -2 | 1.000 | 2.100 | – | -4.200 |
| Deduct windows W 1.2×1.2 (2) and W1 (1) | -3 | 1.200 | 1.200 | – | -4.320 |
| Ceiling 2 rooms × 3.27 × 3.27 | 2 | 3.270 | 3.270 | – | 21.386 |
| Total | 73.130 |
d) Brickwork in superstructure
| Item | No. | L (m) | B (m) | H/D (m) | Qty (m³) |
|---|---|---|---|---|---|
| Wall 0.23 × 2.4 above plinth | 1 | 24.270 | 0.230 | 2.400 | 13.397 |
| Deduct D 1.2×2.1 | -1 | 1.200 | 0.230 | 2.100 | -0.580 |
| Deduct D1 1.0×2.1 | -1 | 1.000 | 0.230 | 2.100 | -0.483 |
| Deduct W 1.2×1.2 | -2 | 1.200 | 0.230 | 1.200 | -0.662 |
| Deduct W1 1.2×1.2 | -1 | 1.200 | 0.230 | 1.200 | -0.331 |
| Total | 11.341 |
Answer: Excavation 14.62 m³; foundation and plinth brickwork 9.67 m³; plaster (walls and ceiling) 73.13 m²; superstructure brickwork 11.34 m³.
✓ Answer checked by Claude Opus 5.5 (high effort)
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