- 2075 Chaitra · 5 marks
Rate analysis: 25 mm 1:2:4 concrete floor
Short answer
For 100 m² of 25 mm thick 1:2:4 floor, wet volume 2.5 m³, dry volume 3.85 m³. Requires cement 15.84 bags, sand 1.10 m³, aggregate 2.20 m³, mason 8 days, labourer 14 days. Adding 15% overhead and 10% profit gives rate NPR 72,687.50 per 100 m² (NPR 726.88/m²).
Prepare analysis of rate for 25 mm thick 1:2:4 cement concrete floor per 100 m². (Assume suitable rate)
Rates and labour norms below are illustrative (DUDBC-style norms; use the current District Rate and norms of the project area for a real estimate): cement NPR 1,000/bag, sand NPR 3,500/m³, 20 mm aggregate NPR 4,500/m³, skilled labour NPR 1,500/day, unskilled labour NPR 1,100/day, water lump sum, contractor's overhead 15% and profit 10% on direct cost (VAT excluded). Aggregate of 12 mm size is taken at NPR 4,800/m³.
Quantities per 100 m²
- Wet volume m³; dry volume m³
- Cement m³ bags
- Sand m³; aggregate m³
- Labour (assumed): mason 8 days, labourer 14 days per 100 m² for laying, levelling, finishing and curing.
Analysis
| Item | Qty | Unit | Rate (NPR) | Amount (NPR) |
|---|---|---|---|---|
| Cement | 15.84 | bag | 1,000.00 | 15,840.00 |
| Sand | 1.100 | m³ | 3,500.00 | 3,850.00 |
| Aggregate (12 mm) | 2.200 | m³ | 4,800.00 | 10,560.00 |
| Skilled labour (mason) | 8.0 | day | 1,500.00 | 12,000.00 |
| Unskilled labour | 14.0 | day | 1,100.00 | 15,400.00 |
| Water and curing (lump) | 1 | LS | 500.00 | 500.00 |
| Direct cost | 58,150.00 | |||
| Contractor's overhead @ 15% | 8,722.50 | |||
| Contractor's profit @ 10% | 5,815.00 | |||
| Total (rate per 100 m²) | 72,687.50 |
Rate = NPR 72,687.50 per 100 m² (NPR 726.88 per m²).
✓ Answer checked by Claude Opus 5.5 (high effort)
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