- Asked 2/22
- 2081 Baisakh · 5 marks
Rate analysis: 10 cm compacted gravel subgrade
Short answer
Compacted volume is 0.1 m3/m2, loose volume factor 1.30. For 100 m2, gravel 13 m3, unskilled 4 md, skilled 0.5 md, roller 0.5 hr. Rate = Rs 529.58 per m2, excluding VAT.
Prepare analysis of rates for providing, laying and consolidation of 10 cm thick compacted gravel for sub grade per square meter.
Basis
Rate for providing, laying and consolidating 10 cm thick compacted gravel in the sub-grade, worked out for 100 m² and divided for 1 m². Assumptions (illustrative, in the style of Department of Roads norms):
- Compacted volume = 100 x 0.10 = 10.0 m³; loose volume = compacted x 1.30 (compaction factor) = 13.0 m³.
- Water for compaction = 12% of compacted volume = 1.20 m³.
- Labour 0.4 unskilled md per m³ and 0.05 skilled md per m³ of compacted gravel; roller 0.05 hr per m³.
Analysis (per 100 m²)
| Description | Qty | Unit | Rate (Rs) | Amount (Rs) |
|---|---|---|---|---|
| Gravel (sub-base grade), loose 13.00 m³ | 13 | m³ | 3,000.00 | 39,000.00 |
| Labour: spreading, levelling (unskilled) | 4 | md | 900.00 | 3,600.00 |
| Labour: skilled (grade checker / roller operator helper) | 0.5 | md | 1,200.00 | 600.00 |
| Water for compaction (1.20 m³) | 1.2 | m³ | 500.00 | 600.00 |
| 10-t vibrating roller, 0.50 hr | 0.5 | hr | 4,500.00 | 2,250.00 |
| Sub-total | 46,050.00 | |||
| Contractor's overhead and profit | 15% | 6,907.50 | ||
| Total per 100 m² | 52,957.50 |
Answer: Rate = 52,957.50 / 100 = Rs 529.58 per m² (excluding VAT).
✓ Answer checked by Claude Opus 5.5 (high effort)
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