---
title: "Rate analysis: 40 mm PCC 1:2:4 floor"
subject: "Estimating and Costing"
chapter: 4
key: "semester_7/estimating_and_costing:rate-pcc-1-2-4-floor-40mm"
source: https://www.bctengineer.com/q/semester_7/estimating_and_costing/rate-pcc-1-2-4-floor-40mm
site: BCT Engineering
---

# Rate analysis: 40 mm PCC 1:2:4 floor

Estimating and Costing · Chapter 4: Analysis of Rates

- Asked in: 2076 Asoj, 6 marks
- Video: [EP 01 || Analysis of Rate for PCC (1:2:4) work || Estimating & Valuation || in Nepali](https://www.youtube.com/watch?v=eH6f36QvDpU) — Civil Engineering of Nepal
- Answer checked by Claude Opus 5.5 (high effort) on 2026-10-14
- Page: https://www.bctengineer.com/q/semester_7/estimating_and_costing/rate-pcc-1-2-4-floor-40mm
- Whole chapter: https://www.bctengineer.com/md/semester_7/estimating_and_costing/chapter-4

## Question

Prepare an analysis of rate for 40 mm thick PCC (1:2:4) in floor per m².

## Short answer

Per m² of 40 mm PCC (1:2:4): cement 0.253 bag, sand 0.0176 m³, aggregate 0.0352 m³; mason 0.08 day, unskilled 0.20 day; total rate NPR 1,022.50 (direct cost NPR 818.00 plus overhead and profit).

## Answer

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).

#### Quantities per m² of 40 mm PCC (1:2:4)

- Wet volume $= 1 \times 1 \times 0.04 = 0.04$ m³; dry volume $= 1.54 \times 0.04 = 0.0616$ m³
- Cement $= 1/7 \times 0.0616 = 0.00880$ m³ $= 0.253$ bags
- Sand $= 2/7 \times 0.0616 = 0.0176$ m³; aggregate $= 4/7 \times 0.0616 = 0.0352$ m³
- Labour for mixing, laying, compacting, levelling and curing: mason 0.08 day, labourer 0.20 day per m² (assumed norm).

#### Analysis of rate per m²

| Item | Qty | Unit | Rate (NPR) | Amount (NPR) |
|---|---:|---|---:|---:|
| Cement | 0.253 | bag | 1,000.00 | 253.00 |
| Sand | 0.0176 | m³ | 3,500.00 | 61.60 |
| Coarse aggregate (12–20 mm) | 0.0352 | m³ | 4,500.00 | 158.40 |
| Skilled labour (mason, levelling and finishing) | 0.08 | day | 1,500.00 | 120.00 |
| Unskilled labour | 0.20 | day | 1,100.00 | 220.00 |
| Water and curing (lump) | 1 | LS | 5.00 | 5.00 |
| **Direct cost** | | | | **818.00** |
| Contractor's overhead @ 15% | | | | 122.70 |
| Contractor's profit @ 10% | | | | 81.80 |
| **Total (rate per m²)** | | | | **1,022.50** |

**Rate = NPR 1,022.50 per m².**

## Check yourself

The answer's key points as multiple-choice questions, with the correct option and why.

1. What dry volume is used for 1 m^2 of 40 mm PCC?
   A. 0.0616 m^3 (1.54 x 0.04)
   B. 0.04 m^3
   C. 0.0508 m^3 (1.27 x 0.04)
   D. 0.616 m^3
   Answer: A. Wet volume 0.04 m^3 times 1.54. (Key point: Dry volume per m^2)

2. Cement per m^2 for 1:2:4?
   A. 1/4 x 0.0616
   B. 1/6 x 0.0616
   C. 0.0616 x 28.8 = 1.77 bags
   D. 1/7 x 0.0616 = 0.0088 m^3 = 0.253 bags
   Answer: D. Ratio sum is 7. (Key point: Cement)

3. On what are 15% overhead and 10% profit charged?
   A. Material cost only
   B. Final rate including VAT
   C. Direct cost of NPR 818
   D. Labour cost only
   Answer: C. Both are taken on direct cost: 818 + 122.70 + 81.80 = 1,022.50. (Key point: Overhead and profit)

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