--- title: "Rate analysis: wash basin 800×400" subject: "Estimating and Costing" chapter: 4 key: "semester_7/estimating_and_costing:rate-wash-basin" source: https://www.bctengineer.com/q/semester_7/estimating_and_costing/rate-wash-basin site: BCT Engineering --- # Rate analysis: wash basin 800×400 Estimating and Costing · Chapter 4: Analysis of Rates - Asked in: 2080 Baisakh, 8 marks - 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-wash-basin - Whole chapter: https://www.bctengineer.com/md/semester_7/estimating_and_costing/chapter-4 ## Question Prepare an analysis of rate for providing and fixing wash basin of size (800 × 400) per number. ## Short answer Rate for providing and fixing one 800×400 mm wash basin with CP pillar taps, waste coupling, bottle trap, connections and accessories is NPR 19,812.50 per number, including materials, labour, overhead and profit. ## Answer The rate is for supplying, fixing and testing one wash basin of 800 × 400 mm with fittings, per number. All prices are illustrative market rates (use the local rate list and brand specified); labour is at NPR 1,500 (skilled) and NPR 1,100 (unskilled) per day; overhead 15% and profit 10%. #### Scope of work Wash basin with a pair of brackets or pedestal, two CP pillar taps, waste coupling, bottle trap, flexible connectors, supply connection, waste connection to the drain, fixing to the wall with rawl plugs and screws, jointing with white cement, testing for leakage. #### Analysis of rate per number | Item | Qty | Unit | Rate (NPR) | Amount (NPR) | |---|---:|---|---:|---:| | Wash basin 800 × 400 mm (white vitreous) | 1 | no | 6,500.00 | 6,500.00 | | Pedestal / C.I. brackets (pair) | 1 | set | 900.00 | 900.00 | | CP pillar tap 15 mm | 2 | no | 1,200.00 | 2,400.00 | | CP waste coupling 32 mm | 1 | no | 350.00 | 350.00 | | CP bottle trap 32 mm | 1 | no | 1,100.00 | 1,100.00 | | Flexible connection pipe | 2 | no | 300.00 | 600.00 | | 15 mm GI/PPR supply and 32 mm PVC waste pipe, fittings (lump) | 1 | LS | 900.00 | 900.00 | | Cement, sand, rawl plugs, screws, white cement (lump) | 1 | LS | 400.00 | 400.00 | | Plumber (skilled) | 1.0 | day | 1,500.00 | 1,500.00 | | Mason (skilled) | 0.25 | day | 1,500.00 | 375.00 | | Helper (unskilled) | 0.75 | day | 1,100.00 | 825.00 | | **Direct cost** | | | | **15,850.00** | | Contractor's overhead @ 15% | | | | 2,377.50 | | Contractor's profit @ 10% | | | | 1,585.00 | | **Total (rate per no)** | | | | **19,812.50** | **Rate = NPR 19,812.50 per number** (direct cost NPR 15,850.00). Quantities and rates change with the quality of the fittings; the labour part (plumber 1 day, mason 0.25 day, helper 0.75 day) follows normal DUDBC-type norms for sanitary fixing. ## Check yourself The answer's key points as multiple-choice questions, with the correct option and why. 1. Which is part of the item 'providing and fixing' a wash basin? A. Only supply of the basin B. Construction of the sewer main C. Painting of the room D. Fixing, supply and waste connections and testing for leakage Answer: D. The scope includes basin, brackets, taps, trap, connections, fixing, jointing and testing. (Key point: Scope of the rate) 2. How are overhead and profit applied to reach NPR 19,812.50? A. 15% overhead and 10% profit on the labour only B. 25% on the basin cost only C. 15% overhead and 10% profit on the direct cost of NPR 15,850 D. Overhead 10% and profit 15% on the final total Answer: C. 15,850 + 2,377.50 + 1,585.00 = 19,812.50. (Key point: Overhead and profit) 3. What labour is taken per wash basin? A. Plumber 0.25 day, mason 1 day, helper 0.75 day B. Plumber 1 day, mason 0.25 day, helper 0.75 day C. Plumber 2 days only D. Mason 1 day and helper 1 day Answer: B. The plumber does the main fixing, with mason and helper help as per the DUDBC-type norms. (Key point: Labour norm) 4. Why can the rate differ from one project to another? A. Quantities and rates change with the quality of fittings and the local rate list B. Because overhead is fixed by IOE C. Because the basin size 800 x 400 changes with district D. Because labour is not included Answer: A. The fittings quality and brand specified and local rates change the material costs. 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