--- title: "Single room: excavation, brickwork, plaster, shutter" subject: "Estimating and Costing" chapter: 6 key: "semester_7/estimating_and_costing:single-room-b" source: https://www.bctengineer.com/q/semester_7/estimating_and_costing/single-room-b site: BCT Engineering --- # Single room: excavation, brickwork, plaster, shutter Estimating and Costing · Chapter 6: Detailed Estimate - Asked in: 2082 Baisakh, 3+4+3+3 marks - Video: [Estimation - One Room](https://www.youtube.com/watch?v=H1ave9qR5e0) — Civiconcepts - Bhushan Mahajan - Answer checked by Claude Opus 5.5 (high effort) on 2026-10-14 - Page: https://www.bctengineer.com/q/semester_7/estimating_and_costing/single-room-b - Whole chapter: https://www.bctengineer.com/md/semester_7/estimating_and_costing/chapter-6 ## Question From the attached plan and section (Figure 2) of single room building, estimate the quantities. i) Earthwork in excavation ii) Brickwork in 1:6 c/s mortar up to plinth level iii) 12.5 mm thick plastering in room and ceiling iv) Door window shutter (assume door window frame is 0.1 m × 0.1 m) [Figure 2 not included in the scanned paper] ## Short answer Assuming room 4.0×3.0 m clear, centre-line 14.92 m. Earthwork in 0.9×1.0 m trench = 13.43 m³. Brickwork to plinth: two footing steps (0.69 and 0.46 m wide ×0.15 m) plus 0.95 m wall, total 5.83 m³. Plastering (walls+ceiling): 49.02 m². Shutters: door 1.60 m², windows 2×1.00 m², total 3.60 m². ## Answer No figure is available, so a **single room** is assumed: 4.0 m × 3.0 m clear, walls 230 mm, centre-line length = 2(4.0 + 3.0 + 2 × 0.23) = 14.92 m. #### Assumed data - Trench 0.90 m wide × 1.00 m deep; PCC 200 mm; two brick footing steps (0.69 m and 0.46 m wide, 150 mm high each); plinth 0.45 m above GL. - Wall (0.23 m) from top of last step to plinth top = 1.00 − 0.20 − 0.30 + 0.45 = 0.95 m. - Ceiling height 3.0 m; one door 1.0 × 2.1 m, two windows 1.2 × 1.2 m. #### i) Earthwork in excavation | Item | No. | L (m) | B (m) | H/D (m) | Qty (m³) | |---|---|---|---|---|---| | Trench, all walls (centre-line) | 1 | 14.920 | 0.900 | 1.000 | 13.428 | | **Total** | | | | | **13.428** | #### ii) Brickwork in 1:6 c/s mortar up to plinth level | Item | No. | L (m) | B (m) | H/D (m) | Qty (m³) | |---|---|---|---|---|---| | Brick footing step 1 (0.69 m wide) | 1 | 14.920 | 0.690 | 0.150 | 1.544 | | Brick footing step 2 (0.46 m wide) | 1 | 14.920 | 0.460 | 0.150 | 1.029 | | Wall up to plinth | 1 | 14.920 | 0.230 | 0.950 | 3.260 | | **Total** | | | | | **5.834** | #### iii) 12.5 mm plastering in room and ceiling | Item | No. | L (m) | B (m) | H/D (m) | Qty (m²) | |---|---|---|---|---|---| | Inside walls, 2(4.0+3.0) × 3.0 | 1 | 14.000 | 3.000 | – | 42.000 | | Deduct door | -1 | 1.000 | 2.100 | – | -2.100 | | Deduct windows | -2 | 1.200 | 1.200 | – | -2.880 | | Ceiling 4.0 × 3.0 | 1 | 4.000 | 3.000 | – | 12.000 | | **Total** | | | | | **49.020** | #### iv) Door and window shutters Frame 0.1 m × 0.1 m, so the shutter is smaller than the opening by one frame width at each vertical side and the head. - Door shutter = (1.0 − 2 × 0.1) × (2.1 − 0.1) = 0.80 × 2.00 = **1.60 m²** - Window shutters = 2 × (1.2 − 0.2) × (1.2 − 0.2) = 2 × 1.00 = **2.00 m²** - Total shutter area = **3.60 m²** **Answer:** Excavation 13.43 m³; brickwork to plinth 5.83 m³; plastering 49.02 m²; shutters 3.60 m² (assumed dimensions). ## Check yourself The answer's key points as multiple-choice questions, with the correct option and why. 1. How is the excavation 13.428 m3 computed? A. 14.92 x 0.90 x 1.00 B. 14.00 x 0.90 x 1.00 C. 14.92 x 0.23 x 1.00 D. 14.92 x 0.90 x 0.95 Answer: A. Centre-line 14.92 m x trench width 0.9 m x depth 1.0 m. (Key point: Trench volume) 2. What does brickwork up to plinth include? A. Two footing steps and wall up to plinth B. Only wall C. Walls to ceiling D. PCC Answer: A. Two footing steps plus 0.95 m of wall: 5.834 m3. (Key point: Brickwork to plinth) 3. What does the plaster quantity include? A. Walls less openings plus ceiling B. Walls only C. Ceiling only D. Walls plus openings Answer: A. Inside walls with door and windows deducted, plus 12 m2 of ceiling. (Key point: Plastering items) 4. How big is the shutter of door 1.0 x 2.1 with a 0.1 m frame? A. 0.80 x 2.00 = 1.60 m2 B. 1.0 x 2.1 = 2.10 m2 C. 0.90 x 2.0 D. 0.80 x 2.10 Answer: A. Frame is deducted on each vertical side and head: (1.0 - 0.2) x (2.1 - 0.1). (Key point: Shutter size) ## Related in Estimating and Costing - [Two-room building: brick plinth, door shutters, plaster](https://www.bctengineer.com/question.md?key=semester_7%2Festimating_and_costing%3Abuilding-m-two-room-three-items) — Estimating and Costing, chapter 6 - [Two-room building: excavation, PCC, brick, plaster](https://www.bctengineer.com/question.md?key=semester_7%2Festimating_and_costing%3Abuilding-h-two-room-fig1) — Estimating and Costing, chapter 6 - [Building: excavation, brick, paneled door, plaster](https://www.bctengineer.com/question.md?key=semester_7%2Festimating_and_costing%3Abuilding-p-four-items) — Estimating and Costing, chapter 6 - [Double room: excavation, CRS, brick, plaster](https://www.bctengineer.com/question.md?key=semester_7%2Festimating_and_costing%3Adouble-room-d) — Estimating and Costing, chapter 6 - [One-roomed building: earthwork, plaster, openings](https://www.bctengineer.com/question.md?key=semester_7%2Festimating_and_costing%3Aone-room-a-fig-c) — Estimating and Costing, chapter 6 - [Building: brick 1:6, ceiling plaster, PCC](https://www.bctengineer.com/question.md?key=semester_7%2Festimating_and_costing%3Abuilding-l-fig1-ceiling-plaster) — Estimating and Costing, chapter 6 ## Related in other subjects - [Single-room wall: brick strength and mortar](https://www.bctengineer.com/question.md?key=semester_5%2Fconcrete_technology_and_masonry_structure%3Awall-single-room-8000kg) — Concrete Technology and Masonry Structure, chapter 8 - [Single-storey external wall: stress, brick, mortar](https://www.bctengineer.com/question.md?key=semester_5%2Fconcrete_technology_and_masonry_structure%3Awall-single-storey-100kn-12mm) — Concrete Technology and Masonry Structure, chapter 8