---
title: "Units: sunshade, shutters, grills, AC sheet"
subject: "Estimating and Costing"
chapter: 1
key: "semester_7/estimating_and_costing:units-sunshade-shutter-grill-acsheet"
source: https://www.bctengineer.com/q/semester_7/estimating_and_costing/units-sunshade-shutter-grill-acsheet
site: BCT Engineering
---

# Units: sunshade, shutters, grills, AC sheet

Estimating and Costing · Chapter 1: Introduction

- Asked in: 2081 Baisakh, 2 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/units-sunshade-shutter-grill-acsheet
- Whole chapter: https://www.bctengineer.com/md/semester_7/estimating_and_costing/chapter-1

## Question

Write down the unit of measurement and unit of payment for the following items of works: i) R.C. sunshade with specified width and height ii) Thickness specified shutter of doors and windows iii) Iron grills iv) Asbestos cement sheet in roofs.

## Short answer

R.C. sunshade with specified width and thickness is measured in running metre along its length; shutters in m²; iron grills in m² or kg; AC/CGI roof sheets in m² of covered roof area, overlaps not measured.

## Answer

| Item | Unit of measurement | Unit of payment |
|---|---|---|
| i) R.C. sunshade (chajja) with width and thickness specified | m (running metre), measured along its length; if the width and thickness are not specified, the concrete is measured in m³ (formwork in m², steel in kg) | m (running metre) |
| ii) Shutters of doors and windows, thickness specified | m² of shutter | m² |
| iii) Iron grills | m² of area (or kg by weight) | m² or kg |
| iv) Asbestos cement (AC) / CGI sheet in roofs | m² of the covered roof area, net, with overlaps not measured | m² |

Note: in new work, asbestos-cement sheets have largely been replaced by CGI or colour-coated sheets, but the unit remains m².

## Check yourself

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

1. How is an R.C. sunshade measured?
   A. Only in running metre
   B. m³ of concrete with formwork in m² and steel in kg separately
   C. Only in number
   D. Only in litres
   Answer: B. Concrete, formwork and steel are separate items. (Key point: RC sunshade)

2. AC/CGI roofing sheets are measured in
   A. m³
   B. kg
   C. m² of net covered roof area, overlaps not measured
   D. running metre including overlaps
   Answer: C. Area of roof covered, without overlaps. (Key point: Roof sheet)

3. Shutters are measured in
   A. m
   B. m³
   C. numbers only
   D. m²
   Answer: D. Shutter area with thickness specified. (Key point: Shutter)

## Related in Estimating and Costing

- [Units: iron grills, skirting, formwork, shutters](https://www.bctengineer.com/question.md?key=semester_7%2Festimating_and_costing%3Aunits-grills-skirting-formwork-shutters) — Estimating and Costing, chapter 1
- [Units of measurement and payment, civil and sanitary](https://www.bctengineer.com/question.md?key=semester_7%2Festimating_and_costing%3Aunits-civil-sanitary-works) — Estimating and Costing, chapter 1
- [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
- [Measurement and units: pointing, steel](https://www.bctengineer.com/question.md?key=semester_7%2Festimating_and_costing%3Ameasure-pointing-steel-units) — Estimating and Costing, chapter 1

## Related in other subjects

- [Types of doors based on shutters](https://www.bctengineer.com/question.md?key=semester_6%2Fbuilding_technology%3Adoor-types-by-shutter) — Building Technology, chapter 6, asked 2×