---
title: "Functions of door and window; battened door elevation"
subject: "Building Technology"
chapter: 6
key: "semester_6/building_technology:door-window-functions-battened"
source: https://www.bctengineer.com/q/semester_6/building_technology/door-window-functions-battened
site: BCT Engineering
---

# Functions of door and window; battened door elevation

Building Technology · Chapter 6: Doors and windows

- Asked in: 2070 Chaitra (old course), 2+3+3 marks
- Video: [Types of Doors (Part-1) | Door | Building Construction](https://www.youtube.com/watch?v=-T4vVao3JVQ) — SGK Online Education
- Answer checked by Claude Opus 5.5 (high effort) on 2026-10-14
- Page: https://www.bctengineer.com/q/semester_6/building_technology/door-window-functions-battened
- Whole chapter: https://www.bctengineer.com/md/semester_6/building_technology/chapter-6

## Question

What are the functions of door and window? Draw elevation of battened door and glazed window having wooden members.

## Short answer

Doors give entry/exit, privacy, security, control light/air/sound, protect against weather, allow furniture movement and fire escape. Windows admit daylight, fresh air, view, remove stale air, enhance appearance. Battened door elevation shows vertical tongued-and-grooved battens held by horizontal ledges on back within a frame. Glazed window elevation shows wooden frame with two hinged sashes each having stiles, rails, glazing bars holding glass panes with putty.

## Answer

#### Functions of doors and windows
**Door:**
- Gives entry and exit and connects rooms.
- Provides privacy and security.
- Controls light, air and sound, and protects against weather.
- Allows movement of furniture and goods, and escape in a fire.

**Window:**
- Admits daylight and fresh air (natural ventilation).
- Gives a view of the outside.
- Helps remove hot, stale air.
- Adds to the architectural appearance.

#### Elevation of a battened door
A battened door has vertical boards (battens, 100-150 mm wide, 20-30 mm thick), tongued and grooved, and held together by two or three horizontal **ledges** nailed or screwed on the back, with the frame around it.

```text
   +----------------------+  <- head
   ||||||||||||||||||||||||
   ||||||||||||||||||||||||
   |======================|  <- top ledge (on back)
   ||||||||||||||||||||||||
   ||||||||||||||||||||||||
   |======================|  <- middle ledge
   ||||||||||||||||||||||||
   |======================|  <- bottom ledge
   +----------------------+
   <- battens (vertical) ->
```

#### Elevation of a glazed window (wooden)
A wooden frame with two glazed sashes hinged to the posts. Each sash has stiles, a top rail, a bottom rail and glazing bars holding the glass panes with putty or beading.

```text
   +-------------------------+  <- head
   |+----------+ +----------+|
   ||  glass   | |  glass   ||
   ||----------| |----------||  <- glazing bar
   ||  glass   | |  glass   ||
   |+----------+ +----------+|
   +-------------------------+  <- sill (sloped)
    <- sash ->     <- sash ->
```

## Check yourself

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

1. How are battens of a battened door fixed together?
   A. By vertical stiles and panels
   B. By a hollow core
   C. By horizontal ledges nailed or screwed on the back
   D. By hinges between battens
   Answer: C. Vertical tongued-and-grooved battens are held by 2-3 ledges. (Key point: Ledges)

2. What is the width of a batten?
   A. 10-20 mm
   B. 300-400 mm
   C. 500 mm
   D. 100-150 mm
   Answer: D. Battens are 100-150 mm wide and 20-30 mm thick. (Key point: Batten width)

3. What do glazing bars do in a glazed window?
   A. Hold the glass panes in the sash with putty or beading
   B. Fix the frame to the wall
   C. Operate the sash
   D. Ventilate the room
   Answer: A. Glazing bars divide the sash and hold the panes. (Key point: Glazing bars)

4. Which is a function of a window, not necessarily of a door?
   A. Provide security from entry
   B. Admit daylight and natural ventilation
   C. Allow movement of furniture
   D. Allow escape in fire
   Answer: B. Daylight and ventilation are key window functions. (Key point: Window function)

## Related in Building Technology

- [Functions of openings; door and window types](https://www.bctengineer.com/question.md?key=semester_6%2Fbuilding_technology%3Aopenings-functions-working) — Building Technology, chapter 6
- [Elements of battened door shutter](https://www.bctengineer.com/question.md?key=semester_6%2Fbuilding_technology%3Abattened-door-elements) — Building Technology, chapter 6, asked 2×
- [Fixing of wooden door frames](https://www.bctengineer.com/question.md?key=semester_6%2Fbuilding_technology%3Adoor-frame-fixing) — Building Technology, chapter 6
- [Door/window parts; casement, awning, hopper](https://www.bctengineer.com/question.md?key=semester_6%2Fbuilding_technology%3Adoor-window-parts-casement) — Building Technology, chapter 6
- [Door/window components and door types](https://www.bctengineer.com/question.md?key=semester_6%2Fbuilding_technology%3Adoor-window-components-types) — Building Technology, chapter 6

## Related in other subjects

- [Rate analysis: sal wood door/window frame per m³](https://www.bctengineer.com/question.md?key=semester_7%2Festimating_and_costing%3Arate-sal-wood-frame) — Estimating and Costing, chapter 4, asked 3×
- [Characteristics of different window functions](https://www.bctengineer.com/question.md?key=semester_7%2Fdigital_signal_analysis_and_processing%3Awindow-characteristics) — Digital Signal Analysis and Processing, chapter 5
- [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
- [Ball tossed upward from window; dependent motion](https://www.bctengineer.com/question.md?key=semester_1%2Fapplied_mechanics%3Aball-tossed-vertical-window-dependent-motion) — Applied Mechanics, chapter 8