--- title: "Types of doors based on shutters" subject: "Building Technology" chapter: 6 key: "semester_6/building_technology:door-types-by-shutter" source: https://www.bctengineer.com/q/semester_6/building_technology/door-types-by-shutter site: BCT Engineering --- # Types of doors based on shutters Building Technology · Chapter 6: Doors and windows - Asked in: 2079 Asoj, 4 marks; 2076 Baisakh, 8 marks (asked 2 times) - Video: [How to Identify Different Types of Doors on Construction Site | Panel, Flush, FRP & Metal Door](https://www.youtube.com/watch?v=-fBfh1D-2gU) — The Institute of Construction Managment - Answer checked by Claude Opus 5.5 (high effort) on 2026-10-14 - Page: https://www.bctengineer.com/q/semester_6/building_technology/door-types-by-shutter - Whole chapter: https://www.bctengineer.com/md/semester_6/building_technology/chapter-6 ## Question Explain different types of doors based on shutters with necessary sketches. ## Short answer Door types by shutter: battened, ledged and braced, framed ledged and braced, panelled, glazed, flush, louvered, wire gauze, sheet steel, collapsible rolling shutter. ## Answer A door shutter is the movable leaf that closes the opening. Based on the construction of the shutter, doors are: | Type | Description and use | |---|---| | Battened (ledged) door | Vertical battens joined by horizontal ledges; cheapest; sheds, stores, godowns | | Ledged and braced door | Diagonal braces added to prevent sagging; farm buildings, outhouses | | Framed, ledged and braced door | Battens fixed in a frame of styles and rails, with braces; stronger | | Panelled door | Styles, rails and panels of timber/plywood/glass; most common in houses and offices | | Glazed door | Panels of glass in a framework; for light; shops, offices | | Flush door | Flat on both sides, with plywood over a core (solid or hollow); modern houses | | Louvered door | Slats (louvres) in the shutter; ventilation; bathrooms, stores | | Wire gauze (mosquito) door | Wire mesh in a frame; ventilation and insect protection | | Sheet / steel door | Metal sheet; fire resistant and strong; industrial buildings, godowns | | Collapsible / rolling steel shutter | Steel strips or channels; shops, garages | ```text Battened Ledged & braced Panelled Flush Louvered ||||||||| |=========| +--+---+--+ +-------+ +-------+ ||||||||| | / | | | P | | | | |=======| ||||||||| |====/====| | +---+ | | | |=======| ||||||||| | / | | | P | | | | |=======| ||||||||| |=========| +--+---+--+ +-------+ +-------+ ``` - **Battened door:** boards 100-150 mm wide and 20-40 mm thick, joined by 3 ledges 100-150 mm wide at the top, middle and bottom. - **Ledged and braced door:** braces run diagonally between the ledges, rising from the hinge side towards the lock side. - **Panelled door:** styles 100 x 40 mm, rails 100-200 x 40 mm, panels 15-20 mm thick. - **Flush door:** plywood faces 3-6 mm thick glued on a frame with a solid or hollow core. ## Check yourself The answer's key points as multiple-choice questions, with the correct option and why. 1. Why are diagonal braces added to a ledged door? A. To allow ventilation B. To improve appearance C. To prevent sagging of the shutter D. To make the door fire resistant Answer: C. Braces stop the leaf from sagging, so ledged and braced doors suit out-houses and farm buildings. (Key point: Ledged and braced door) 2. A flush door is best described as A. Vertical battens held by three ledges B. Slats inclined at 45 degrees in the shutter C. Wire mesh in a frame D. Flat on both sides with plywood over a solid or hollow core Answer: D. A flush door has plywood faces over a frame with a solid or hollow core. (Key point: Flush door) 3. Which door suits bathrooms and stores needing ventilation? A. Louvered door B. Glazed door C. Steel sheet door D. Flush door Answer: A. Louvered doors have slats that allow ventilation, suited to bathrooms and stores. (Key point: Matching door to use) ## Related in Building Technology - [Thermal insulation of walls, doors, windows, roofs](https://www.bctengineer.com/question.md?key=semester_6%2Fbuilding_technology%3Athermal-insulation-exposed-walls) — Building Technology, chapter 1, asked 3× - [Elements of panelled and battened doors](https://www.bctengineer.com/question.md?key=semester_6%2Fbuilding_technology%3Apanelled-battened-elements) — Building Technology, chapter 6 - [Why joints are necessary; expansion joint](https://www.bctengineer.com/question.md?key=semester_6%2Fbuilding_technology%3Ajoints-why-expansion) — Building Technology, chapter 10, asked 2× - [Types of doors by working mechanism](https://www.bctengineer.com/question.md?key=semester_6%2Fbuilding_technology%3Adoor-types-working) — Building Technology, chapter 6, asked 2× - [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 - [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 - [Units: sunshade, shutters, grills, AC sheet](https://www.bctengineer.com/question.md?key=semester_7%2Festimating_and_costing%3Aunits-sunshade-shutter-grill-acsheet) — Estimating and Costing, chapter 1 - [Feature-based modelling and sketch-based operations](https://www.bctengineer.com/question.md?key=semester_4%2Fcomputer_aided_design%3Afeature-based-modeling-operations) — Computer Aided Design, chapter 5 - [Appropriate, intermediate and labor-based technology for LDCs](https://www.bctengineer.com/question.md?key=semester_7%2Ftechnology_environment_and_society%3Aappropriate-intermediate-labor-ldc) — Technology, Environment and Society, chapter 1, asked 2×