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- 2078 Chaitra · 4 marks
- 2078 Baisakh · 2 marks
Types of doors by working mechanism
Short answer
Doors are classified by working mechanism: hinged doors swing on hinges, sliding doors move on rails, revolving doors rotate around a central pivot, and rolling shutters coil upward. Other types include double-acting, accordion, overhead, collapsible, and pivoted doors.
Explain the various types of door based on working mechanism (nature of working operations).
Doors are classified by the way they work (open or move):
| Type | Working |
|---|---|
| Hinged (swinging) door | Leaf opens on hinges about a vertical edge; single or double leaf; most common |
| Double-acting (swing) door | Hung on double-action spring hinges so it opens both ways; hospitals, restaurants |
| Sliding door | Leaf slides on rails parallel to the wall; saves swing space |
| Sliding-folding (accordion) door | Leaves fold like an accordion; partitions in halls |
| Revolving door | Three or four leaves rotate about a central pivot; hotels, banks, air-conditioned buildings |
| Rolling shutter | Steel strips roll up on a drum above the opening; shops, garages |
| Overhead / up-and-over door | Leaf swings up to lie horizontally under the ceiling; garages |
| Collapsible door | Steel channels pivoted together so the leaf folds; lifts, shops |
| Pivoted (tilting) door | Leaf turns about a pivot at the middle; rare |
Hinged Sliding Revolving Rolling shutter
+---+--+ +--+--+ +---o---+ ======= (drum)
| / | | |>>| | | | |||||||
| / | +--+--+ |---+---| |||||||
+---+--+ rails +---o---+ |||||||
✓ Answer checked by Claude Opus 5.5 (high effort)
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