HIINGE-DOOR is a door body that connects the door frame and the door leaf through a hinge (hinge) to achieve inward or outward opening. As the most common door type, its core advantage lies in its simple structure and strong applicability.

1. Main types
By opening direction:
Inward-opening door: The door leaf opens to the interior, suitable for protecting privacy (such as bedroom door).
Outward-opening door: The door leaf opens to the outside, saving indoor space (such as entrance door).
Classification by material:
Wooden door: solid wood, composite board (suitable for home and office).
Metal door: steel, aluminum alloy (fireproof door, anti-theft door).
Glass door: tempered glass + metal frame (shop, display cabinet).
Mixed materials: such as wooden frame + glass, metal + decorative panel, etc.
2. Core advantages
Strong versatility: suitable for most building structures and scenes.
Simple installation: The hinge fixing method is mature and supports DIY installation.
Cost controllable: from economical to high-end customization, the price span is flexible.
3. Key components
Hinges:
Ordinary hinges (home use), hydraulic hinges (automatic closing), hidden hinges (minimalist design).
Door frame and door leaf:
The door frame material must match the wall (wood/metal/stone).
The door leaf can be filled with sound insulation cotton, fireproof materials and other enhanced functions.
Locks and accessories:
Mechanical locks, electronic locks, door stops, handles, etc.

4. Application scenarios
Home space:
Entrance door, bedroom door, bathroom door (wood or glass + privacy treatment).
Commercial space:
Office partition door, shop entrance door (glass or metal material).
Industrial scene:
Factory equipment room door, fire escape door (steel + fireproof core material).
5. Precautions
Hinge load-bearing: Select the hinge specifications according to the weight of the door leaf (such as heavy doors require special hinges).
Installation accuracy: Make sure the door frame is vertical and there is a gap between the door leaf and the ground (to avoid friction).
Maintenance requirements: Lubricate the hinge regularly to prevent rust or abnormal noise.