dër

A door, or dør in Norwegian, is a movable barrier that controls entry and passage between spaces. Typically attached to a door frame by hinges, it can swing on a hinge, slide along a track, fold, or rotate on a pivot. Doors serve privacy, security, weather sealing, and acoustic control, and they are a primary component of architectural circulation.

Interior doors separate rooms and may prioritize light transmission or sound reduction, while exterior doors provide security and climate protection. Common types include hinged doors, sliding closet doors, pocket doors that slide into a wall, French doors with glass panes, and revolving doors in public buildings. Fire doors and security doors meet specific performance requirements for fire resistance, impact resistance, and intrusion protection. Materials range from solid wood and engineered wood to steel, aluminum, fiberglass, or composite panels, often with glass inserts. Finishes vary with aesthetic, durability, and maintenance considerations.

Hardware includes the door slab, frame, hinges, latch or lock, door handle, and a threshold or weatherstrip. Proper sizing, clearances, and weatherstripping ensure reliable operation, energy efficiency, and ease of use. Fire and weather ratings influence installation in buildings and compliance with local codes. Accessibility standards may require lever handles, minimum doorway width, and barrier-free operation.

Maintenance involves checking hinges for squeaks, ensuring alignment, inspecting seals and weatherstripping, and servicing locks. The term dør reflects the widespread role of doors in architecture across languages and cultures, reflecting both function and design in built environments.