A door is a moving structure used to block off, and allow access to, an entrance to or within an enclosed space, such as a building.
A door is a moving structure used to block off, and allow access to, an entrance to or within an enclosed space, such as a building. Similar exterior structures are called gates. Typically doors have an interior side that faces the inside of a space and an exterior side that faces the outside of that space. While in some cases the interior side of a door may match its exterior side, in other cases there are sharp contrasts between the two sides, such as in the case of the vehicle door. Doors normally consist of a panel that swings on hinges or that slides or spins inside of a space.
Doors are used to screen areas of a building for aesthetics, keeping formal and utility areas separate. Doors also have an aesthetic role in creating an impression of what lies beyond. Doors are often symbolically endowed with ritual purposes, and the guarding or receiving of the keys to a door, or being granted access to a door can have special significance. Similarly, doors and doorways frequently appear in metaphorical or allegorical situations, literature and the arts, often as a portent of change.
Casement doors are side hung with two sashes that can be opened on either side. These doors are also known as French doors and can even be purchased as Villa doors that have a single sash side hung and joined with a bigger portion.
The sliding Door is made up of more than one sash that slide horizontally, to the left or right, on tracks. The doors can be made wider and taller with the addition of sashes.