The size of a door should be such that it would allow the movement of largest object or tallest person likely to use the door. As a rule, the height of a door should not be less than 1.8 m to 2 m. The width of the door should be such that two persons can pass through it walking shoulder to shoulder.
Standard sizes of exterior doors are 1.0 m wide, increasing in 2" increments. Most residential interior doors are 0.9 m wide and 2.0 m high except when designed to allow wheelchair access, then 1.0 m wide. Residential doors are often, as are many small stores, offices, and other light commercial buildings. Small spaces such as closets, dressing rooms, half-baths, storage rooms, cellars, etc. often are accessed through doors smaller than passage doors in one or both dimensions but similar in design. Garage doors are generally 2.25 wide for a small-cars. Larger commercial, public buildings and grand homes often use doors of greater height. Older buildings often have smaller doors.
Residential buildings
External door : 1.0 m x 2.0 m to 1.1 m x 2.0 m Internal door : 0.9 m x 2.0 m to 1 m x 2.0 m Bath & W.C door : 0.7m x 2.0 m to 0.8m x 2.0 m Garage doors : 2.25 m x 2.25 m to 2.25 m x 2.40 m
Public buildings
Schools :1.2 m x 2.0 m Hospitals :1.2 m x 2.1 m Libraries :1.2 m x 2.25 m.
Participants