SECTIONAL GARAGE DOOR

Garage doors are closed garage products used to provide automobile passage. . Small doors can be made in a single section, while large doors used as commercial or industrial garages are usually made in several parts. To save space, garage doors should be sliding or swinging, folding upwards instead of the usual ones. The operating mechanism is spring-loaded or spring-balanced to offset the weight of the door and reduce the effort required to open and close. Doors are made of wood, metal or fiberglass, and may be insulated to prevent heat loss.
Industrial type doors are used in large doors.