Is there a minimum or maximum door size for spray booths?

OSHA does not have a minimum or a maximum door size for spray booths. OSHA spray booth construction requirements are at 1910.107. As long as the booth meets these requirements, the door size is irrelevant. In an archived OSHA Technical Support Document dated November 04, 1976, the agency states “In any discussion of spray booths the physical size of the booth becomes of prime importance since the size of the booth may range from something which will accommodate a product 1 inch in length by 1 inch in width by 1 inch in height to a booth which will accommodate an object 20 feet in width by 25 feet in height and 100 feet in length. Obviously, the requirements of each of these booths would be radically different in relation to personal protective equipment and ventilation.” The focus is on what the function of the booth is, rather than door size.

Also, clearances may be addressed in a local building and fire code.