Fire Safety Science Digital Archive

It is often necessary to protect openings in fire resisting walls of buildings by means of doors and shutters exceeding appreciably in size specimens which have been subjected to the standard fire test. An examination has been made of the factors affecting the ability of various types of door and shutter to act as barriers to the spread of fire, and how far test data may be safely extended. Recommendations for maximum heights and widths of the different types, except timber doors, have been made, and for the spacing of combustible materials of construction and contents to avoid risk of ignition by heat radiated from doors and shutters of the maximum dimensions.