Fire Tests on Doors
The seventh annual number of the Journal of the British Fire Prevention Committee contains summaries of reports issued at different times on 58 fire tests, carried out on various types of shutters and doors. The particulars given relate to the trade description of the door, the name of the firm who had submitted it, the material and method of construction, its size, and the temperatures withstood for certain periods, with a summary of the observations made during the tests. Out of the 20 tests for the maximum standard of full protection only one door withstood the four hours’ trial, conducted under a fire temperature of 2,060 degrees Fahrenheit. On two separate occasions two shutters together withstood a four hours’ fire test, and were allowed to pass the first standard, although the maximum temperatures of the fires were only 1,730 degrees and 1,820 degrees, respectively. Another shutter withstood a fire for two and one-half hours, when the temperature was only 1,540 degrees, and was passed in the second class of full protection. Seven trials were carried out by the committee for partial protection, but not one door passed successfully; since the summary was prepared, however, a small American door of 21 square feet in area has been classified as affording partial protection. In the remaining 31 tests, which were for temporary protection, only four doors passed—a solid steel door, two armored doors made of deal covered with tin steel sheets, and a composite door made of oak and asbestos. Consul Herman L. Spahrs, Breslau, Germany.