This standard is intended to provide a means for testing fire retardent treatment to be applied to the upper roof timbers of a cleared roof space, the lower timbers of which have been protected by the use of material complying with the test specified in BS/ARP 27.
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BS +ARP 39:1940
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Testing fire retardent timber treatment by exposure to the action of an incendiary bomb
BSI Group , 02/29/1940
Pages: 4
