Show LIGHTED CIGARS DANGEROUS butt or cigarette thrown on wooden floor of steel bridge may cause fire prepared by the united states state department of agriculture dont throw away your cigar or cigarette when crossing a bridge with a wooden floor advises the bureau of public roads of the united states department part ment of agriculture it may start a fire that will detroy de troy the bridge sarny such fires are started most of them are put out with small damage but occasionally a large structure Is destroyed it seems strange that a steel bridge should be destroyed by iare but heat from a burning floor may cause the destruction of the whole bridge by softening the breaking of one weakened member will cause the whole span to drop into the alie river on some large bridges a watch watchman miln Is kept to guard against this ibis danger and in a dry season fires have been known to occur dally daily A committee composed of a depre senta tentative tive of the bureau and depre senta tives of the national board of fire underwriters the lumber and creosote industry and the engineering news record a prominent engineering magazine Is now investigating the subject and conI considering dering the best means of protection |