Contractors' and Dealers' Association of California · San Francisco : L. A. Larson · leaf 530
de of flexible BtriLDINO AND ENGINEERING NEWS. tires of machines nmning over thewarning signal. These strips of sheet steel orpickets when electro galvanized willlast a life time, and when painted witha luminou:; paint, can be readily seenat night. The number of accidents at railroadcrossings is… … sheet steel strip;;, are so secured atthe bottom that in the event of adriver disregarding the signal and de-liberately or accidentally runningover the pickets, no harm will he done,because the upright strips or picketswill bend over without injury to them-selves or to the vehicle and resumetheir…
Architecture · Building · Construction industry · Engineering
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