. Building and repairing railways ... : Forming one of the series of the volumes comprised in the Revised and enlarged edition of The science of railways, . Fig. 349. 35-TON STEAM WRECKING CRANE. Unusual stability is obtained by the powerful steel jack-arms which arehinged to base of A-frame. These jack-arms extend to a lateral base of 19and are arranged to fold up when not in use. The car is also provided withtwo additional jacks and four rail clamps. Ample stability is obtained forall ordinary loads by means of jack-screws and rail clamps. It is onlynecessary to let down the jack-arms when h
. Building and repairing railways ... : Forming one of the series of the volumes comprised in the Revised and enlarged edition of The science of railways, . Fig. 349. 35-TON STEAM WRECKING CRANE. Unusual stability is obtained by the powerful steel jack-arms which arehinged to base of A-frame. These jack-arms extend to a lateral base of 19and are arranged to fold up when not in use. The car is also provided withtwo additional jacks and four rail clamps. Ample stability is obtained forall ordinary loads by means of jack-screws and rail clamps. It is onlynecessary to let down the jack-arms when heavy loads are to be lifted andswung to the side. For the lifting of the maximum load in extreme sidepositions, it is necessary to still further anchor the machine by means of sideguys to the top of A-frame, and ring bolts are provided in the head for Fig. 350. 15-TON DOUBLE MAST HAND WRECKING CRANE. 508 BUILDING AND REPAIRING RAILWAYS.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1906
