. Electric railway journal . San Francisco Track—Setting Drop-Hammer Legs pulled by the hoisting winch on a 8-ton derrick car, or it isbroken up by means of a 3100-lb. drop-hammer rigged onthe boom of the derrick. The cost of the two processesamounts to a small fraction of a cent per foot of track. March 15, 1913.] ELECTRIC RAILWAY JOURNAL 463 The concrete paving base on the 2-ft. strip outside therails is next broken by means of the same drop-hammer,which strikes a blow on 30-in. sections of 9-in. girder rail,laid on its flat side on the concrete. This shatters the track as it advances. When
. Electric railway journal . San Francisco Track—Setting Drop-Hammer Legs pulled by the hoisting winch on a 8-ton derrick car, or it isbroken up by means of a 3100-lb. drop-hammer rigged onthe boom of the derrick. The cost of the two processesamounts to a small fraction of a cent per foot of track. March 15, 1913.] ELECTRIC RAILWAY JOURNAL 463 The concrete paving base on the 2-ft. strip outside therails is next broken by means of the same drop-hammer,which strikes a blow on 30-in. sections of 9-in. girder rail,laid on its flat side on the concrete. This shatters the track as it advances. When this work has been completed,the rail, ties, concrete, spikes, old chairs, etc., are lying looseand ready to be loaded on cars to take to the dump. The next process is that of excavating the .French by. San Francisco Track—Dismembered Cable Track Readyfor Excavator concrete and breaks it approximately on a line 2 ft. fromand parallel with the outer rail. The next process is that of tearing up the old track bymeans of this same derrick car. The derrick is on the sametrack that is being pulled, and a hook is attached by meansof a chain to the end of a tie. The track, ties, concrete,etc., are then raised bodily from 3 ft. to 4 ft. This processshatters the concrete in the track, breaking everythingloose. While the track is suspended in this position, a gangof five men with sledges drive the ties from the rails. With-out having its position on the track changed, the derrick isthen attached to the other end of the tie and that side of
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