Handbook of construction plant, its cost and efficiency (1914)
Dana, Richard Turner, 1876-1928 · Chicago, The M. C. Clark Publishing Co. · leaf 200
clamps and bolts for % rope at 24c 2.88 1 12 snatch block bronze bushed 11.55 Total $170.86 A car provided with an A frame, a hoisting engine and lightjack arms, capable of lifting 5-ton boulders, etc., costs from$1,500 to $2,000 new. See Fig. 79. DERRICKS 195 IRONS FOR POWER-OPERATED STIFF-LEG… … Iron Work Complete for Power Stiff-Leg Derrick—AsRegularly Furnished. 1 Mast Top with straps and gudgeon pin.1 Mast Bottom complete with step, double sheaves and strap for boom.1 Flat Bolted Boom Band with 2 links. D. 1 Single Boom Sheave with boxes, for center of mast. E. 1 Double Sheave Mast…
Contractors' operations · Building
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