. Handbook of construction plant, its cost and efficiency. Fig. 76. TRIPOD DERRICK OP PIPE AND DROP FORGED FITTINGS Size ofNo. pipe legs Weight Safe capacity Price 1 1 x 7 38 lbs. 1000 lbs $ 2 1 x 8% 45 lbs. 1000 lbs 3 l^xl0 88 lbs. 2000 lbs 4 1 %xl2 100 lbs. 2000 lbs 5 2 xl2 145 lbs. 3000 lbs 6 2 xl4 165 lbs. 3000 lbs Sulky derrick about 15 high. One man, one ton, with brake,blocks and 50 of 1/£ steel wire rope or 100 of 1 manila , 3,500 lbs. Price, $ See Fig. 76. 190 HANDBOOK OP CONSTRUCTION PLANT LIGHT DERRICKS WITH WINCHES OPERATED BY HANDPO
. Handbook of construction plant, its cost and efficiency. Fig. 76. TRIPOD DERRICK OP PIPE AND DROP FORGED FITTINGS Size ofNo. pipe legs Weight Safe capacity Price 1 1 x 7 38 lbs. 1000 lbs $ 2 1 x 8% 45 lbs. 1000 lbs 3 l^xl0 88 lbs. 2000 lbs 4 1 %xl2 100 lbs. 2000 lbs 5 2 xl2 145 lbs. 3000 lbs 6 2 xl4 165 lbs. 3000 lbs Sulky derrick about 15 high. One man, one ton, with brake,blocks and 50 of 1/£ steel wire rope or 100 of 1 manila , 3,500 lbs. Price, $ See Fig. 76. 190 HANDBOOK OP CONSTRUCTION PLANT LIGHT DERRICKS WITH WINCHES OPERATED BY HANDPOWER Fig. 78. These can also be operated by an engine and can beset upon a small car. Fitted with manilla rope for light work. Sheaves arrangedfor three lines in the boom tackle and two lines in the Fig. 77. Plant for Loading Earth. 1 Derrick, 1500 lbs. capacity with 18 mast and 18 $ of % pure manilla rope, estimated for boom line, at 4c ft 150 of % pure manilla rope, estimated for fall line, at 4c ft. .. 300 of % pure manilla rope, estimated for 4 guy lines at 5c ft 3 7 single wood blocks for hoist and boom line, at 75c 2,25 1 boom winch, used for operating the boom Total $ Same outfit with 16 mast and 16 boom $ Same outfit with 14 mast and 14 boom Same outfit with 12 mast and 12 boom 1 light car, 4x6, with flat wheels, complete 1 No. 1 light car, 4x6, with flanged wheels, All derrick irons for derrick (no rope, blocks, boom winch or timbers, but with drawings for mast and boom) DERRICKS 191 FITTED WITH STEEL HOISTING CABLES FOR HEAVYWORK Sheaves arranged for three lines in the boom tackle and threelines in the hoisting tackle.
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Photo credit: © The Reading Room / Alamy / Afripics
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbuilding, bookyear191
