Handbook of construction plant, its cost and efficiency (1914)
Dana, Richard Turner, 1876-1928 · Chicago, The M. C. Clark Publishing Co. · leaf 315
y placed, passing through sheavessecured to the platform and around the niggerhead. The trackis also moved ahead by the same means, the deadman beingdispensed with and line passing around the end of a boom whichis a part of the tower. The line around the niggerhead is op-erated by the fireman. The… … f/ycmtf. Fig. 121. Details of Tower for Field Tower Excavator. EXCAVATORS 311 Scraper Bucket. The distinctive feature of the excavationis the scraper bucket which is shown by Fig-. 122. This bucket hasa capacity of 48 cu. ft. level full, but in ordinary material it willcrown up to 2 cu. yds.…
Contractors' operations · Building
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