File:Field system (1908) (14580092249).jpg

Identifier: fieldsystem00gilb (find matches)
Title: Field system
Year: 1908 (1900s)
Authors: Gilbreth, Frank Bunker, 1868-1924
Subjects: Contractors operations. (from old catalog)
Publisher: New York and Chicago., The M. c. Clark publishing co.
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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or ten-ders to stand upon, to cover the elevator well atthe top. 365 Build an outside protection over men at thebottom of the chimney. Make this strong enough tostop a brick falling from the top of the chimney. 366 Build a peach basket form on the top of thechimney, so that the head can be built perfect inshape. 367 Get permission to build a collar under the headof the chimney^ to support the peach basket. 368 Find out from the makers of the iron cap ifsome representative of our firm has seen the completecap set up and all bolted together. This may costsome money, but it is in the interests of good work. 369 Each piece or section of the iron cap must beself supporting on the wall. If it is not shown thuson the plans, notify the office immediately. 370 Have the cap drilled and tapped with standardthread before leaving the shop, to support the attach-ing device for the lightning rod. Ill TALLEST CHIMNEYN GREATER BOSTON Height 255 Feet Note peach Basket Last Hundred Feet Built In 14 Days
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112 CONCRETE 371 Concrete should be mixed as wet as possible with-out having any free water to wash the cement off. thestone. Any man who advocates using concrete dryerthan this has not kept up with the advances of engi-neering knowledge in the last few years. If, how-ever, your Inspector requires dry concrete, give himwhat he wants. 372 Ram all concrete, its strength is increased nearly50 per cent by thorough ramming. Do not attemptto ram concrete under water; the cement will bewashed off the sand and stone. 373 In hot weather care must be taken to preventconcrete from drying too rapidly. Protect it fromthe sun, and, after the first 24 hours, keep it as wetas possible. Portland cement requires a large amountof water to form its crystals. You cant keep it toowet, the more water the better. 374 Sand for concrete must be coarse, clean and sharp.If such sand is not obtainable the job must be stopped.Fine sand must not be used for concrete even if itgives good results, unless there is coa

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