Engineering Office Systems And Methods Together With Schedules And Instructions For The Collection Of Preliminary Data For Engineering Projects Samp

Author : John Percival Davies
Publisher : Rarebooksclub.com
ISBN 13 : 9781230169019
Total Pages : 208 pages
Book Rating : 4.1/5 (69 download)

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Download or read book Engineering Office Systems and Methods; Together with Schedules and Instructions for the Collection of Preliminary Data for Engineering Projects; Samp written by John Percival Davies and published by Rarebooksclub.com. This book was released on 2013-09 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 edition. Excerpt: ...and over-run in weight of castings, it is necessary to add a percentage to the net calculated weight varying from 5 percent in the case of large castings to 10 percent in the case of small pieces with numerous fillets. Table VIII.--Unit Weights of Substances most commonly used in Machinery Estimating Detail Sheets In Fig. 83 is given an example of a convenient form of sheet for recording the details of an estimate. Its use practically compels a certain amount of system in taking off the quantities; so that all plates, all loam castings, etc., will be listed together and cost computed at the proper rate. By preparing the material-estimate in this methodical manner, and by checking-off each piece as listed by a red mark on the print, no serious omissions of items should take place. The same form may be used for making the estimate of direct labor required; and the totals may then be transferred to the Estimate Summary Sheet (Fig. 81) for addition of Indirect Costs, etc. SEC. III. STRUCTURAL STEEL ESTIMATING A Structural Steel Estimating Method General The method of "taking off" structural steel material outlined below is one which, with slight modifications, is quite generally used in estimating offices throughout the country. It is submitted, more particularly, as an aid to engineers in other than structural steel offices who may have occasion to make or to check estimates on work of this character. It has been the author's experience that engineers who have never done structural steel estimating quite frequently obtain results Fig. 83.--Heading of detail sheets for mechanical estimating. Size, 8 in. X 13 1/4 in. in this work that are 25 percent or more in error (usually low); and that a comparison of their figures with those of...