Commercial engineering for central stations; a compilation of papers dealing with subjects of particular interest to those engaged in central station commercial engineering work (1912)
Williams, Arthur, 1868-, Tweedy, Edmund Francis, 1876- joint author · New York [etc.] McGraw-Hill Book Company · leaf 120
cupants one way withina period of 1/2 hour. If we now follow a perpendicular linethrough the point 2.5 on the scale of round trip time until itmeets the curve marked 30 minutes, and from the point ofintersection draw a horizontal line to the left until it meets a ELEVATORS IN OFFICE BUILDINGS 101… … Fig. 22.—Showing a chart for determining the number of elevators requiredto serve an office building of known occupied floor area. provided to meet the conditions that have been assumed. Wefollow a diagonal line drawn midway between the lines 140 and160 until it meets the corresponding curve line;…
Electrical engineering · Refrigeration and refrigerating machinery · Electric power-plants
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