General Electric Review Volume 16

General Electric Review Volume 16

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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. 1913 edition. Excerpt: ... variation in the relation between these dif the occupants in the event of fire. As the stairways would ordinarily help out the elevators very materially at such a time, particularly as regards the lower floors, a building could ordinarily be cleared of its occupants in a considerably less period of time in an emergency than that required to transport all of the occupants of the building one way under normal conditions. In Fig. 4 a chart is shown by means of which the necessary number of square feet of elevator car area may be obtained for a proposed building, having a given number of square feet of rentable area, after assuming a maximum period of time for transporting all Fig. 4. Chart for Determining the Number and Size of Elevators Required for Office Buildings of Given Total Occupied Floor Area For convenience, we will assume a building requiring local elevators only, although the chart is equally applicable to a building requiring both local and express service, if each class of service is considered separately in relation to the portion of the building which it is to serve. We will assume that our building is to have 15 stories above the ground floor and is to have a total occupied area of 100,000 square feet. Referring to Fig. 2, we can safely assume an average round trip time throughout the day of about 2 4 minutes for a building of this type. It will also be safe to assume that this round trip time will not be exceeded even during the morning rush, for while the If we erect a perpendicular at 2X4 minutes on the horizontal scale of "round trip time in minutes," until it intersects the curve marked "30 minutes," and then draw a horizontal line to the left until it intersects a perpendicular erected at 100,000...show more

Product details

  • Paperback
  • 189 x 246 x 28mm | 953g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 123693055X
  • 9781236930552