Modern Building Superintendence And the Writing of Specifications
The book Modern Building Superintendence And the Writing of Specifications was written by author David B Emerson Here you can read free online of Modern Building Superintendence And the Writing of Specifications book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Modern Building Superintendence And the Writing of Specifications a good or bad book?
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The cast-iron brackets for supporting the guides for cars and counter- weights were put in place as soon as the steel frame was erected, and the guides were then installed. The main guides were planed steel tees, 5 by 3J^ by y% inches, reinforced with 7-inch channels, bolted to the tees every 6 feet by means of two iHrinch tap bolts. The ends of the tees were tongued and grooved to form matched joints. The counterweight guides were 33^ by 2 % by /^-inch tees. The passenger-elevators had steel p...ans at the foot of the shaft, giving a clearance of eight feet at the bottom, with oil cushion buffers, one under the car and one under the counterweight, which were arranged to bring either the car or the counterweight ELECTRIC WIRING AND ELEVATORS 113 to a gradual positive stop through the dis- placement of the oil in the buffers. The car slings, which are the frames holding the cars, were made up of structural steel chan- nels, reinforced with steel gusset plates. The platform sat in the slings and consisted of angle-iron frames, with wood filler pieces one and three-quaters inches thick, and a seven-eighths-inch maple underfloor; the under sides of platforms were covered with No.
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