Topographic Maps and Sketch Mapping

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John Wiley & Sons, Incorporated, 1901 - Cartography - 175 pages
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Page 20 - If 5i inches to one another, 655 will cover a square. If 6 inches to one another, 600 will cover a square. This is for common gable roofs. In hip roofs, where the shingles are cut more or less to fit the roof, add 6 per cent to above figures. A carpenter will carry up and lay on the roof from 1,500 to 2,000 shingles per day, or 2 to...
Page 5 - Roughly speaking, the cost of one-story buildings complete is, for sheds and storage houses, 40 to 60 cents per square foot of ground; and for such buildings as machine shops, foundries and electric light plants, that are provided with traveling cranes, the cost Is from CO to 90 cents per square foot of ground covered.
Page v - ... flat top, low, or high pitched top chord, bowstring, arched or any other shape or slope desired can be framed in steel. Definite types of trusses have maximum suitability for certain loading conditions, slopes, shapes, or spacing, and these factors must be considered in making a choice. In practically all cases the use to which the building is to be put also influences the choice of the type of truss. Typical roof framing designs are shown in Figure 10-7. b. Steel trusses longer than about 50...
Page vi - X r^ ^ x X x xX x* x• x" I-*• x I" X• x '" x• ^ ^ x ^ 8 1 r^ < V E X• 1 x-' ifl X
Page 3 - When the distance between rafters is more than about 15 ft. a line of f-in. rods should be run from the ridge through the purlins to prevent them from sagging in the plane of the rafters.
Page 16 - Roofing. with different sizes of angle purlins and also the number of nails to the pound in each instance : Purlin angle 2x2 ins.
Page v - City requires that floors shall be proportioned to carry the following minimum loads per square foot : Office buildings, 100 Ibs.
Page 5 - Roughly speaking, the cost of one-story iron buildings, complete, is, for sheds and storage houses, 40 to 60 cts.
Page xii - A truss whose bottom chord has a rise of two or three feet, however, presents a better appearance.

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