Architectural engineering. With special reference to high building construction, including many examples of Chicago office buildings (1895)
Freitag, Joseph Kendall · New York, J. Wiley & sons; [etc., etc.] · leaf 200
of steel rails, 4f high and 4f base, 75 lbs.per yard weight, with an allowable moment of 12,100 ft.-lbs.per rail. In the upper course, as many beams are used as thespace under the column casting will allow. The project-ing arms must therefore be determined. The total lengthof the I beams so found… … Fig. hi.—Beam and Rail Footing from The Fair Building. lengths of the upper ones, and by the dimensions of the clayarea; hence the question is, how many pieces are required ?The formulae used may be derived as follows:Let y — projecting arm in any course ;a = width of supporting area; 182…
Building, Iron and steel
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