Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 141
and -^ = 68,400 - 228 -, A r P, A, Z, and r having the same meanings as in Art. 83. 113 104 STRENGTH OF MATERIALS The point B corresponds very nearly to the ratio I -r- 7- = 90.Hence, for cohinms for wliicli the ratio I -^ r is less than 90, theiirst fornuila applies; and for columns for which the… … The ratio I ^r- r for steel columns of practice rarely exceeds 150,and is usually less than 100. Fig. 53 is a combination of Figs. 49, 50, 51 and 52, andrepresents graphically a comparison of the Rankine, straight-line,Euler, parabola-Euler, and broken straight-line formulas for flat-ended…
Architecture · Building
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