Adams, Henry · London, New York [etc.] Longmans, Green, and Co. · leaf 69
practical case of considerable importance it isworth while to go into the question rather fully. Suppose the staircaseto be 5 ft. wide, and it is desired to find the margin of safety allowedwhen each step is caiTying three persons of 12 stone each, and the tensilestrength of the material is 1000… … Pig /80 STRENGTH OF STONE STEPS 55 gravity of section, through which the neutral axis is assumed to pasDivide up the section as in Fig. 182, then 4 X 10 X 2 + 2 X 4 X 6 + 8 X 4 X ^ X 5^ _ 80 + 48 + 85^ 4xl0 4-2x4 + 8x4xi ~ 40 + 8 + 16 213^ oi • 3 = 3f ins. 64 from upper aorface. Eankines rules to…
Building · Structural analysis (Engineering)
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