S = Mc / I In which: S = Tensile strain in psi; M = Bending second in inch-kilos (wl2/8); I = Minute of inertia—0.04909 (D4−d4) in inches fourth; c = Radius (D/2) of cylinder in inches; w = Body weight per inch of cylinder full of drinking water; l https://aeschylusx431pbn5.iamthewiki.com/user