xii NOTATION 



Z, Length, distance, 6, 47, 49, 82. 



m, Poisson's constant, 9. 



J Abstract number, 89, 95, 162. 



\Ratio, 218. 



P,Pi,P',Px,etc., Unit normal stress, 5, 23, 25. 

 p e , Equivalent normal stress, 35. 



OS <fi </' <Z* etc -i U nit shear, 5, 23, 25. 



f Radius, 46, 56, 92. 



\Ratio, 153, 218. 



s, Unit deformation, 6. 



t, t x , t a , etc. , Radius of gyration, 46, 49. 



J Curvilinear coordinate, 108. 



t Fraction, 218. 



u t , Ultimate tensile strength, 112, l;i. 



w c , Ultimate compressive strength, 140, 141. 



u, Fraction, 218. 



( Unit load, 61. 



t Weight per cubic foot, 163. 

 x, ?/, z, Variables. 



x, y, z, Coordinates of center of gravity, 42. 



a, Angle, 26, 46, 163. 



/S, Angle, 6<J. 71. !<;:;. 



5, e, Empirical constants, 88. 



r, Angle, ir,;;. 



77, Correction coefficient, 66. 



( Angle of twist, 92. 



\Angle, 164. 



K , Ratio between tensile and shearing strength, 67. 



X, Arbitrary integer, 26, 82. 



M, Constant, 96. 



v, Empirical constant, 11, 89. 



TT, Ratio of circumference to diameter. 



P, Radius of curvature, 66, 108. 



<r, Empirical constant, 11, 89. 



S, Symbol of summation, 26. 



0, Angle of shear, 33, 92. 



w, Angle of repose, 159. 



