General Order 95
Section IV
Strength Requirements for All Classes of Lines
48.4 Other Structural Materials
For other structural materials, the safety factor specified in
Rule 44
shall be applied as follows:
Tension: The yield strength of the material used shall be
divided by the safety factor specified in Rule
44
to determine the maximum allowable working stress.
Compression: The ultimate compressive strength of the
material used shall be divided by the safety factor specified in
Rule 44
to obtain the allowable working stress. The ultimate compressive strength
shall be determined by suitable formula for the material used, considering
yield strength of the material, modulus of elasticity, slenderness ratio and
eccentricity of connection. In no case shall the ultimate compressive stress
be greater than the yield strength of the material.
Shear: The ultimate shear strength of the material used shall be divided
by the safety factor specified in Rule 44
to determine the maximum allowable working stress.