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Original Version
Rule 48.5

48.5 Conductors, Span Wires, Guys and Messengers
Values used for ultimate strengths of wires and cable shall not exceed those given in Appendix B . The ultimate strengths given in Tables 17 , 18 , 19 , 20 , 21 , 23 , & 24 of Appendix B , except for medium–hard drawn copper, are based on the minimum ultimate strengths given in the standard specifications of the American Society for Testing Material. The ultimate strengths given in Appendix B for medium–hard drawn copper are based on the standard specifications of the ASTM and provide an allowance above the minimum values of one–quarter of the range between minimum and maximum values. For use of types of wires and cables of other material not included in Appendix B , values for ultimate strengths similarly derived from specifications of the ASTM shall be used except that, if such specifications are nonexistent, maker’s specifications may be used provided that tests have been made which shall justify the maker’s rating for ultimate strength.

Strikeout and Underline Version
Rule 48.5

48.5 Conductors, Span Wires, Guys and Messengers
Values used for ultimate strengths of wires and cable shall not exceed those given in Appendix B . The ultimate strengths given in Tables 17 , 18 , 19 , 20 , 21 , 23 , 24 of Appendix B , except for medium–hard drawn copper, are based on the minimum ultimate strengths given in the standard specifications of the American Society for Testing Material. The ultimate strengths given in Appendix B for medium–hard drawn copper are based on the standard specifications of the ASTM and provide an allowance above the minimum values of one–quarter of the range between minimum and maximum values. For use of types of wires and cables of other material not included in Appendix B , values for ultimate strengths similarly derived from specifications of the ASTM shall be used except that, if such specifications are nonexistent, maker’s specifications may be used provided that tests have been made which shall justify the maker’s rating for ultimate strength.
48.4 Other StructuralEngineered Materials

ForThe required strength of overhead line structures and subcomponents made with other structuralengineered materials, shall be derived in conjunction with the safety factor specifiedfactors in Rule 44 shall be applied as follows: . This requirement applies to tension, compression, and shear.

Tension: The If the material has a published yield strength of the material used value, that value shall be divided by the safety factor specified in Rule 44 to determine the maximum allowable working stressused in lieu of the tensile strength value.

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 The compressive strength shall be determined by suitable formula for the material used and member geometry, considering yield and /or tensile 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.

Note: The strength may be determined per Section 2.6.2 of ASCE 111-2006.

Final Version
Rule 48.5

48.5 Other Engineered Materials

The required strength of overhead line structures and subcomponents made with other engineered materials shall be derived in conjunction with the safety factors in Rule 44. This requirement applies to tension, compression, and shear.

Tension: If the material has a published yield strength value, that value shall be used in lieu of the tensile strength value.

Compression: The compressive strength shall be determined by suitable formula for the material used and member geometry, considering yield and /or tensile strength of the material, modulus of elasticity, slenderness ratio and eccentricity of connection. In no case shall the compressive stress be greater than the yield strength of the material.
Note: The strength may be determined per Section 2.6.2 of ASCE 111-2006.