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Original Version

Rule 48.4

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. |

Strikeout and Underline Version

Rule 48.4

48.4 | The Other Structural Materials Fiber-Reinforced Polymer | |

The For other structural materials, the safety factor specified in Rule 44 shall be applied as follows: | ||

The 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. The Compression: The required strength of overhead line structures and subcomponents made with fiber-reinforced polymer shall be derived in conjunction with the safety factors in Rule 44 and other permitted stresses specified in the applicable standard. This requirement applies to tension and bending, compression and bending, and shear. TheThe ultimate compressive strength of the material The 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 The usedor structure, considering The yieldthe strength of the material, modulus of elasticity, geometry, slenderness ratio and eccentricity of connection. The In no case shall the ultimate compressive stress be greater than the yield strength Note: The strength may be determined per Section 2.6.2 of ASCE 111-2006. the material. The 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. |

Final Version

Rule 48.4

48.4 | Fiber-Reinforced Polymer | |

The required strength of overhead line structures and subcomponents made with fiber-reinforced polymer shall be derived in conjunction with the safety factors in Rule 44 and other permitted stresses specified in the applicable standard. This requirement applies to tension and bending, compression and bending, and shear. The compressive strength of the material shall be determined by suitable formula for the material or structure, considering the strength of the material, modulus of elasticity, geometry, slenderness ratio and eccentricity of connection. |
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Note: | The strength may be determined per Section 2.6.2 of ASCE 111-2006. |