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Q. |
## The maximum tensile and compressive bending stress in extreme fibres of rolled I-sections and channels on the effective section, is |

A. | 1500 kg/cm2 |

B. | 1420 kg/cm2 |

C. | 1650 kg/cm2 |

D. | 2285 kg/cm2 |

Answer» C. 1650 kg/cm2 |

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- The maximum tensile and compressive bending stress in extreme fibres of rolled I-sections and channels on the effective section, is
- The equivalent axial tensile load Pe, which produces an average axial tensile stress in the section equivalent to the combined stress due to axial tension P and bending M, at the extreme fibre of the section, is given by (where Z is the section modulus of the section).
- The permissible stress in bending for rolled steel I-beams and channels, is
- If fbt and fc are the co-existent bending tensile stress and shear stress in a member, the equivalent stress fc is
- Bending compressive and tensile stresses respectively are calculated based on
- The allowable stress in axial tension for rolled I-sections and channels, is taken as
- In a built up beam actual bending compressive stress fbc is given by (when y1 is the distance of the edge of the beam from the neutral axis).
- In a built up beam actual bending compressive stress fbc is given by (when y1 is the distance of the edge of the beam from the neutral axis).
- The moment of the couple set up in a section of a beam by the longitudinal compressive and tensile force, is known as
- The moment of the couple set up in a section of a beam by the longitudinal compressive and tensile force, is known as