## Structural theory |

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### Contents

REACTIONS AND STRESSES 140 | 1 |

GRAPHIC STATICS 4172 | 41 |

ROOF TRUSSES 7385 | 73 |

Copyright | |

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### Common terms and phrases

acting angle applied arch assumed axis axle loads bar stresses bending bridge carry-over causes compression computed concentrated load conjugate beam dead load diagonal direct stresses distance downward Draw dummy load elastic weights end moments equation equilibrium polygon Example fixed-end floor beams force polygon force system free body funicular girder given gives hinge horizontal indeterminate influence line intersection joint kip-ft kips lb per ft lb per sq length line of action live load load shown lower chord magnitude method Method of moments movement Note ordinate panel load parallel plane points of contraflexure positive Problem purlins reaction components redundant resultant roof rotation secondary stresses shear shown in Fig simultaneous equations slope deflection solution span statically determinate stiffness stress in bar stringers structure tension top chord triangle truss of Fig uniform load unit load unknown vertical component vertical deflection Warren truss Williot diagram