Ladder

Compatibility torsion — the ladder

One essay so far against this idea. A ladder is the distinct arguments that stand against one idea, and this one has room to grow.
  1. 20%40%60%80%100%020406080100120torsional stiffness left, as a fraction of the uncracked valuetorque in the spandrel (kNm)compatibilityit goes awayequilibriumit does not100 kNm40 kNmcracking sheds a factor of 2.47 of torque, and the floor beam pays 18% more sagging moment

    The torsion that goes away if you let it

    A spandrel beam attracts a torque in proportion to its own torsional stiffness. Crack it and the stiffness falls by a factor of four, the torque falls with it, and nothing has failed — because the floor beam it was competing with picks up exactly what was shed. A canopy hung off the same spandrel is a different animal entirely.

    rung 1 · internal-forces

All ladders