Structural Engineering & Statics
where the load goes
Ladder

Asymmetric section — 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. the same, laid flatZ top 7.5 × 10³Z bottom 7.5 × 10³the same both wayssquareZ top 27.4 × 10³Z bottom 27.4 × 10³the same both waystall rectangleZ top 100.0 × 10³Z bottom 100.0 × 10³the same both waysI-sectionZ top 242.9 × 10³Z bottom 242.9 × 10³the same both waysthe two solid lines are the extreme fibresthe bar is the smaller section modulus, to scale

    Two strengths, depending which way up

    A symmetric section has one section modulus. A tee has two, differing by a factor of three, so the same member has two bending strengths and which applies is decided by the sign of the moment. Turn it over and it is a different beam.

    rung 1 · sections

All ladders