Web — where it appears
Named by 2 essays across one field — each of them below, with the objects they name alongside it.
The section that changes along the span
A prismatic beam is checked where the moment is largest, and everyone knows where that is. A tapered one is not, because the capacity is moving too — and for a cantilever with a load at its tip the governing station is exactly where the depth has doubled, with no length, no load and no material in the answer.
Both at once, and neither matters until it does
A section carrying shear has less moment capacity, and the reduction is the web's share of the plastic modulus times one minus the root of one minus the shear ratio squared. On a rolled beam that share is a quarter, so half the shear capacity costs three and a half per cent — and then the last tenth costs more than the first eight.
Named alongside it
The objects these essays reach for when they reach for this one.
UtilisationBending momentBending stressContinuous beamDeflectionFlangeFully stressed designHaunchInteractionMoment diagramPlastic hingePlastic modulus