Concept
Lateral restraint
2 essays name this object, across one field. What follows is each of them, and the objects they name alongside it.
The beam that fails sideways
A deep narrow beam bending in its strong plane can, at a moment well below its capacity, swing out of that plane and twist. The failure has nothing to do with how much it can carry and everything to do with what is holding it.
The brace that need not be strong
A brace holding a column at mid-height carries almost no force. What it has to be is stiff — and the stiffness required is exact, large, and reached at a knee past which more buys nothing at all.
Named alongside it
The objects these essays reach for when they reach for this one.
Effective lengthBracingBuckled mode shapeCompression flangeCritical loadCritical momentEigenvalueImperfectionLateral torsional bucklingMoment diagramStiffnessTorsion