Empirical rule — where it appears
The tear that goes diagonally, and the correction that has no derivation
Stagger the holes so that no straight line crosses more than one and the plate does not get its strength back. The tear runs at an angle instead, and the arithmetic that makes it come out right is a century-old piece of curve-fitting nobody has improved on.
The flange that is not all there
Stress can only get into a wide flange through shear along its junction with the web, and shear takes distance to do it. So the width that is working is set by the span, and a flange 3 m wide on a 20 m span has 18762 mm² of steel that is there, and paid for, and hardly carrying anything.
Named alongside it
The objects these essays reach for when they reach for this one.
Bolt groupConnectionEffective widthEfficiencyLoad pathNet sectionPlane sectionsSaint-Venant's principleShear flowShear lagShear planeStagger