View NCCI for Section 6: Resistance to transverse forces
Taken from BS EN 1993-1-5: 2006
Web bearing and Buckling resistance
Web bearing and buckling checks are described as 'local buckling effects' in clause 6.2.1(2). The actual checks are found in 1993-1-5, rather than 1993-1-1. This article in New Steel Construction describes the checks, and how the resistances are tabulated in the Blue Book.