Lajè bride - distans orizontal ant kwen bride ekstèn- varye selon seri UB ak pwofondè, ak yon seri soti nan80 mm (HEA 80) a 420 mm (HEM 1000):
Seri HEA: Lajè bride 80-420 mm (egzanp, HEA 100: 100 mm, HEA 300: 300 mm).
Seri HEB: Lajè bride 80–420 mm (pa egzanp, HEB 120: 120 mm, HEB 400: 400 mm) (pi laj pase HEA pou menm pwofondè).
Seri HEM: Flange width 100–420 mm (e.g., HEM 140: 140 mm, HEM 500: 500 mm) (widest flanges for maximum stability).Flange width directly impacts load distribution and lateral stability- wider flanges reduce the risk of lateral-torsional buckling in long-span beams. EN 10025-2 specifies flange width tolerances: ±0.8 mm for widths ≤100 mm, ±1.0 mm for 101–200 mm, and ±1.5 mm for >200 mm. Tolerans sa yo asire UB asye koòdone kòrèkteman ak boulon, parantèz, ak lòt konpozan estriktirèl.