Banens tykkelse- den lodrette sektion, der forbinder flangerne- varierer efter UB-serie og dybde, med intervaller fra 4,0 mm (HEA 80) til 25,0 mm (HEM 1000):
HEA-serien: Banetykkelse 4,0–20,0 mm (f.eks. HEA 100: 5,0 mm, HEA 300: 10,5 mm).
HEB serien: Banetykkelse 4,5–22,0 mm (f.eks. HEB 120: 6,5 mm, HEB 400: 13,5 mm) (tykkere end HEA for højere forskydningskapacitet).
HEM serien: Web thickness 5.0–25.0 mm (e.g., HEM 140: 8.0 mm, HEM 500: 18.0 mm) (thickest webs for heavy shear loads).The web's primary role is to resist shear forces (e.g., wind, seismic loads). Thicker webs handle higher shear, making HEM series UB steel suitable for short-span, heavy-load applications (e.g., industrial crane girders). EN 10025-2 specifies web thickness tolerances: ±0.4 mm for thicknesses ≤10 mm, ±0.5 mm for 10.1–20 mm, and ±0.6 mm for >20 mm. Disse tolerancer sikrer ensartet forskydningsydelse på tværs af batcher.