What are the typical height ranges for UPE/UPN channel steels?

UPE and UPN channels have standard height ranges (measured from web top to bottom) from 50 mm (UPE 50/UPN 50) to 400 mm (UPE 400/UPN 400). Common sizes include UPE 100 (100 mm height), UPN 120 (120 mm height), UPE 200 (200 mm height), and UPN 300 (300 mm height). EN 10279 specifies height tolerances: ±1.0 mm for heights ≤100 mm, ±1.5 mm for 101–200 mm, and ±2.0 mm for >200 mm. These tolerances ensure compatibility with prefabricated components (e.g., bolts, brackets) and consistent structural performance. For example, a UPE 200 channel must maintain its 200 mm height to fit into a beam bracket designed for that size, avoiding installation delays.