European H-beams (HEA/HEB/HEM) have web thicknesses that are nearly identical to their GB counterparts (HN/HM/HW), ensuring consistent shear capacity and load transfer when substituting:
Web Thickness Comparisons:
HEB 200 (web thickness 8 mm) vs. HW 200x200 (8 mm)-identical, ensuring the same shear capacity (critical for resisting lateral loads like wind or seismic activity).
HEA 200 (web thickness 8 mm) vs. HN 200x100 (5.5 mm)-HEA's thicker web provides higher shear capacity, making it suitable for applications where HN's thinner web may be insufficient.
HEM 300 (web thickness 16 mm) vs. HW 300x300 (heavy, 16 mm)-identical, ensuring both grades handle ultra-heavy shear loads (e.g., crane girders).
Impact on Performance: Web thickness directly affects shear strength-thicker webs resist higher shear forces without buckling. The identical web thicknesses between HEB/HW and HEM/HW heavy-duty grades mean they can be substituted without adjusting shear load calculations. For HEA/HN substitutions, the thicker HEA web provides a safety margin, reducing the risk of shear failure.
Fabrication Compatibility: Thicker webs require slightly longer drill bits for bolt holes, but this is a minor adjustment that does not affect overall fabrication efficiency. Chinese manufacturers commonly use drill bits compatible with both European and GB web thicknesses, ensuring no delays in assembly.
The alignment in web thickness between European and GB H-beams is a key technical factor in their equivalence, as it ensures consistent shear performance across substituted sections.