HEB steel can be tailored through four primary methods to address unique requirements:
Dimensional Customization:
Length Adjustment: Cut to exact project needs (e.g., 24m spans for airport hangars), reducing on - site waste by 90%.
Thickness Modification: Web/flange thicknesses can be adjusted within EN 10034 tolerances-e.g., increasing tf from 13.5mm to 15mm in HEB 200 for higher shear resistance.
Material Engineering:
Alloy Additions: Nickel (Ni) improves low - temperature toughness (for Arctic projects, - 40°C), while chromium (Cr) enhances corrosion resistance (marine environments).
High - Strength Grades: S460N HEB steel (fy=460 MPa) is used in specialized applications like heavy - duty cranes.
Surface Treatments:
Hot - Dip Galvanization: Adds a 85–100μm zinc layer, extending corrosion life to 50+ years in coastal areas (e.g., HEB steel in Hong Kong-Zhuhai-Macao Bridge).
Fire Protection Coatings: Intumescent paints on HEB 300 beams in tunnels increase fire resistance to 120 minutes, meeting EN 13381 - 8 standards.
Pre - Fabrication Enhancements:
Drilled Holes: Pre - punched bolt holes (e.g., M24 threads on HEB 400 flanges) speed up on - site assembly by 40%.
Stiffener Plates: Welded during manufacturing to reinforce stress points in bridge piers or machine supports.
