Angle steel's L-shape delivers unique engineering benefits:
High Strength-to-Weight Ratio:
An equal-leg angle (∠70×70×6) supports 15% more tension than a flat bar of the same weight, reducing material use by 10–12% in truss systems.
Versatile Connection Design:
Perpendicular legs enable easy welding/bolting for rigid frames. For example, ∠80×80×8 forms triangular bracings in roof trusses, resisting 1.8 kN/m² wind loads.
Cost-Effectiveness:
Hot-rolled angles (e.g., Q235) are 20–25% cheaper than H-beams for light loads. Prefabricated ∠63×63×5 components cut on-site labor by 30%.
Corrosion Resistance:
Galvanized angles (85μm zinc coating) last 40+ years in coastal areas, while Corten angles self-protect via a rust layer for outdoor use.