What is the difference between equal-side and unequal-side angle steel in applications?

Equal-side angle steel (∠a×a×t) is used for symmetric load-bearing scenarios, such as: 1) Construction: Framing for small workshops, roof trusses, and guardrails (e.g., ∠40×4 for guardrail posts); 2) Machinery: Bases for small equipment and support brackets (e.g., ∠50×5 for motor supports). Unequal-side angle steel (∠a×b×t, a>b) is ideal for asymmetric loads, including: 1) Structural connections: Joining beams of different heights (e.g., ∠75×50×6 for connecting a 300mm beam to a 200mm beam); 2) Transportation: Trailer frames and cargo racks (e.g., ∠100×63×8 for distributing weight unevenly across the frame). The unequal design allows better force distribution in non-symmetric structures, avoiding stress concentration.