Design Principles of C-channel Steel in Solar Brackets C-channel steel is designed with a C-shaped cross-section, providing excellent stiffness and resistance to bending forces. But does this mean U-shaped models are becoming obsolete? Hardly. Let's examine three critical selection factors: 1. Environmental Adaptability Coastal projects in hurricane-prone zones (like. . 5B steeland aluminum alloy extrusion profile AL6005-T5. Z BEAM STEEL is a common cold-formed steel with thickness of generally 1. International Aluminum has introduced more than 200 sets of according to the given C shaped steel specifications. C-shaped ste roduction process of this type of steel is introduced.