For high-traffic environments, prioritize durability and cycle ratings. Ensure the door hardware (hinges, closers, and locks) is Grade 1 certified according to ANSI/BHMA standards, which guarantees performance over millions of cycles. Material thickness is critical; for steel doors, a minimum of 16-gauge is recommended for the face sheet. Additionally, verify the core material—honeycomb cores offer great strength-to-weight ratios, while polystyrene or polyurethane cores provide superior thermal insulation (R-value) for exterior applications.