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: Most residential codes require a minimum diameter (often 60 inches) to ensure the staircase is safe for regular use. Ensure your ceiling opening is at least 2 inches larger than the staircase diameter to provide proper hand clearance.

: Often cited by experts at The Iron Shop as a standard for DIY projects, these kits feature high-strength steel and a modular design that can be customized with various tread and handrail options. Minka Steel Spiral Staircase buy metal spiral staircase

: Always check your local regulations regarding "riser height" and "tread depth." While many kits are adjustable, some may require specific configurations to be fully code-compliant. : Most residential codes require a minimum diameter