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Sheet Metal Bend Allowance Calculator

What is bend allowance in sheet-metal fabrication?

Bend allowance is the arc length of the neutral axis through the bend region. It is commonly computed as BA = θ(rad) × (R + K × T), where θ is bend angle, R is inside radius, T is thickness, and K locates the neutral axis.

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Related questions

Estimates and general guidance only. Verify against your local code and AHJ before any installation. Gas, electrical, and refrigerant work is hazardous to untrained users.

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