Garage Door Torsion Spring IPPT Torque & 25k-Cycle Wire Sizer

Deterministic Helical torsion shear stress Wahl factor + IPPT (Inch-Pounds Per Turn = E*d^4 / 3670*D) + S-N fatigue cycle curve engine (.pdf, .json, .csv) built for Hormann, LiftMaster, Sommer, Alutech — zero-upload ephemeral Wasm RAM execution.

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