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Transom
Strength
Calculator
Calculate transom structural requirements for outboard engine mounting per ABYC H-4
Input Parameters
Engine Horsepower (HP)
Engine Weight (lb)
Number of Engines
Transom Height (in)
Transom Width (in)
Calculate
Results
--
Max Thrust Load
lb
--
Total Weight on Transom
lb
--
Min Transom Thickness
in
--
Bolt Pattern
Reference
ABYC H-4: Transom must support static + dynamic loads Thrust ≈ 10 lb per HP Dynamic factor 2.5x for wave impact Minimum 1.5" solid for outboards