Applied Couple on Simply Supported Beam

8 m simply supported beam with a 24 kN·m CCW couple at x = 3 m; the couple creates no shear but causes a 24 kN·m jump in the moment diagram and forces one reaction downward — a frequently mishandled sign-convention problem.

Category: beam · Difficulty: Basic

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All reaction values are computed by the StatIQ structural engine, not generated text. Signs follow the solver's convention: a positive R_y acts upward, a negative R_y downward; a positive M is counter-clockwise.