For First Responders · Shear & Moment
Shear & Moment for a stair stringer
Built for first responders planning or training for real incidents. Run fast what-if scenarios for response planning and training — no software to install in the field. Simulate a stair stringer live below — adjust the inputs and watch it respond, right in your browser.
Shear & Moment DiagramsLive
simply-supported beam
Controls
Presets
Shear and bending-moment diagrams show the internal forces along a beam. Shear jumps at each point load; the moment is the running integral of shear and peaks where shear crosses zero. Engineers size beams for this maximum moment. Educational tool, not a substitute for structural design.
Data Inspector
Reaction A28.3 kN
Reaction B21.7 kN
Max moment46.6 kN·m
at x2.01 m
Governing equation
Reading this result: Combined loading: reactions RA=28.3 and RB=21.7 kN, and the maximum moment 46.6 kN·m lands at x=2.0 m where shear crosses zero.
Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.
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Frequently asked questions
- Is this good for first responders?
- Yes — this version of "Shear & Moment for a stair stringer" is framed for first responders planning or training for real incidents. Run fast what-if scenarios for response planning and training — no software to install in the field.
- Do I need to install anything?
- No. It runs in any modern browser, free, with no account required.