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Steel Connection Designer for a mezzanine floor

Simulate a mezzanine floor live in your browser. This runs the real Steel Connection Designer solver — adjust the inputs, watch it respond instantly, and export the result. No install, no account.

Shear & Moment DiagramsLive

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.

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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.

Mohr's CircleLive

Controls

Presets

Mohr's circle is a graphical way to transform a 2D stress state to any rotated axis. The circle's center is the average normal stress and its radius is the maximum shear. Where it crosses the horizontal axis gives the principal stresses — the orientation with zero shear. Educational tool.

▶ Run in Python

Data Inspector

σ₁ (max principal)92.4 MPa
σ₂ (min principal)7.6 MPa
τmax42.4 MPa
Principal angle22.5°

Governing equation

Reading this result: The circle radius sets τmax = 42.4 MPa on planes 45° from the principals; rotate the element by 22.5° to reach the shear-free principal orientation.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

Fatigue (S-N Curve)Live

Controls

Presets

Repeated loading well below the ultimate strength can still break a part — metal fatigue. The S-N curve plots stress amplitude against cycles to failure. Steels have an endurance limit: below it they last essentially forever, but aluminum has none and eventually fails at any stress. Cause of many catastrophic aircraft and bridge failures.

▶ Run in Python

Data Inspector

Endurance limit250 MPa
Cycles to failure1.17e+5
Verdictfinite life

Governing equation

Reading this result: At 300 MPa the part fails after about 1.2e+5 cycles. Drop below the 250 MPa endurance limit to reach infinite life.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

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About this simulation

The full Steel Connection Designer tool models a mezzanine floor with the same numerics engineers and scientists use — running entirely client-side. Change any parameter and the result updates in real time, so you can build intuition, check a design, or teach the concept without spreadsheets or installs.

More you can do with Steel Connection Designer

Other ways to simulate a mezzanine floor

Frequently asked questions

How do I simulate a mezzanine floor?
Open this page and use the live Steel Connection Designer tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.
Is it free?
Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.
Can I use my own numbers?
Absolutely — every input is adjustable, and with data import you can drive a mezzanine floor from your own measurements.