Do I need to install anything?

No. It runs in any modern browser, free, with no account required.

For Researchers · Roof Truss Analyzer

Roof Truss Analyzer for a crane boom

Built for researchers prototyping or validating an idea. Prototype fast, reproduce exactly, and share a citable, interactive version of your model. Simulate a crane boom live below — adjust the inputs and watch it respond, right in your browser.

FEA Truss

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FEA — 2D Truss StudioLive

direct stiffness method · axial forces

Controls

A finite-element truss under a tip load. Members are colored by axial force; the shape shows the (scaled) deformation.

Presets

Tip load (down)

Deformation ×

▶ Run in Python

Data Inspector

Nodes7

Members11

Solvesingular

Max displacement0.000

Max axial force0.0

Governing equation

K u = F, k_{e} = \frac{E A}{L}, F_{y} = - 20 (11 members)

Reading this result: A 20-unit tip load drives a peak member force of 0.0. Linear FEA is linear: double the load and both the deflection and every member force double exactly. The 20x slider only magnifies the true (tiny) displacement so you can see it.

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

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Column Buckling

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Column Buckling (Euler)Live

critical load & slenderness

Controls

Presets

Young's modulus E (GPa)

Moment of inertia I (10⁶ mm⁴)

Length L (m)

Cross-section area (mm²)

A slender column fails not by crushing but by buckling sideways at the Euler critical load Pcr = π²EI/(KL)². The effective-length factor K depends on the end restraints — fixing both ends quadruples the capacity versus pinned. Educational tool, not a substitute for code-based design.

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Data Inspector

Critical load Pcr2193 kN

Effective length3.00 m

Slenderness KL/r52

Critical stress731 MPa

Governing equation

P_{cr} = \frac{π ^{2} E I}{( K L ) ^{2}} = \frac{π ^{2} ( 200 GPa ) ( 10 \times 1 0 ^{6} mm ^{4} )}{( 1 \times 3 m ) ^{2}} = 2193 kN

Reading this result: Intermediate slenderness (KL/r = 52): buckling and yielding compete, so design codes blend the two rather than trusting Euler alone.

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

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Beam Deflection

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Beam Deflection & BendingLive

Euler-Bernoulli beam theory

Controls

Presets

Span L (m)

Load P (kN)

Flexural rigidity EI (kN·m²)

Euler-Bernoulli theory relates a beam's deflection and internal moment to its load, span, and flexural rigidity EI. Deflection grows with the cube or fourth power of span, which is why doubling a span is far worse than doubling the load. Educational tool — not a substitute for a stamped structural design.

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Data Inspector

Max deflection1.30 mm

Max moment12.5 kN·m

Span/deflectionL/3840

Governing equation

δ = \frac{P L ^{3}}{48 E I} = \frac{10 \cdot 5 ^{3}}{48 \cdot 20000} = 1.30 mm

Reading this result: At L/3840 this beam clears the usual L/360 serviceability limit, so strength (not deflection) is likely to govern the design.

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

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Also for:Students Educators Engineers Hobbyists & Makers K-12 Students First Responders General version →

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Frequently asked questions

Is this good for researchers?: Yes — this version of "Roof Truss Analyzer for a crane boom" is framed for researchers prototyping or validating an idea. Prototype fast, reproduce exactly, and share a citable, interactive version of your model.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.