How do I simulate a building collapse?

Open this page and use the live Blast Standoff tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.

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 building collapse from your own measurements.

Use case · powered by Blast Standoff

Blast Standoff for a building collapse

Simulate a building collapse live in your browser. This runs the real Blast Standoff solver — adjust the inputs, watch it respond instantly, and export the result. No install, no account.

For:Students Researchers Educators Engineers Hobbyists & Makers K-12 Students First Responders

Blast Standoff / OverpressureLive

cube-root scaling

At 30 m from 10 kg

7.8 kPa

Window breakage

Controls

Presets

Charge (kg TNT eq.)

Distance (m)

83 kPa — Severe structural / lethal

35 kPa — Serious injury, wall collapse

14 kPa — Eardrum rupture risk

3.5 kPa — Window breakage

Peak incident overpressure follows Hopkinson-Cranz cube-root scaling: the scaled distance Z = R/W^(1/3) sets the blast pressure. Rings show injury and damage thresholds. Screening estimate for standoff planning only — consult EOD and published safe-distance tables on scene.

▶ Run in Python

Data Inspector

Overpressure7.8 kPa

In psi1.13

Window-safe standoff65 m

Governing equation

Z = \frac{R}{W ^{1/3}} = \frac{30}{1 0 ^{1/3}} = 13.92 m/k g^{1/3} \Rightarrow P_{so} \approx 7.8 kPa

Reading this result: At 30 m from 10 kg the scaled distance is Z ≈ 13.9 m/kg^1/3, giving about 8 kPa (window breakage) — since Z = R/W^(1/3), the same pressure ring scales with the cube root of charge, so 8× the explosive only doubles every safe radius.

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

or unlock everything with Pro →

About this simulation

The full Blast Standoff tool models a building collapse 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 Blast Standoff

Blast Standoff for a house fire Blast Standoff for a wildfire Blast Standoff for a hazmat spill Blast Standoff for a mass-casualty scene Blast Standoff for a flood rescue Blast Standoff for a chemical leak Blast Standoff for a search-and-rescue grid Blast Standoff for a triage station

Other ways to simulate a building collapse

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Frequently asked questions

How do I simulate a building collapse?: Open this page and use the live Blast Standoff 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 building collapse from your own measurements.