Derive projected area, mass (from material density) and the permissible wind speed either from a photo of the load or by sketching its windward face. Output A_p, mass and V_allowed feed the same engine as the main workstation.
Image
No image yet. Use “Capture / upload” — on a phone this opens the camera.
Load an image to begin.
AScale source
A4 · 0.297 mA3 · 0.420 m1 m barBrick · 0.215 m
phone ≈ 65–70°
Pinhole model: real = px · D / fpx, fpx=Wimg/(2·tan(HFOV/2)). Assumes the face is perpendicular to the optical axis; oblique faces under-read. Confirm distance with a laser/tape.
BMeasure & material
Width × Height
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Projected A_p
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Volume
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Derived mass
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CWind check
Sketch the windward face
Click to drop vertices of the load outline. Close the shape to compute area & centre of gravity.
AScale & material
Face area A_p
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Centre of gravity
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Volume
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Derived mass
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BWind threshold
CG is the area centroid (centre of gravity for a uniform-density, uniform-thickness lamina). For composite/variable sections, sub-divide and combine — a production build would let you assign density per region.