PANGA STEEL — AS 4100 Code ⟂ FEM Live Demo

Exaggeration drag to orbit · scroll to zoom

Elastic buckling moment — the cross-check

CODE LANE

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M_o · AS 4100 cl 5.6.1.1(a)
closed form

FEM LANE

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M_cr · eigenvalue analysis
12 Hermite elements

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The FEM derives M_cr from stiffness and geometry alone — no code formula. Agreement is a genuine two-independent-sources verification, and the animated shape in the viewport is the actual computed eigenvector, not an illustration.

Member capacity ladder — AS 4100:2020

	value	clause

Glass-box calc trace — every formula, substitution, result

Ray-traced on the PangaCAD render GPU

Path-traced (Blender Cycles, RTX 6000 Ada 48GB) from the same section geometry and the same FEM mode shape driving the viewport above. Renders arrive here straight from the render service.

Hero render — 460 UB 74.6 at full LTB mode amplitude, path-traced steel.

Turntable — the designed member, photoreal, 360°.

Lateral-torsional buckling mode — the FEM eigenvector animated: lateral sweep + twist, exactly what governs φM_b.

One render service — every material

The same material-agnostic pipeline, pointed at a concrete element: a straight-flight stair rebar cage generated by the live PangaCAD/SABS detailing engine (span 3.0 m, rise 1.5 m, Y12@150 mains, Y10@250 distribution, 25 mm cover). Steel pilots the pipeline; concrete — the shipping product — consumes it on day one.

X-ray view — ghost concrete revealing the as-designed cage: main bars (steel) and distribution bars (green), exact cover and spacing.

Cage turntable — every bar where the bending schedule puts it: exact cover, spacing and laps, straight from the engine that also writes the BBS.

The product FEM viewer — rendered server-side

Squama's FEM Results Viewer (the shipped PangaCAD frontend, unmodified) driven headless on the render server: buckling mode λ = 3.42 of a 3.0 × 1.2 m plate, ModeShapePlayer animating. What you see here is pixel-identical to the engineer's browser — the render service photographs the product, it never re-implements it.

Viewer still — buckling tab, mode-amplitude contour, Euler chip (K + λKG)φ = 0.

Mode animation — ModeShapePlayer captured to MP4, shareable anywhere.