File:Fse-progressive-collapse-v1.svg

Fse-progressive-collapse-v1.svg (SVG file, nominally 900 × 600 pixels, file size: 9 KB)

Summary

The same frame after the loss of one column. Left: the loads find an alternate path and the damage stays local. Right: the failure spreads from element to element. Based on National Institute of Standards and Technology (2005), p. 206, and Australian Building Codes Board (2020b), p. 91.

Original illustration for Progressive collapse, level 4 Expert.

Source basis: National Institute of Standards and Technology (2005), p. 206 (alternate load paths; removal of one or two columns as design initiating event); Australian Building Codes Board (2020b), p. 91 (notional removal of a column; collapse not to extend beyond immediately adjacent storeys); National Institute of Standards and Technology (2008), p. xxxvi (vertical and horizontal progression)
Alt text: Two elevations of the same six-storey frame with one ground-floor column removed: left, the floors above bridge the gap; right, failure spreads up and sideways.

Licensing

New drawing by Fire Safety Academy. © Fire Safety Academy.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	17:25, 2 November 2026		900 × 600 (9 KB)	Jan (talk \| contribs)	Watermark: Fire Safety Academy logo icon, 70 px, 45 % opacity

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Progressive collapse

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Short title	The same frame after the loss of one column. Left: the loads find an alternate path and the damage stays local. Right: the failure spreads from element to element. Based on National Institute of Standards and Technology (2005), p. 206, and Australian Building Codes Board (2020b), p. 91.
Image title	Two elevations of the same six-storey frame with one ground-floor column removed: left, the floors above bridge the gap; right, failure spreads up and sideways. Source basis: National Institute of Standards and Technology (2005), p. 206 (alternate load paths; removal of one or two columns as design initiating event); Australian Building Codes Board (2020b), p. 91 (notional removal of a column; collapse not to extend beyond immediately adjacent storeys); National Institute of Standards and Technology (2008), p. xxxvi (vertical and horizontal progression)
Width	900
Height	600