File:Fse-structural-fire-engineering-v3.svg

Fse-structural-fire-engineering-v3.svg (SVG file, nominally 900 × 600 pixels, file size: 7 KB)

Summary

Thermal expansion of heated floor beams pushed a girder off its seat at a column in World Trade Center 7. Based on National Institute of Standards and Technology (2008), pp. 21–22.

Original vector illustration for Structural fire engineering, level 2 Intermediate.

Source basis: National Institute of Standards and Technology (2008), p. 21 (expansion at or below about 400 °C; forces when expansion is resisted) and p. 22 (girder between Columns 79 and 44 pushed west, walked off its support at Column 79)
Alt text: Plan sketch of a floor: heated beams expand and push a girder sideways until it slides off its seat at a column.

Licensing

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

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	17:15, 2 November 2026		900 × 600 (7 KB)	Lisa (talk \| contribs)	Watermark: Fire Safety Academy logo icon, 70 px, 45 % opacity

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Structural fire engineering

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Short title	Thermal expansion of heated floor beams pushed a girder off its seat at a column in World Trade Center 7. Based on National Institute of Standards and Technology (2008), pp. 21–22.
Image title	Plan sketch of a floor: heated beams expand and push a girder sideways until it slides off its seat at a column. Source basis: National Institute of Standards and Technology (2008), p. 21 (expansion at or below about 400 °C; forces when expansion is resisted) and p. 22 (girder between Columns 79 and 44 pushed west, walked off its support at Column 79)
Width	900
Height	600