File:Fse-trench-effect-v1.svg

Fse-trench-effect-v1.svg (SVG file, nominally 900 × 600 pixels, file size: 7 KB)

Summary

The configuration of the King's Cross fire: fire spreading up the steps of a wooden escalator between its sidewalls, which caused the flames to hug the steps. Based on Quintiere (2002b), p. 2-254.

Original illustration for Trench effect, level 4 Expert.

Source basis: Quintiere (2002b), p. 2-254 (London King's Cross fire, spread up a wooden escalator, sidewalls caused the flames to "hug" the steps); p. 2-257 (title of the experimental study of the "trench effect")
Alt text: Side view of an inclined escalator between two sidewalls, with flames lying low along the steps, and a cross-section showing the trench shape.

Licensing

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

File history

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	17:12, 2 November 2026		900 × 600 (7 KB)	Jan (talk \| contribs)	Watermark: Fire Safety Academy logo icon, 70 px, 45 % opacity

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Trench effect

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Short title	The configuration of the King's Cross fire: fire spreading up the steps of a wooden escalator between its sidewalls, which caused the flames to hug the steps. Based on Quintiere (2002b), p. 2-254.
Image title	Side view of an inclined escalator between two sidewalls, with flames lying low along the steps, and a cross-section showing the trench shape. Source basis: Quintiere (2002b), p. 2-254 (London King's Cross fire, spread up a wooden escalator, sidewalls caused the flames to "hug" the steps); p. 2-257 (title of the experimental study of the "trench effect")
Width	900
Height	600