File:Fse-biot-number-v4.svg

Fse-biot-number-v4.svg (SVG file, nominally 900 × 600 pixels, file size: 7 KB)

Summary

Cross-sections of a wide-flange (I) section and a hollow section. The heated perimeter D is traced in orange; W/D and A/P relate the steel mass or area to that perimeter. Based on Milke (2002), pp. 4-216 and 4-223.

Original illustration for Biot number, level 4 Expert.

Source basis: Milke (2002), p. 4-216 (definitions of W/D and A/P, W/D relates to density times A/P) and p. 4-223, Figure 4-9.16 (heated perimeters for steel shapes; redraw, do not copy)
Alt text: Two steel sections: an I-section with its heated perimeter traced around it and a square hollow section with its outer perimeter traced.

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

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	17:11, 2 November 2026		900 × 600 (7 KB)	Jan (talk \| contribs)	Watermark: Fire Safety Academy logo icon, 70 px, 45 % opacity

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Biot number

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Short title	Cross-sections of a wide-flange (I) section and a hollow section. The heated perimeter D is traced in orange; W/D and A/P relate the steel mass or area to that perimeter. Based on Milke (2002), pp. 4-216 and 4-223.
Image title	Two steel sections: an I-section with its heated perimeter traced around it and a square hollow section with its outer perimeter traced. Source basis: Milke (2002), p. 4-216 (definitions of W/D and A/P, W/D relates to density times A/P) and p. 4-223, Figure 4-9.16 (heated perimeters for steel shapes; redraw, do not copy)
Width	900
Height	600