Page 212 - Structural Steel Designers Handbook AISC, AASHTO, AISI, ASTM, and ASCE-07 Design Standards

Brockenbrough_Ch04.qxd 9/29/05 5:09 PM Page 4.40

BUILDING CODES, LOADS, AND FIRE PROTECTION*

4.40 CHAPTER FOUR

One approach for meeting code requirements for structural fire protection when the appearance
of architecturally exposed steel is desired is illustrated in Fig. 4.12. As shown, flanges of a steel col-
umn are fire protected with a spray-applied material, insulation is placed against the web between
the flanges, and the assembly is enclosed in a metal cover with the shape of the column.
Another approach is to use tubular columns filled with water (Fig. 4.13). Originally patented in
1884, this system was neglected until the late 1960s, when it was adopted for the 64-story U.S.
Steel Building in Pittsburgh, Pa. Since then, several other buildings have been designed using this

FIGURE 4.12 Fire-protected exterior steel column with exposed metal column covers.

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