Leadership

FIRE-RESISTING FLOORS.

Issue 7 and Volume 26.

FIRE-RESISTING FLOORS. (Specially written for FIRE AND WATER.) (Concluded.) ONE very modern type of fire-resisting floor makes use of triangular lintels, which pass from joist to joist and rest on the lower flange, whose under surface they cover. The older type is shown in figs. 14, 15, while the newer is illustrated in fig. 18. Figs. 16, 17, and 18 show a combination of lintels, all flat, of T section, and corrugated iron permanent centering. Fig. 19 is a floor of solid concrete, with terra cotta casings to flanges —a form of floor which of course, calls for temporary centering. The concrete is absent in fig. 16, but is shown in fig. 18. In fig. 20 clay shields protect the lower flanges of the joists and support a corrugated permanent centering for the concrete—there bring besides a suspended ceiling of wire lathing and plaster. In figs. 21. 22, and 28…

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