Fire extinguishing system and apparatus

Claim 1

IN A BUILDING HAVING A STRUCTURAL FRAMEWORK AND CELLULAR METAL FLOORING SECURED TO SAID FRAMEWORK, SAID CELLULAR METAL FLOORING BEING ASSEMBLED IN SECTIONS AND SERVING AS A LOAD-SUPPORTING ELEMENT OF THE SAID BUILDING, EACH OF SAID SECTIONS BEING FORMED FROM TWO CORRELATIVE SHEETS OF METAL, CORRUGATIONS IN AT LEAST ONE OF SAID TWO SHEETS OF METAL, THE SAID TWO SHEETS OF METAL BEING SECURED TOGETHER ALONG SPACED CONTIGUOUS PORTIONS CORRESPONDING TO THE SAID CORRUGATIONS WHEREBY LONGITUDINAL CELLS ARE FORMED BETWEEN THE TWO SAID SHEETS OF METAL, THE COMBINATION THEREWITH OF: A FLAT STRIP OF METAL BEING SECURED ALONG ITS EDGES BY A WATERTIGHT SEAM TO A CORRUGATED SHEET OF THE SAID TWO METAL SHEETS ALONG THE OUTER SURFACE OF A PAIR OF ADJACENT CELLS, SAID STRIP OF METAL COMBINING WITH THE INTERVENING PORTIONS OF THE SAID CORRUGATED SHEET TO DEFINE A FLUID CONDUIT, AT LEAST ONE OUTLET DEPENDING DOWNWARDLY FROM SAID CONDUIT INTERMEDIATE ITS ENDS FOR DISCHARGING FLUID FROM SAID CONDUIT, EACH SAID OUTLET BEING CONNECTED TO A FLUID DISTRIBUTING NOZZLE POSITIONED IN SPRAYING RELATION WITH THE SUBJACENT FLOOR SPACE, A FLUID SUPPLY PIPE EXTENDING TRANSVERSELY OF SAID CONDUIT, AND FLUID CONNECTIONS BETWEEN THE SAID SUPPLY PIPE AND THE SAID CONDUIT.