Fire barrier reservoir

DETAILED DESCRIPTION In the accompanying drawings and particularly FIG.
1 thereof a roofing structure is illustrated which includes spaced apart steel joints illustrated generally by the numeral 1.
Upon such roof joists a metal decking 3 is supported and on this metal decking is mounted a fireproof member 5 composed of a plurality of sections designated by the numerals 7, 9 and 11, the edges of the sections abutting to provide seams 13 therebetween.
The sections 5 of the fireproof member are preferably formed of plasterboard and such plasterboard sections may be on the order of 5/8" in thickness.
The plasterboard sections 5 may be secured in any suitable manner to the metal deck 3.
The reservoir board has been designated in its entirety by the numeral 15 and may be formed of gypsum, fiberboard, Perlite, or any other suitable material and is preferably on the order of 1/2" in thickness.
The reservoir board 15 is provided with a plurality of apertures 17 therein and is also provided with visible indicia lines 19 on the upper surface thereof, the function of these indicia lines will be made clear hereinafter.
At this time, however, it should be noted that no apertures 17 are formed on the visible indicia lines 19 and while I have illustrated in the drawings the apertures 17 being of circular configuration it is to be distinctly understood that they may be rectangular, diamond shaped, or of any other suitable configuration and still fall within the spirit and scope of this invention.
The reservoir board 15 is mounted on the fireproof sheet rock sections 7, 9 and 11, and is affixed thereto by glueing or in any other suitable manner.
Insulation 21 is mounted and supported on and covers the top of the reservoir board 15.
The insulation 21 is preferably of a plastic air entrapment type and, as will become more evident as this description proceeds, when the insulation is subjected to heat it becomes a flowable molten mass.
The insulation 21 may be affixed to the reservoir board 15 in any suitable manner