Patent ID: 7503145
Filing Date: 2009-03-17
Classification: E04C,E04F,F21S,F21V

Abstract:
1. The fire-resistance-rated, floor-ceiling assembly having: a pre-assembled, fire-resistance-rated, recessed lighting assembly installed above a room and projecting light through an opening in said fire-resistance-rated floor-ceiling assembly into said room, wherein said fire-resistance-rated floor-ceiling assembly had an original fire resistance rating before said opening was made therein and exhibits (i) an upper surface facing an interior of said fire-resistance-rated floor-ceiling assembly, and (ii) a lower surface facing a room below said fire-resistance-rated floor-ceiling assembly, wherein fire resistance is determined by (i) exposing to fire for one hour in accordance with ASTM E119 (1999) in which a 48 inch by 48 inch small scale floor-ceiling assembly constructed with a joist cavity containing a recessed light assembly and an adjacent joist cavity without a recessed light assembly is so exposed and (ii) measuring air temperatures in the joist cavities, whereby a one hour fire resistance rating is achieved when temperature measurements in the joist cavity with an incandescent light fixture is no more than 5% hotter than temperatures measured in the adjacent joist cavity without said light fixture, said pre-assembled, fire-resistance-rated, recessed lighting assembly with a combination comprising: wherein said pre-assembled, fire-resistance-rated, recessed lighting assembly maintains said original fire resistance rating of said fire-resistance-rated, floor-ceiling assembly before said opening was made therein for installing said pre-assembled, fire-resistance-rated, recessed lighting assembly therein.