| 摘要 |
<p>A device for enabling cables to be pulled therethrough and through a cellular floor system in which the device is adapted to be mounted, for activating a service fitting at a desired location in the floor. The device is press-fittable into aligned substantially uniform-diameter holes, formed through the slab floor, after setting of the concrete therein, and through an adjacent wall of a raceway cell in an underfloor raceway cellular deck. It is adapted to engage the floor at one end of the device, and to automatically engage the wall of the raceway cell at the other end of the device, for rapidly and efficiently mounting the device in the holes formed through the floor and raceway cell wall. It is further adapted to prevent transmission of heat, fire, or smoke from the floor below, to the floor above, through the device; or through the holes in the floor and raceway cell wall in which the device is mounted. This restores the fire rating of the floor, with the hole formed therethrough, to substantially the fire rating of the floor as it was without the hole formed therethrough, enabling the device to be certified as a fire-rated slab penetration, fully approved, listed, and classified for fire resistance. The device includes a hollow housing, including a toggle mechanism for securing the device to the raceway cell wall at one end of the device. The toggle mechanism includes pivoted members, automatically extendable into engaging relation relative to the wall of the raceway cell, when such members clear the raceway cell wall upon insertion of the device therethrough. The device further includes an adjusting mechanism for securing the device to the floor, operable from the other end of the device. The adjusting mechanism is automatically adaptable to accommodate a range of variedthicknesses in slab floors. The device still further includes intumescent members, in the hollow housing, which expand under self-generated pressure, upon being subjected to heat. The intumescent members in the housing expand under such pressure to fill the hollow channel in the device through which the cables pass, and any space formed by any burned-off insulation of the cables passing therethrough, and fill the hole in which the device is mounted, to prevent transmission of heat, fire, or smoke therethrough.</p> |
