Two-piece track system

摘要

A fire-rated receiver channel includes at least one intumescent or other fire-resistant material strip. The receiver channel can nest with a framing member, such as metal tracks, headers, header tracks, sill plates, bottom tracks, metal studs, wood studs or wall partitions, and placed at a perimeter of a wall assembly to create a fire block arrangement. In other arrangements, a track assembly includes two nested tracks, an inner track and outer track. The assembly is designed so that the outside width of the outer track is equal to or less than the outside width of the inner track to present a substantially flush external surface for attachment of exterior sheathing elements when the assembly is used in an external wall.

主权项

1. A method of assembling a fire-rated wall having a linear wall gap, comprising:
attaching a footer track to a horizontal floor element; attaching an outer track to a horizontal ceiling element, the outer track comprising a web, a first flange and a second flange, wherein the web is substantially planar and has a first side edge and a second side edge, the first flange and the second flange extend in the same direction from the first and second side edges, respectively, wherein each of the first and second flanges is substantially planar such that the outer track defines a substantially U-shaped cross section, each of the first and second flanges has a free end opposite a respective one of the first side edge and second side edge, the first and second flanges of the outer track defining a minimum internal width, the outer track having at least one heat-expandable intumescent strip attached thereto such that the at least one heat-expandable intumescent strip extends lengthwise along a surface of the outer track; positioning an inner track within the outer track, the inner track comprising a web, a first flange and a second flange, wherein the web is substantially planar and has a first side edge and a second side edge, the first flange and the second flange extend in the same direction from the first and second side edges, respectively, wherein each of the first and second flanges is substantially planar such that the inner track defines a substantially U-shaped cross section, such that the outer track and the inner track are aligned with one another in the same direction, the first and second flanges of the inner track defining maximum external width dimension, wherein the minimum internal width of the outer track is greater than the maximum external width dimension of the inner track and the inner track is nested within the outer track; positioning a plurality of studs between the footer track and the inner track and attaching each of the studs to at least one of the footer track and the inner track; and attaching at least one piece of wallboard to the plurality of studs.