Patent ID: 9284730
Filing Date: 2016-03-15
CPC Classification: E04B

Claim Text:
1. A two component control joint backer assembly in combination with a wall assembly, comprising: a plurality of studs having upper and lower ends, the studs being vertically positioned relative to the ceiling and floor such that the uppers ends are engaged within a header track and the lower ends are engaged within a footer track; first and second pieces of wallboard attached to the plurality of studs, the first and second pieces of wallboard being adjacent to each other and separated apart from each other so as to define a control gap between them, the first and second pieces of wallboard having inward and outward facing surfaces; a first component of the two-component control joint backer assembly comprising a first strip of a sheet-metal positioned within the wall assembly and against the inward facing surfaces of the first and second pieces of wallboard, the first sheet-metal strip connecting the first and second pieces of wallboard together along the length of the control gap, the first sheet-metal strip having a first flexible central bend portion that runs along the length of the control gap and allows for lateral expansion and contraction of the first and second pieces of wallboard; a second component of the two-component control joint backer assembly comprising a second strip of a sheet-metal positioned on the wall assembly and against the outward facing surfaces of the first and second pieces of wallboard, the second sheet-metal strip connecting the first and second pieces of wallboard together along the length of the control gap, the second sheet-metal strip having a second flexible central bend portion that runs the length of the control gap and allows for lateral expansion and contraction of the first and second pieces of wallboard, the second flexible central bend portion being positioned within the control gap, and wherein the first and second sheet-metal strips seal the control gap; and an intumescent material strip positioned along and within the first flexible central bend portion of the first sheet-metal strip and above and spaced apart from a surface of the first flexible central bend portion of the first sheet-metal strip to thereby define an expansion gap that runs the length of the first flexible central bend portion of the first sheet-metal strip.