Patent ID: 8720138

Claim:
A building joint fire barrier operable to be compressed within a gap between a first load bearing budding element and a second load bearing budding element, said fire barrier comprising: a first intumescent section with a surface positioned adjacent to the first load bearing building element; a second intumescent section with a surface positioned adjacent to the second load bearing building element; at least one foam section being compressible and flammable and having edges, wherein the foam section is positioned between the first and second intumescent sections such that the edges of the foam section are not covered by either of the intumescent sections; an encapsulant covering at least a portion of the first and second intumescent sections and the foam section; and one or more support sections positioned within the gap, wherein the building joint fire barrier is positioned within the gap such that no single intumescent section or foam section spans the entire width of the gap between the two building elements and the foam section edges are neither covered by intumescent sections nor in contact with the building elements and the building joint fire barrier is enabled to retain its position within the gap even if the gap shifts, expands, contracts, or otherwise changes form due to environmental or structural factors.