Fire barrier, a method for installing the same, an expansion joint system and a fire barrier assembly

1. A fire barrier comprising:

a first fire blanket having a top side, a bottom side, a first lateral side and a second lateral side,

a second fire blanket having a top side, a bottom side, a first lateral side and a second lateral side, said second fire blanket,

a first intumescent sheet having a first surface and a second surface, said first intumescent sheet affixed to a first structure,

a second intumescent sheet having a first surface and a second surface, said second intumescent sheet affixed to a second structure; and

at least one flame retardant element disposed on the top side of the first fire blanket, the at least one flame retardant element partially covering the top side of the first fire blanket, such that a void is formed between the first fire blanket and the second fire blanket,

wherein the first lateral side of the first fire blanket and the first lateral side of the second fire blanket are affixed to a portion of the first surface of the first intumescent sheet and the second lateral side of the first fire blanket and the second lateral side of the second fire blanket are affixed to a portion of the first surface of the second intumescent sheet.

2. The fire barrier according to claim 1 , wherein at least one of the first and second fire blankets is surrounded by a metal foil.

3. The fire barrier according to claim 1 , further comprising a third fire blanket having a top side, a bottom side, a first lateral side, and a second lateral side.

4. The fire barrier according to claim 3 , wherein the third fire blanket comprises a ceramic fiber blanket surrounded with a metal foil.

5. The fire barrier according to claim 4 , wherein the third fire blanket comprises a ceramic fiber blanket surrounded with a metal foil.

6. The fire barrier according to claim 1 , further comprising a third fire blanket having a top side, a bottom side, a first lateral side and a second lateral side.

7. The fire barrier according to claim 1 , wherein at least one of the first and second fire blankets comprises alkaline earth silicate wool fibers, polycrystalline wool fibers, alumina magnesia silicate fibers, calcium silicate fibers, kaowool fibers, rockwool fibers, mineral wool fibers, slag wool fibers, stone wool fibers, silica fibers, or combinations thereof.

8. The fire barrier according to claim 7 , wherein the alkaline earth silicate wool fibers comprise magnesium silicate fibers, calcium magnesium silicate fibers and combinations thereof.

9. The fire barrier according to claim 7 , wherein the polycrystalline wool fibers comprise fibers comprising a mullite composition having greater than 70 weight percent silica and alumina.

10. The fire barrier according to claim 7 , wherein the polycrystalline wool fibers comprise high alumina polycrystalline wool fibers having greater than 90 weight percent alumina.

11. The fire barrier according to claim 7 , wherein the silica fibers greater than 90 weight percent silica.

12. The fire barrier according to claim 1 , wherein the flame retardant element comprises of ceramic fiber, mineral wool, rock wool, calcium silicate, sodium silicate, potassium silicate, magnesium oxide, intumescent material and silicone.

13. The fire barrier according to claim 12 , wherein the flame retardant element comprises of ceramic fiber.

14. The fire barrier according to claim 1 , wherein the at least one flame retardant element is disposed on the top side of the first fire blanket and also on the top side of the second fire blanket.

15. The fire barrier according to claim 1 , wherein the at least one flame retardant element is also disposed on the top side of the second fire blanket and the top side of a third fire blanket.

16. The fire barrier according to claim 1 , wherein a portion of the first surface of the first intumescent sheet extends longitudinally to form a first foldable splice, said first foldable splice is an integral part of the first intumescent sheet and covers a portion of area enclosed by the top sides and the first lateral sides of the first fire blanket, the second fire blanket and a third fire blanket.

17. The fire barrier according to claim 1 , further comprising a waterproof gutter, wherein the waterproof gutter comprises a bottom layer and two lateral sides, wherein the bottom layer comprises an outer surface and an inner surface, and wherein the outer surface of the bottom layer of the waterproof gutter is affixed to the top side of the first fire blanket or the top side of the second fire blanket or the top side of a third fire blanket.

18. The fire barrier according to claim 1 , further comprising a metal shroud covering a portion of the fire barrier, said metal shroud affixed to the second surfaces of the first intumescent sheet and the second intumescent sheet, independent of each other, with a fourth adhesive.

19. The fire barrier according to claim 18 , wherein the metal shroud comprises a stainless-steel mesh.

20. A method for installing an expansion joint fire barrier, comprising the steps of:

a. providing a first structure and a second structure spatially separated to form an expansion joint therebetween, and

b. affixing at least one fire barrier according to claim 1 into the expansion joint.

21. An expansion joint system comprising:

a first structure and a second structure spatially separated to form an expansion joint therebetween, and a fire barrier according to claim 1 ,

wherein the second surface of the first intumescent sheet is affixed to the first structure, and the second surface of the second intumescent sheet is affixed to the second structure.

22. A fire barrier assembly comprising:

at least one fire barrier according to claim 1 , and

at least one pressure sensitive adhesive that affixes the at least one fire barrier to the second surface of the first intumescent sheet and the second surface of the second intumescent sheet.