Fire-rated joint system
A fire-rated angle piece and wall assemblies or other assemblies that incorporate the fire-rated angle piece, in which the angle piece can include an intumescent or other fire-resistant material strip. The angle can be attached adjacent to a corner of a framing member, such as metal tracks, headers, header tracks, sill plates, bottom tracks, metal studs, wood studs or wall partitions, and placed between the framing member and a wall board member at a perimeter of a wall assembly to create a fire block arrangement. A fire spray material can be applied over a portion of the angle piece.
1. A fire-rated wall joint product, comprising:
an elongated, generally L-shaped angle piece comprising a first flange and a second flange oriented at an angle relative to the first flange, the first flange and the second flange each having a free edge and being connected to one another along an edge that is opposite the free edges thereby defining a corner, the first flange and second flange formed from a single piece of material; and
an intumescent material strip applied to an interior surface of the second flange, wherein a height of the intumescent material strip is equal to or less than about one-half a height of the second flange, wherein the intumescent material strip is spaced from an upper end of the second flange.
2. The fire-rated wall joint product of claim 1 , wherein the height of the intumescent material strip is equal to or less than about one-third of the height of the second flange.
3. The fire-rated wall joint product of claim 1 , wherein the height of the intumescent material strip is about one-seventh of the height of the second flange.
4. The fire-rated wall joint product of claim 1 , wherein a distance between the upper end of the second flange and the intumescent material strip is one-half the height of the intumescent strip.
5. The fire-rated wall joint product of claim 4 , wherein a distance between the free edge of the second flange and the intumescent material strip is twice the height of the intumescent strip.
6. The fire-rated wall joint product of claim 1 , wherein the second flange is planar.
7. A fire-rated wall joint product, comprising:
an elongated, generally L-shaped anile piece comprising a first flange and a second flange oriented at an angle relative to the first flange, the first flange and the second flange each having a free edge and being connected to one another along an edge that is opposite the free edges thereby defining a corner, the first flange and second flange formed from a stele piece of material; and
a first intumescent material strip applied to an interior surface of the second flange, wherein a height of the intumescent material strip is equal to or less than about one-half a height of the second flange; and
a second intumescent material strip applied to the fire-rated wall joint product.
8. The fire-rated wall joint product of claim 7 , wherein the second intumescent material strip is located on the first flange.
9. The fire-rated wall joint product of claim 8 , wherein the second intumescent material strip is located on an exterior surface of the first flange.
10. The fire-rated wall joint product of claim 9 , wherein the first flange comprises a recess and the second intumescent material strip is located in the recess.
11. The fire-rated wall joint product of claim 1 , wherein the intumescent material strip is either intumescent tape or intumescent spray.
12. A fire-rated wall joint product, comprising:
an elongated, generally L-shaped angle piece comprising a first flange and a second flange oriented at an angle relative to the first flange, the first flange and the second flange each having a free edge and being connected to one another along an edge that is opposite the free edges thereby defining a corner, the first flange and the second flange each being planar along an entire distance between the corner and the respective free edge, the first and second flange being formed from a single piece of material; and
an intumescent material applied to an interior surface of the second flange, wherein the intumescent material is spaced from an upper end of the second flange.