Patent ID: 8074412

Claim:
A means for preventing fire and noise from passing a top edge of a wall via flutes in a fluted ceiling comprising: a unitary element having a first edge that is a top edge when the element is in use and which has a plurality of flutes separated by lands, and a bottom edge which is channel shaped; the ceiling having a plurality of flutes and a plurality of lands located between adjacent flutes with the flutes of the element being sized and located to snugly accommodate the lands of the ceiling and the lands of the element being sized and shaped to snugly accommodate the flutes of the ceiling, the channel shape of the element being sized to snugly accommodate a wallboard adjacent to a top edge of the wall board to snugly fix the element to the wallboard, the element including a first layer of fire resistant material and a second layer of fire resistant material sandwiched between two layers of steel, said layers of the element being held together by a plurality of fasteners.