Fire rated building construction framing members
View Patent ↗Fire rated building construction framing members and related wall assemblies are disclosed that comprise a sheet metal framing member (all profiles) in combination with a new type of multi-layer fire safety/sound reduction tape. The multi-layer fire safety/sound reduction tape comprises a flexible thermal barrier layer attached to a flexible intumescent material layer. In combination, the thermal barrier layer comprises a thermoplastic material that is on a surface of the sheet metal framing member, whereas the thermal barrier layer is attached to the intumescent layer such that the thermal barrier layer is between the sheet metal framing member and the intumescent layer. The multi-layer fire safety/sound reduction tape slows and impedes the spread of fire and smoke (during a fire) and also reduces sound transmission between adjacent rooms in a building.
1. A sheet metal framing member in combination with a multi-layer fire safety pressure sensitive adhesive tape configured for use in a fire rate wall assembly, the multi-layer fire safety pressure sensitive adhesive tape comprising a flexible and conformable thermal barrier layer attached to a flexible intumescent material layer, wherein the thermal barrier layer comprises a thermoplastic material that is on a surface of the sheet metal framing member, and wherein the thermal barrier layer is attached to the intumescent layer such that the thermal barrier layer is between the sheet metal framing member and the intumescent layer, and wherein the thermoplastic material is a foamed thermoplastic that contains a plurality of closed cells, and wherein the thermal barrier layer and the intumescent layer (i) each have a uniform thickness that is about the same, and (ii) are stacked lengthwise to each other to yield the multi-layer fire safety pressure sensitive adhesive tape having a thickness equal to the combined thickness of the thermal barrier layer and the intumescent layer.
2. The sheet metal framing member of claim 1 wherein the intumescent layer is on the thermal barrier layer.
3. The sheet metal framing member of claim 1 wherein the thermoplastic is semi-crystalline.
4. The sheet metal framing member of claim 1 wherein the flexible thermal barrier layer has a thickness ranging from about 1.0 to about 2.0 millimeters.
5. The sheet metal framing member of claim 4 wherein the flexible thermal barrier layer contains a plurality of internal cells with diameters ranging from about 100 to about 1,000 microns.
6. The sheet metal framing member of claim 5 wherein the flexible intumescent material layer has a thickness ranging from about 1.0 to about 2.5 millimeter.