Abstract: A fire stop assembly for bordering a conduit access through a building separation, includes a rigid body portion with an access opening with the access opening being adjustably closed to define a conduit fitting opening within the access opening. The remainder of the access opening is adjustably closed by a fire block arrangement comprising a lining of intumescent material on opposite sides of a conduit fitting opening and a series of non intumescent flame retardant members cooperating with the lining of intumescent material to close the remainder of said access opening. Preferably the non-intumescent flame retardant members are a series of plastic sleeves filled with mineral wool or other suitable insulation material. The sleeves and fill material are removable to adjust the opening size. The sleeves serve to protect the insulation material during the normal life of the fire stop assembly until a fire condition occurs.

Abstract: A fire barrier component has an outer sleeve retaining and protecting a fire stop material therein which is preferably compressed. The outer sleeve when exposed to a fire condition partially fails and the fire stop material forms the fire stop barrier. The fire stop material if compressed expands and can cooperate with adjacent components to form an effective fire stop barrier. The firestop barrier component can be factory made and used in complete fire barrier systems, or the component can be used as part of a specific field application. The component may be sold in longer lengths and cut as required to meet a particular application. Conventional saws work satisfactorily in cutting of the component while maintaining the performance of the component when exposed to a fire condition.

Abstract: A fire stop assembly for bordering a conduit access through a building separation, includes a rigid body portion with an access opening with the access opening being adjustably closed to define a conduit fitting opening within the access opening. The remainder of the access opening is adjustably closed by a fire block arrangement comprising a lining of intumescent material on opposite sides of a conduit fitting opening and a series of non intumescent flame retardant members cooperating with the lining of intumescent material to close the remainder of said access opening. Preferably the non-intumescent flame retardant members are a series of plastic sleeves filled with mineral wool or other suitable insulation material. The sleeves and fill material are removable to adjust the opening size. The sleeves serve to protect the insulation material during the normal life of the fire stop assembly until a fire condition occurs.