Patent ID: 8082715

Claim:
A fire barrier system, comprising: a bottom mount fire barrier/retainer system affixable to underside surfaces of preexisting spaced opposing building units forming an expansion joint space, comprising: a fire barrier having a length having a top surface and a bottom surface, a first long side, a second long side, and a middle section draped there between and, fire resistant metal retainers comprising, a first retainer flange ( 54 ) having a top surface and a bottom surface directly on said top surface of said first long side of the barrier providing for said top surface of said first flange to be attached to the pre-existing underside surface of one building unit; a second retainer flange ( 54 ) having a top surface and a bottom surface directly on said top surface of said second long side of the barrier providing for said top surface of said first flange to be attached to the pre-existing underside surface of the opposing building unit; an integral third retainer flange ( 55 ) directly on an adjacent section of said to surface of said first long side of a layer of said fire barrier; an integral fourth retainer flange ( 55 ) directly on an adjacent section of said top surface of said second long side of said layer of said fire barrier, and attachment devices ( 160 ) to be inserted into said bottom surface of said fire barrier to penetrate through said fire barrier and said flanges attaching said fire barrier/retainer system to the underside surfaces of the spaced opposing pre-existing building units, protecting said flanges from fire occurring below said building units.