Fire Stop Systems Brochure SA727 - USG Corporation

Construction Joint Fire Tests
Static Joints
Fire Tests UL System Test Criteria Description
Floor Joint FF-S-0028 a
2
3
1
30 USG Fire Stop Systems
Assembly Rating
2 Hr.
L-Rating at Ambiant
Less than 1 cfm/lin. ft.
L-Rating at 400 °F
Less than 1 cfm/lin. ft.
1. Concrete floor assembly, minimum 4-1/2� thickness; maximum joint
width 2�.
2. Forming material: Minimum 4� of mineral wool insulation b (minimum
2.5 pcf) firmly packed into the opening as a permanent form.
3. Type A:
Minimum 1/2� wet thickness of sealant applied within the opening,
flush with the top surface of the floor
Head-of-Wall Joint System HW-S-0001a For fluted steel deck/concrete 1. Floor or roof assembly: Maximum 3� deep fluted deck with minimum
floor or roof/ceiling and gypsum 2-1/2� concrete floor or maximum 1-1/2� deep fluted roof deck per
wallboard wall UL Design.
2. Gypsum wallboard/stud wall assembly:
1-hr. or 2-hr. fire-rated wall.
3.
A
Joint treatment system:
Forming material:
Minimum 2-1/2� of mineral wool insulationb Assembly Rating
1 & 2 Hr.
Joint Width
1/2� Maximum
1 3A 3B 3A A 1 3A
(minimum 4.0 pcf) firmly
packed into the flutes of the steel deck as a permanent form.
A
3B
B Fill material: Type FC or RFC:
For 1-hr. rating, minimum 1/2� thick compound is applied on each
2
side of the wall; for 2-hr. rating, minimum 1� thick compound is
applied on each side of the wall.
Section A–A
Note
(a) Refer to the UL Fire Resistance Directory for Building Joint Systems or contact
United States Gypsum Company for complete information. (b) Bearing the UL
Classification Marking.