Division 7 Ebook Page 572 Steel Stud Structural Fire Resistance ASTM E119 Tech Bulletin

Technical Bulletin SS-03 ENCLOSURE SOLUTIONS Technical Bulletin SS-03 Structural Fire Resistance ASTM E119 Types of Construction and Fire Resistance Ratings The International Building Code 2 (IBC), Section 602, identifies building construction classifications. Some classifications require exterior wall fire resistance ratings of 1, 2 or 3 hours depending on building characteristics, including use and occupancy classification, height and area, fire separation distances, and other details. Testing Fire Resistance Ratings IBC Section 703 specifies that the fire resistance rating of building walls be determined in accordance with one of several alternative methods including ASTM E119 testing or engineering analysis (Section 703.3.4). ASTM E119 ASTM E119, Standard Test Methods for Fire Tests of Building Construction and Materials 1 , evaluates the duration for which building elements such as the Owens Corning Enclosure Solutions Wall Systems will contain a fire and retain its structural integrity during a fire test exposure. The test exposes a wall assembly to a controlled time/temperature fire exposure for a specified time period. The timed fire exposure is followed by the application of a fire hose stream to evaluate the ability of the fire weakened assembly to withstand both the thermal shock of a sudden cold water stream, and its retained structural integrity. The test standard measures the transmission of heat and hot gases through the wall assembly. For load bearing walls the standard also measures the load carrying ability of the wall assembly during the test exposure. Owens Corning Enclosure Solutions Fire Resistance Rating The Owens Corning Enclosure Steel Stud Wall Assembly is fire resistance rated for interior fire exposure for one and three hours, depending on the components used, on the type of interior gypsum board installed, and if it is load bearing or non-bearing. It is rated for a one hour exterior exposure. See Table 1 for additional details. Some system assemblies and descriptions are also available in the Underwriters Laboratories OnLine Certifications Directory. See the live links provided in Table 1 for complete details. Table 1: CMU (Multi-Wythe Masonry Cavity Wall, and Single Wythe CMU) Fire Resistance Rated Wall System Summary Component Design Options via Third Party Engineering Analysis* UL Assembly V414 UL Assembly V434 UL Assembly W429 Interior fire Rating (Structural) 3 hour (Non-Bearing) 3 hour 1 hour 3 hour (Non-Bearing) 1 hour (Bearing) Non-Bearing Bearing or Non-Bearing 1 hour (Bearing) Steel Stud, Bearing C-shaped, min. 3-1/2 deep, fabricated from No. 20 MSG (0.0329 in., min bare steel thickness) corrosion resistant steel. Studs shall be designed in accordance with the current edition of the Specification for the Design of Cold-Formed Steel Structural Members by the American Iron and Steel Institute. All design details enhancing the structural integrity of the wall assembly, including the axial design load of the studs, shall be as specified by the steel stud designer and/or producer and shall meet the requirements of all applicable local code agencies. The max stud spacing shall not exceed 24 in. OC. Studs attached to the floor and ceiling runners with in. long Type S12 pan head or 58 in. long Type S-12 low profile head, self-drilling, self-tapping steel screws on both sides of the studs. N/A C-shaped, min. 3-1/2 deep, fabricated from No. 20 MSG (0.0329 in., min bare steel thickness) corrosion resistant steel. Studs shall be designed in accordance with the current edition of the Specification for the Design of Cold-Formed Steel Structural Members by the American Iron and Steel Institute. All design details enhancing the structural integrity of the wall assembly, including the axial design load of the studs, shall be as specified by the steel stud designer and/or producer and shall meet the requirements of all applicable local code agencies. The max stud spacing shall not exceed 24 in. OC. Studs attached to the floor and ceiling runners with in. long Type S12 pan head or 58 in. long Type S-12 low profile head, self-drilling, self-tapping steel screws on both sides of the studs. C-shaped, min. 3-1/2 deep, fabricated from No. 20 MSG (0.0329 in., min bare steel thickness) corrosion resistant steel. Studs shall be designed in accordance with the current edition of the Specification for the Design of Cold-Formed Steel Structural Members by the American Iron and Steel Institute. All design details enhancing the structural integrity of the wall assembly, including the axial design load of the studs, shall be as specified by the steel stud designer and/or producer and shall meet the requirements of all applicable local code agencies. The max stud spacing shall not exceed 24 in. OC. Studs attached to the floor and ceiling runners with in. long Type S12 pan head or 58 in. long Type S-12 low profile head, self-drilling, self- tapping steel screws on both sides of the studs.

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