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https://www.nist.gov/el/fire-research-division-73300/national-fire-research-laboratory-73306/influence-fire-lateral-0

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# Influence of Fire on the Lateral Resistance of Cold-Formed Steel Shear Walls – Phase 2

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This study extends the Phase 1 project to experimentally investigate the performance of common lateral force-resisting systems (LFRS) used in cold-formed steel (CFS) construction under sequential thermal (fire) and mechanical (earthquake) loading. Wall specimens with gypsum-sheet steel composite sheathing, oriented strand board (OSB) sheathing, or steel strap bracing are tested. The tests provide data for a range of system performance under realistic fire conditions and can inform: fire compartmentation design when significant lateral deformation of the building is anticipated, post-fire assessment to repair or replace a structure, and first responder decisions to enter a building when earthquake aftershocks are likely.

Twenty-two 2.7 m by 3.7 m shear wall specimens consisting of 150 mm wide CFS framing were tested.  All walls were designed to achieve a 1-hour fire-resistance rating per American Society for Testing and Materials (ASTM) standard E119. Heating was applied to the side of the wall opposite to the side where the shear-resisting elements are located; it is assumed that the shear-resisting elements line an egress corridor and the fire occurs in a room adjacent to the corridor.  The walls are designed using Allowable Stress Design nominally following American Iron and Steel Institute (AISI) standards S400-15/S1-16 and AISI S100-16.

### **DATA**

*Influence of Fire on the Lateral Resistance of Cold-Formed Steel Shear Walls - Phase 2*

Spreadsheets containing the data from the experiments can be downloaded here (click link).

In each spreadsheet, the worksheet titled 'Scaled Data' contains the data used to produce the figures and tables in the test report. The other worksheets provide information about the setup of the data acquisition system and sensor location drawings.

Information about the test program as well as sensor types, naming and uncertainties can be found in the test report .

### **VIDEO GALLERY**

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Kitchen stove camera)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Kitchen front view)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Kitchen wall view)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Kitchen doorway view)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Kitchen doorway view - Real Time)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Specimen SB01)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Specimen SB02)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Specimen SB03)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Specimen SB03R)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Specimen SB04)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Specimen OSB01)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Specimen OSB01NG)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Specimen OSB01R)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Specimen OSB02)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Specimen OSB03)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Specimen OSB03R)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Specimen OSB04)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Specimen OSB05)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Specimen OSB06)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Specimen S01)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Specimen S01R)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Specimen S02)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Specimen S03)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Specimen S04)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Specimen S05)

Cold-Formed Steel Shear Wall Structure-Fire Interaction (Specimen S06)

### **RELATED PUBLICATIONS**

                  - Hoehler, M. S.; Andres. B.; Bundy, M.  Lateral Resistance Reduction to Cold-Formed Steel-Framed Shear Walls under Various Fire Scenarios , ASCE J. of Structural Engineering, 146(5), 2020.
                  - Andres. B.; Hoehler, M. S.; Bundy, M.  Fire Resistance of Cold-Formed Steel Framed Shear Walls under Various Fire Scenarios , Fire and Materials, 44(3), 2019.
                  - Hoehler, M. S.; Andres. B.; Bundy, M.:  Influence of Fire on the Lateral Resistance of Cold-Formed Steel Shear Walls – Phase 2: Oriented Strand Board, Strap Braced, and Gypsum-Sheet Steel Composite , Technical Note (NIST TN) - 2038, 2019, pp 296.
                  - Hoehler, M. S.; Andres, B.  Influence of Fire on the Shear Capacity of Cold-Formed Steel Framed Shear Walls , Wei-Wen Yu International Specialty Conference on Cold-Formed Steel Structures, November 7-8, 2018, St. Louis, MO.
                  - Andres, B.; Hoehler, M. S.  Influence of Fire on the Seismic Shear Capacity of Cold-Formed Steel Shear Walls , 11th U.S. National Conference on Earthquake Engineering, June 25-29, 2018, Los Angeles, USA.
                  - Hoehler, M. S.; Andres, B.  Influence of Fire on the Shear Capacity of Steel-Sheathed Cold-Formed Steel Framed Shear Walls , SiF18 - The 10th International Conference on Structures in Fire, June 6-8, 2018, Blefast, UK.

## Contacts

                -  Matthew Hoehler  matthew.hoehler@nist.gov      (301) 975-8517   

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