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https://www.nist.gov/el/fire-research-division-73300/national-fire-research-laboratory-73306/steel-concrete-composite-1

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Engineering LaboratoryFire Research Division

## National Fire Research Laboratory

-  Steel-Concrete Composite Floor Systems Subject to Fire – Phase 2  Expand or Collapse    -  Steel-Concrete Composite Floor Systems Subject to Fire – Phase 2 (Test #1) 
  -  Steel-Concrete Composite Floor Systems Subject to Fire – Phase 2 (Test #2) 

# Steel-Concrete Composite Floor Systems Subject to Fire – Phase 2 (Test #1)

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This first experiment was conducted on November 14, 2019 to quantify the performance the 9.1 m x 6.1 m composite floor specimen designed to achieve a 2-hour fire-resistance rating to generate baseline data for current U.S. practice. The fire test bay was situated on the ground floor in the middle edge bay of the test building, and the composite floor specimen had the minimum steel reinforcement (6x6 W1.4xW1.4 mesh mat with the distributed area of 60 mm2/m) prescribed for concrete crack control in normal conditions and permitted in standard furnace testing. This specimen was not subjected to controlled cooling nor mechanical loading during the cooling phase of a test fire. 
project website

### **DATA**

Spreadsheets containing the Test #1 data can be downloaded here (click link).

### Video Gallery 

Fire Resilience of a Full-Scale Steel-Concrete Composite Floor System with 2-Hour Fire-Resistance Designed using U.S. Prescriptive Approach - Isometric View from Front

project website

Fire Resilience of a Full-Scale Steel-Concrete Composite Floor System with 2-Hour Fire-Resistance Designed using U.S. Prescriptive Approach - Isometric View from West

project website

Fire Resilience of a Full-Scale Steel-Concrete Composite Floor System with 2-Hour Fire-Resistance Designed Using U.S. Prescriptive Approach - Top of Slab East View

project website

Fire Resilience of a Full-Scale Steel-Concrete Composite Floor System with 2-Hour Fire-Resistance Designed Using U.S. Prescriptive Approach - Top of Slab Center View

project website

Fire Resilience of a Full-Scale Steel-Concrete Composite Floor System with 2-Hour Fire-Resistance Designed using U.S. Prescriptive Approach - FLIR with Data Overlay

project website

Fire Resilience of a Full-Scale Steel-Concrete Composite Floor System with 2-Hour Fire-Resistance Designed Using U.S. Prescriptive Approach - Interior Window Camera

project website

Fire Resilience of a Full-Scale Steel-Concrete Composite Floor System with 2-Hour Fire-Resistance Designed using U.S. Prescriptive Approach - Interior Water Camera

project website

### RELATED PUBLICATIONS

                  - Choe, L.Y.; Ramesh, S.; Dai, X.; Hoehler, M.S.; Bundy. M.F.:  Experimental study on fire resistance of a full-scale composite floor assembly in a two-story steel framed building , Journal of Structural Fire Engineering, 2021.
                  - Choe, L.Y., Ramesh, S., Dai, X., Hoehler, M.S., Bundy, M.F., Bryant, R., Story, B., Chakalis, A.; Chernovsky, A.:  Fire Resilience of a Steel-Concrete Composite Floor System:  Full-Scale Experimental Evaluation for U.S. Prescriptive Approach with a 2-Hour Fire-Resistance Rating (Test #1) , NIST Technical Note 2165, 2021, pgs. 176.

FireStructural fire resistanceInfrastructureResilience

## Contacts

-  **‹** Steel-Concrete Composite Floor Systems Subject to Fire – Phase 2 
-  Steel-Concrete Composite Floor Systems Subject to Fire – Phase 2 (Test #2) **›** 

### HEADQUARTERS

301-975-2000

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