ASTM E119 Standard Test Methods for Fire Tests of Building Construction and Materials

Get Certified ASTM E119 for Reliable Fire Resistance Rating

Manufacturers and building product suppliers pursue ASTM E119 testing to confirm that a wall, floor, column, or beam assembly earns an accurate fire resistance rating for code compliance. Consistent furnace exposure and hose stream testing support defensible ratings across projects and jurisdictions. Matestlab supports manufacturers with calibrated furnace testing and experienced analysts who evaluate building assemblies under ASTM E119.

The scope of ASTM E119 includes:

• Material type: Load-bearing and non-load-bearing walls, partitions, columns, girders, beams, slabs, and composite slab and beam assemblies.
• Purpose: Determination of the duration a building assembly contains a fire, retains structural integrity, or both.
• Property evaluation: Fire containment, structural integrity, and unexposed-surface temperature rise during furnace exposure.
• Testing method: A furnace exposes the assembly to a standard time-temperature curve, and thermocouples track unexposed-surface temperature rise.
• Results: A time-based fire resistance rating, such as one hour or two hours, based on the assembly’s performance.
• Test limitation: Furnace exposure provides a relative measure of fire-test response rather than a prediction of every real-world fire condition.
• Use conditions: Wall assemblies undergo a standard fire hose stream exposure after the furnace phase, applied under Practice E2226.
• Application: Supports fire-rated egress paths, stairwells, elevator shafts, and mechanical room classifications in building codes.

What are the Uses of ASTM E119 Testing?

ASTM E119 testing allows manufacturers and designers to provide a verifiable fire resistance rating for a wall, floor, column, or beam assembly. Codes refer to these ratings to classify an assembly as an egress or life-safety feature. This standard-

• Assigns time-based fire resistance ratings such as one hour or two hours to building assemblies.
• Supports code compliance for fire-rated walls, floors, columns, and beams.
• Compares fire-test response across different assembly designs and materials.
• Verifies structural integrity under combined thermal and hose stream exposure.
• Assists manufacturers in developing and certifying fire-rated building products.
• Supports classification of egress paths, stairwells, and mechanical rooms in building codes.

Which materials can be tested under ASTM E119?

ASTM E119 applies to assemblies of masonry units and composite structural materials, including load-bearing and non-load-bearing walls and partitions, columns, girders, beams, slabs, and composite slab and beam assemblies for floors and roofs. The specimens of load-bearing walls and partitions shall have an area of at least 100 sq.ft. of exposed surface, no one of which shall be less than 9 ft. in either direction. The specimens of beams, for floors and roofs, shall have a width not exceeding 7 ft., measured from the center of the beam.

Why is ASTM E119 Important?

Fire resistance ratings are used to define life-safety requirements of building code related to exit access, stairwells, and fire barriers. Testing an assembly under different conditions may result in an assembly having a fire-test response that does not reflect its rating. Fire resistance ratings keep a standard for different manufacturers, laboratories, and jurisdictions based on the standards of ASTM E119, allowing for life-safety decisions to be made based on accurate information specific to jurisdiction and building type.

ASTM E119 Testing Process and Data Collection

A technician installs the full-scale assembly on the furnace and applies the design load where the assembly type requires it. The furnace exposes the specimen to a standard time-temperature curve, and thermocouples record the unexposed-surface temperature throughout the test. Technicians monitor the assembly for fire penetration and structural performance until failure occurs or the assembly completes the target exposure period. Analysts then apply the hose stream exposure to wall assemblies and compile the recorded data into the assembly’s fire resistance rating.

Common Challenges and Troubleshooting

One of the most frequent causes of error in fire resistance testing is inaccurate furnace temperature distribution, because a furnace that does not follow the standard time-temperature curve will give a rating that will not represent the true performance of the assembly. The errors in positioning the thermocouples on the unexposed side also affect the temperature rise measurement. Technicians correct these problems by recalibrating the furnace with the standard curve prior to the test, by positioning thermocouples based on the furnace assembly type, and by making sure that the specimen is built as per the assembly drawing before the exposure test starts.

• Laboratories report the fire resistance rating in hours, commonly one hour or two hours for standard wall and floor assemblies.
• Analysts report the unexposed-surface temperature rise, with 250 °F (139 °C) above the initial temperature marking a common failure threshold for protective membranes.
• Engineers document whether the assembly passed the hose stream exposure without developing an opening or sustained flaming on the unexposed surface.
• Laboratories record the furnace exposure duration alongside the assigned rating for code compliance documentation.
• Analysts note the specimen dimensions tested, since load-bearing wall specimens need a minimum 100 ft² exposed surface area under this method.

Link to ASTM E119