Los Angeles Fire Damage Concrete Structural Assessment & Testing
Fire damage to a residential or commercial building may cause unseen structural problems. The intense heat of fire leaves a catastrophic wake of visible damage. However, where structures are partially damaged, there may be an opportunity to repair buildings and salvage masonry walls and concrete slabs. A structural fire damage assessment is the method used to determine if a structure is repairable.
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Updated Requirements for Reusing Fire-Damaged Foundations in Los Angeles County
In 2025, Los Angeles County updated its guidelines for evaluating the reuse of existing foundation systems following a fire. These standards now require destructive testing—such as compressive strength testing and petrography—to determine whether fire-exposed concrete can safely support new construction. In our experience, non-destructive methods like the Schmidt Hammer test (ASTM C805) are not being considered sufficient.
Core Compressive Strength Testing Standards
- ASTM C42: Core extraction and evaluation
- ASTM C39 or C496: Compressive strength testing
Petrography Analysis of Concrete Microstructure
- ASTM C1314: CMU Prism Testing
Fire-Damage Structural Assessment: What to Expect & Sample Pricing
Step 1: Structural Inspection
Performed by a licensed structural engineer.
- Site visual inspection of fire-damaged foundation
- Development of a tailored materials testing plan
- Review of all testing results
- Summary report for permitting or design use
Price Estimate - $1,200
Step 2: Structural Investigation
Actual cost depends on foundation size & complexity. Higher ranges (up to $12K–$15K) may apply for larger or heavily damaged structures.
Compressive Strength Testing
- GPR scan to avoid reinforcement steel
- Core drilling (3 samples)
- Lab testing for ASTM C42/C39 compliance
- Repair core holes with non-shrink grout
Rebar Tensile Strength Testing
- GPR scan for rebar location
- Extract & test 3 rebar samples
- Repair rebar using couplers + grout
- (Additional steps may be required per engineer’s plan)
Price Estimate - $5,495
Deliverables
- All test reports and photo documentation
- Certification from a licensed lab
- Summary report for city submission
How does fire cause concrete & masonry damage?
importance of testing fire-damaged concrete
- Determines the compressive strength of concrete
- Ensures structural integrity of existing slabs and masonry
- Required for building and construction permits
- Comply with Los Angeles City Building Codes
Fire Damage Assessment
our concrete fire damage testing process
The goal of post-fire concrete testing is to determine the compressive strength of concrete after exposure to extreme temperatures. To determine this, an in-place core is precisely extracted from affected areas. The specific core size enables the use of specialized laboratory equipment which will be used to expose the concrete core to high pressure, measuring its resistance to force. Ultimately, the test will determine if the concrete has the strength to be used for reconstruction or must be replaced or repaired. Although classified as a destructive test, the building is not permanently damaged and at the completion of the test the core hole is filled.
The general process involves scanning the slab using ground penetrating radar to ensure that post tension cable or reinforcement steel is not damaged during the core drilling process. Once a safe location is found, a specialized drill with a 4″ inner diameter diamond drill bit is used to drill into the damaged concrete and extract cores.
The cores are coded and logged and then returned to our testing lab in Sante Fe Springs, California. There, the cores are placed into a specialized and certified hydraulic press capable of applying measurable pressure to the core sample.
The samples are exposed to the pressure of the press and the results are recorded. After completing the tests, a comprehensive report is generated listing the physical properties of the core and the concrete’s suitability for bearing construction loads.
LOS ANGELES COUNTY PUBLIC WORKS BUILDING AND SAFETY DIVISION CHECKLIST FOR REUSE OF EXISTING FOUNDATION
Our Certifications and accreditations
Why choose Specialized Testing for your Los Angeles Fire Damage Concrete Structural Assessment?
We have the experience, Qualification and Expertise to handle your Next Project
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About specialized testing
Your source for Material Testing, Concrete testing, Concrete X-Ray / GPR Scanning, Field Testing, & Product Qualification testing.
For over 30 years Specialized Testing has been providing nation-wide product certification testing and throughout California and the Southwest, Concrete Testing and X-Ray Scanning Services. Our primary mission is to ensure the safety of and integrity of job sites and products throughout the US.
For over 3 decades we have served thousands of customers and offered reliable services and the highest quality results.
Specialized Testing is a full-service lab specializing in the testing of rebar, concrete and masonry materials. We provide services to engineers, inspectors, and construction professionals. Located in the City of Santa Fe Springs we are an approved testing facility by the ACI (American Concrete Institute) and the City of Los Angeles. Serving Los Angeles County, Orange County, San Bernardino, and Riverside County we are committed to providing our services in a timely and professional manner. We pick up all sample specimens within 48-hours of notification and aim to provide lab results within three days of initial test.