Understanding the Different Levels of Investigation: ASCE Texas Section Guidelines for Residential Foundations

When it comes to residential foundations, the integrity and stability of the structure are paramount. Evaluating and repairing foundations requires a methodical approach, and the American Society of Civil Engineers (ASCE), Texas Section, has defined specific levels of investigation to ensure thorough assessment. Here’s a breakdown of these levels as outlined in the ASCE Texas Section Guidelines for the Evaluation and Repair of Residential Foundations – Version 3 (Adopted March 2022).

Level A Investigation

The Level A investigation serves as a preliminary assessment or a “report of first impressions.” It generally includes:

  • Interviews with occupants, owners, and clients
  • Review of existing documents such as construction drawings and geotechnical reports
  • Visual observations and walk-through
  • Consideration of factors influencing foundation performance
  • A written report detailing observations, influential factors, conclusions, and recommendations for further action

Level B Investigation

A Level B investigation builds on Level A by adding detailed measurements and a scaled drawing of the foundation. It includes:

  • Relative Foundation Elevations: These determine the shape of the foundation or floor, considering floor finishes.
  • Scaled Drawing: Includes considerations for differing thicknesses of floor covering, built-in slopes, and deflection calculations.
  • Deflection and Tilt Reporting: This includes overall deflection, localized deflection, and tilt compared to acceptable tolerances.

Level C Investigation

The most comprehensive option, Level C, incorporates all aspects of Levels A and B and may include additional tests and reports as deemed necessary by the Engineer. This may include:

  • Site-specific soil sampling and testing
  • Plumbing and material testing
  • Steel reinforcing and post-tensioning cable testing
  • A detailed level of reporting that includes factors affecting soil moisture, tree surveys, photographs, and a detailed distress survey

Why Choose Oasis Engineering for Your Foundation Evaluations?

Understanding and applying these different levels of investigation require specialized knowledge and experience. Oasis Engineering offers expert services in guiding your residential foundation evaluations, tailoring the approach to match the specific requirements, guidance, and specifications of your project.

Our network of licensed professional engineers provides not just evaluations but comprehensive support to ensure that your foundation meets all safety and building standards. We understand the intricacies of the Texas residential construction landscape and have the proven expertise to ensure your project’s success.

Get in touch with us today to learn more about how we can assist with your foundation evaluation needs. Whether it’s a Level A, B, or C investigation, we’re here to provide the assurance, accuracy, and support you need. Don’t leave your foundation to chance; trust in the proven expertise of Oasis Engineering.

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