AASHTO T 177M/T 177 is the AASHTO standard method of test for the flexural strength of concrete using a simple beam with center-point loading. The AASHTO Materials Book (45th edition, July 2025) lists it as T 177M/T 177-17 (2025) in Part 2, Standard Methods of Test.
Labs use it when a concrete specification calls for flexural strength measured with a single load at mid-span of a simple beam. AASHTO publishes the third-point loading version as a separate method, T 97M/T 97, so confirm which designation and edition the project specification names before setting up the fixture and report.
The test is run in a compression or universal testing machine fitted with a flexure fixture for center-point loading of concrete beams. Our flexure fixtures for large and brittle specimens support flexural testing to AASHTO T 177M/T 177. If you need help matching AASHTO T 177M/T 177 requirements to your parts or setup, contact our team.
