This test method covers determination of the flexural strength of concrete by the use of a simple beam with third-point loading. The values stated in SI units are to be regarded as the standard. Note 1??For methods of molding concrete specimens@ see T 23 and R 39. This standard does not purport to address all of the safety concerns@ if any@ associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.