1.1 This test method covers the determination of the compressive properties of resin-matrix composites reinforced by oriented continuous high-modulus 21 GPa (3 X 106 psi) fibers. This includes only the following: 1.1.1 Unidirectional-Continuous reinforcing fibers, 0 and 90(degree) properties. 1.2 The values stated in inch-pound units are to be regarded as the standard. The SI units may be approximate. 1.3 This standard does not purport to address all of the safety problems, 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.