These test methods cover procedures for the sampling and testing of brick and structural clay tile. Although not necessarily applicable to all types of units@ tests include modulus of rupture@ compressive strength@ absorption@ saturation coefficient@ effect of freezing and thawing@ efflorescence@ initial rate of absorption and determination of weight@ size@ warpage@ length change@ and void area. (Additional methods of test pertinent to ceramic glazed facing tile are included in Specification C126.) The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard. NOTE 1??The testing laboratory performing this test method should be evaluated in accordance with Practice C1093. The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 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. *A Summary of Changes section appears at the end of this standard.