1.1 本试验方法包括测定平矩形墙面和地砖的楔形或矩形偏差。试验方法包括术语中定义的瓷砖 C242型 . 1.2 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 ====意义和用途====== 4.1 瓷砖通常压在具有真正90°角结构的模具中。然而，模具填充、压实压力和热处理的微小变化可能会导致成品瓷砖具有锐角和钝角。 这种不垂直会导致相对边的长度不同，瓷砖可能具有梯形或楔形外观。 4.2 过度楔入会给瓷砖的安装带来困难。本试验方法提供了一种确定楔入程度的方法。

1.1 This test method covers the determination of the wedging or deviation from rectangularity of flat, rectangular wall and floor tile. The test method covers tile as defined in Terminology C242 . 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 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. ====== Significance And Use ====== 4.1 Tile are normally pressed in dies having true 90° angle construction. However, minor variations in die fill, compacting pressure, and heat treatment can result in finished tile with acute and obtuse angles. This out-of-squareness results in a difference in length of opposite sides, and the tile may have the appearance of a keystone or wedge. 4.2 Excessive wedging presents difficulties in the installation of tile. This test method provides a means for determining the degree of wedging.