序言这是CSA O118的第二版。2、东部白雪松木瓦。它取代了1981年出版的前一版，并取代了CSA O118。2-M1981，东部白雪松木瓦。1.范围1。1本标准适用于由东方白雪松（Thuja occidentalis L.）制成的木瓦。它规定了最低等级、制造、包装、标签和合格评定要求。注:第三方检验和认证机构使用的建议合格评定程序见附录A，木瓦（包括重新连接的木瓦）使用建议见附录B。1.2除非另有说明，本标准中规定的尺寸适用于干燥前的木瓦。 1.3本标准不适用于作为垫片重新制造的木瓦。1.4本标准为制造标准，不适用于已安装的木瓦。1.5如果本标准提及“铰链”，除非上下文另有说明，否则该术语还包括重新连接的重新连接的木瓦。1.6在CSA标准中，“应”用于表示要求，即用户有义务满足的条款，以符合标准；“应该”用于表示建议或建议但不需要的建议；“可”用于表示一种选择或在标准范围内允许的选择； “can”用来表示可能性或能力。注释随附条款不包括要求或替代要求；随附条款的注释的目的是将解释性或信息性材料与文本分开。表和图的注释被视为表或图的一部分，可以作为要求编写。附件被指定为规范性（强制性）或信息性（非强制性）以定义其应用。1.7以SI（公制）单位给出的数值为标准值。括号中给出的值仅供参考。

PrefaceThis is the second edition of CSA O118.2, Eastern white cedar shingles. It supersedes the previous edition published in 1981 and replaces CSA O118.2-M1981, Eastern White Cedar Shingles.1 Scope1.1This Standard applies to shingles manufactured from eastern white cedar (Thuja occidentalis L.). It specifies minimum grading, manufacturing, packaging, labelling, and conformity assessment requirements. Note: See Annex A for a suggested conformity assessment program for use by third-party inspection and certification agencies and Annex B for recommendations on the use of shingles (including rebutted-rejointed shingles).1.2The sizes specified in this Standard are for shingles before drying unless otherwise indicated.1.3This Standard does not apply to shingles that have been remanufactured as shims.1.4This Standard is a manufacturing Standard and does not apply to installed shingles.1.5Where this Standard refers to "hingles" the terminology is also intended to include rebutted-rejointed shingles unless the context indicates otherwise.1.6In CSA Standards, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; "should" is used to express a recommendation or that which is advised but not required; "may" is used to express an option or that which is permissible within the limits of the standard; and "can" is used to express possibility or capability. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.1.7The values given in SI (metric) units are the standard. The values given in parentheses are for information only.