前言:前言这是CSA S349的第一版，金属板连接木桁架制造商的认证要求。范围:1.1本标准规定了制造金属板连接木桁架的设施的最低认证要求，这些桁架的设计符合CSA O86和TPIC，以符合行业标准。1.2在本标准中，“应”用于表示要求，即用户为遵守本标准而有义务满足的规定；“应该”用于表示建议或建议但不需要的建议；“可”用于表示一个选项或在标准范围内允许的选项。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。1.3国际单位制给出的数值为本标准中的记录单位。括号中给出的值仅供参考和比较。508/CSA C22。2号14。

Preface:Preface This is the first edition of CSA S349,Certification requirements for manufacturers of metal-plate-connected wood trusses.Scope:1.1This Standard specifies the minimum certification requirements for facilities engaged in the manufacture of metal-plate-connected wood trusses designed in accordance with CSA O86 and TPIC in order to conform with industry standards.1.2In this Standard, "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; and "may" is used to express an option or that which is permissible within the limits of the Standard. 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.1.3The values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.508/CSA C22.2 No. 14.