前言:这是CSA S269的第二版。1、脚手架和模板。它取代了1975年出版的题为“用于建筑目的的作业”的前一版。以下是与本标准前一版相比的重大变化:a）现在包括了极限状态设计（LSD）的规定，同时保留了许用应力设计（ASD）的规定，从而让设计师选择最合适的方法。纳入LSD要求的目的是至少与现有ASD要求一样安全。b） 本标准结合了之前的CSA S269。1（处理脚手架）和CSA S269。3（模板处理）整合为一个标准，以消除冗余，提高用户可读性。c） 增加了关于专用模板和脚手架的章节。d） 增加了关于胶合板的新附录A。e） 更新了范围、定义、参考标准、设计、图纸、现场活动、测试、图表和表格。 这些更新将使该标准更为现行，并与其他类似文件兼容。范围:本标准规定了脚手架和模板材料、组件和系统的设计、制造、安装、检查、测试、维护和使用的规则和要求，其中脚手架和模板材料、组件和系统的安装是为了在建筑和其他结构的施工、改造或维修期间为新浇筑的混凝土提供临时垂直和横向支撑或防护，还包括重新铺设尚未达到全部强度的新板系统。本标准还包括外围外壳系统的设计。注:1）对于暴露在异常环境或特征下的异常类型脚手架或模板，可能需要补充规则或要求；b） 使用本标准未涵盖的材料或程序； andc）可多次用于预制应用。2） 类似的材料可在AS 3600、AS 3610、BS 5975和BS EN 12812.1.2中找到。本标准的结构和组织使其可用于工作应力或极限状态设计标准和概念。1.3本标准不适用于悬挂式脚手架或摇摆台；b） 卡车或车载平台；c） 进入脚手架；d） 混凝土结构设计；e） 烟囱跳跃形式；（f）拆除。1.4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。1.5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。

Preface:This is the second edition of CSA S269.1,Falsework and formwork. It supersedes the previous edition published in 1975 under the titleFalsework for Construction Purposes.The following are the significant changes from the previous edition of this Standard:a) Provisions are now included for limit states design (LSD) while keeping provisions for allowable stress design (ASD), thereby letting the designer choose the method most appropriate. The aim in including LSD requirements is to be at least as safe as the existing ASD requirements.b) This Standard combines the previous CSA S269.1 (dealing with falsework) and CSA S269.3 (dealing with formwork) into one Standard to eliminate redundancy and improve user readability.c) A section on specialized formwork and falsework has been added.d) A new Annex A on plywood has been added.e) Updates have been made to scope, definitions, reference Standards, design, drawings, site activities, testing, figures, and tables. The updates will make this Standard more current and compatible with other similar documents.Scope:This Standard provides rules and requirements for the design, fabrication, erection, inspection, testing, maintenance, and use of falsework and formwork materials, components, and systems where they are erected to provide temporary vertical and lateral support or containment of freshly placed concrete for buildings and other structures during their construction, alteration, or repair, and includes the reshore of new slab systems that have not achieved full strength. This Standard also covers the design of perimeter enclosure systems.Notes :1)Supplementary rules or requirements may be necessary for unusual types of falsework or formwork thata)are exposed to unusual environments or features;b)employ materials or procedures not covered in this Standard; andc)are intended to be used many times for precasting applications.2)Similar material can be found in AS 3600, AS 3610, BS 5975, and BS EN 12812.1.2This Standard is structured and organized so that it may be used with either working stress or limit states design standards and concepts.1.3This Standard does not apply toa) suspended scaffolds or swing stages;b) truck or vehicle mounted platforms;c) access scaffolds;d) design of concrete structures;e) chimney jump forms; andf) demolition.1.4In 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.1.5The 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.