CSA S900.2:21

Preface This is the first edition of CSA S900.2, Structural design of wastewater treatment plants. This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group. Scope 1.1 This Standard provides requirements and guidance on the structural design of new wastewater treatment plants, including buildings and liquid-containing tanks, from the point effluent enters the plant to the point of its discharge. 1.2 This Standard is written in support of the design process provided by the National Building Code of Canada, but includes additional requirements specific to the design of wastewater treatment plants not covered under current NBCC and CSA standards. 1.3 This Standard covers the following materials: a) concrete; b) steel; c) masonry; d) fiberglass reinforced plastic (FRP); e) glass fiberglass reinforced polymer (GFRP); f) stainless steel; g) aluminum; and h) geo-membrane. 1.4 This Standard does not address the following: a) buried linear infrastructure; or b) water treatment plants and other water retaining structures. 1.5 In 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.