CSA Group Frames and Covers for Maintenance Holes and Catchbasins CAN/CSA-B70.1-03 (R2017)

Scope 1.1 General This Standard applies to frames and covers for maintenance holes and catch basins. 1.2 In 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; 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. Legends to equations and figures are considered requirements.