8 references
Design Requirements & Compliance
8Code and authority requirements that set the design envelope.
WSA 02 Gravity Sewerage CodeWhat the code covers, and how it relates to authority supplements.Local Water Authority RequirementsSupplements, standard drawings and asset standards that modify the code.Minimum and Maximum Pipe GradesHow grade is set between self-cleansing and velocity limits.Minimum Cover RequirementsCover to the pipe crown, and what drives the minimum.Pipe Sizing and Capacity CriteriaSelecting a diameter against design flow, depth and grade.Self-Cleansing RequirementsVelocity and shear stress criteria, and which flow condition to check.Maintenance Hole Spacing and LocationsWhere access is mandatory, and what sets the maximum spacing.Clearances to Other ServicesSeparations, crossings and the alternatives where space is tight.
These references summarise Australian engineering practice and point to the source documents. They do not replace WSA 02, the current Australian Standards or the local water authority's requirements, and no clause numbers or compliance limits are reproduced. Project-specific requirements and current standard editions must be checked before use in design.