Unit of competency Outline

Date retreived
22/07/2026 11:46 AM AWST

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Design and size roof drainage systems

Design and size roof drainage systems

Unit of competency
National Code
CPCPRF4011
State Code
OCM87
TGA Status
Current
DTWD Status
Approved
Current Release Number
1.00
Current Release Date
27/11/2020
View on TGA
State Implementation and Classification
Approved Date
01/06/2021
Field of Education
040327 - Plumbing
Original Release Date
01/06/2021
Nominal Hours
36
Description
This unit specifies the skills and knowledge required to design, size and document the layout of roof drainage systems for Class 1 and 6 buildings as defined in the National Construction Code (NCC).In some jurisdictions, this unit of competency may form part of accreditation, licensing, legislative, regulatory or certification requirements.
Notes
Elements and Performance Criteria
1 Identify roof drainage system requirements.
  • 1.1 Access, read and determine design and size of roof drainage system from plans, job specifications, relevant Australian Standards, codes, manufacturers’ instructions and jurisdictional requirements.
  • 1.2 Identify and apply workplace, work health and safety (WHS) and environmental requirements.
2 Design and size system layout.
  • 2.1 Design and size system layout in accordance with relevant manufacturers’ instructions, Australian Standards and jurisdictional requirements.
  • 2.2 Determine roof catchment areas and design flows from rainfall data and current Australian standards.
  • 2.3 Determine quantity and size of gutters, sumps, rain heads, overflows and downpipes.
  • 2.4 Produce final roof drainage system layout plans according to relevant drawing design standards.
No information
No information
Replaces
State Code National Code Title Type
WF956 CPCPRF4011B Design and size roof drainage systems Unit of competency
State Code National Code Title Type
BGC7 CPC40920 Certificate IV in Plumbing and Services Qualification
BGD0 CPC32620 Certificate III in Roof Plumbing Qualification