Certification Performance Criteria Guidance B 1. 4 Use of Third Party Designed Details Option

On many construction projects the design and detailing of certain building components is undertaken by a specialist supplier or contractor some time after the design of the principal elements of structure has been completed. Examples of components which fall into this group include manufactured timber roof trusses, steelwork connections, piling, elements of the external envelope, balustrades, etc.The legislation allows a building warrant application to be progressed in 'stages' to allow work to start before the whole design is complete. This way the applicant submits the required information to the Verifier in stages. The warrant will be granted for the whole project with a condition that work on the later stages does not commence until the required information has been submitted and an amendment to the warrant has been granted.