Document ID: chunk:federal_register_of_legislation:F2016L00410:body:0:p18
Version: federal_register_of_legislation:F2016L00410
Segment Type: other
Provision Reference: 
Character Range: 49809–52769

may require demolition in part or whole.
Any modification of a structure requires reapplication of the processes detailed in the design phases. Consultation with professional engineers or other experts may be necessary in order to assess the impact of any proposed modifications or changes in design, for example changes in the load spread across a building floor when heavy equipment is relocated, modified or replaced.

This ensures that any new hazards and risks are identified and controlled, and that the safety features already incorporated into the design are not affected. Additional design issues identified in these phases should be passed back to the designer.

4.5         Demolition and dismantling

Section 22: In relation to the proper demolition or disposal of a structure, designers also have
a duty to:
    * carry out, or arrange the carrying out of, any calculations, analysis, testing or examination that may be necessary for the structure to be without risks to health and safety, and
    * provide adequate information to each person who is provided with the design concerning any conditions necessary to ensure that the structure is without risks to health and safety.
This is particularly important with modern designs where 'limit state' design techniques are used by the structure designer. In this system, the designer considers the structure in its completed form with all the structural components, including bracing, installed. The completed structure can withstand much higher loads (for example, wind and other live loads) than when the structure is in the construction or demolition stage.

A structure should be designed to enable demolition using existing techniques. The designer should provide information so that potential demolishers can understand the structure, load paths and any features incorporated to assist demolition, as well as any features that require unusual demolition techniques or sequencing.

Designers of new structures are well placed to influence the ultimate demolition of a structure by designing-in facilities such as lifting lugs on beams or columns and protecting inserts in pre-cast panels so that they may be utilised for disassembly. Materials and finishes specified for the original structure may require special attention at the time of demolition and any special requirements for the disposal and/or recycling of those materials or finishes should be advised to the client through the risk assessment documentation.
Further guidance on the demolition of buildings and structures can be found in the Code of Practice: Demolition Work.

APPENDIX A – ROLES AND RESPONSIBILITIES
Some design tasks, although related, may be controlled by different parties due to contractual arrangements. For a traditional project delivery model — where the client directly engages a designer to undertake detailed design — the project safety decisions during the design stage are the result of collaboration