Demolition work means any work that involves the demolition or dismantling of a structure or part of a structure that is load-bearing or is related to the physical integrity of the structure.
It does not include:
- the dismantling of formwork, falsework, scaffolding or other structures designed or used to provide support, access or containment during construction work
- the removal of power, light or telecommunication poles.
PCBUs, employers and workers are to refer to the Demolition work - Code of Practice.
Notifiable of demolition work and approval to carry out certain demolition work
The person undertaking the demolition work must:
- hold a South Australian contractor’s licence issued by Consumer and Business Services for the type of demolition being undertaken; and
- must notify us at least 5 days before commencing demolition work if it involves:
- demolition of a structure, or part of a structure, that is load-bearing or otherwise related to the physical integrity of the structure, that is at least six metres in height
- load shifting machinery on a suspended floor
If it is proposed to use explosives on a demolition site, or demolish a building or structure using mechanical equipment that needs to be supported by any part of the building or structure, the demolition must not be commenced before a proposed demolition work plan has been submitted to SafeWork SA, and approval has been given to the commencement of the work. (SafeWork SA may attach conditions to any such approval).
Using explosives on a demolition site
Before deciding whether explosives should be used, a competent person experienced in the controlled application of explosives for the purpose of carrying out the demolition should be consulted. Explosives must only be used by a competent person who is licensed in the use of explosives and has experience in the type of work to be carried out. A licensed competent person must also develop and have authorised a blast management plan prior to the blast starting.
All possession, storage, transport, handling and use of explosives must be carried out in compliance with the Explosives Act 1936, and licences and permits may be required. See SafeWork SA’s Explosives licence webpage for more information.
At the time of notification, you will need to submit
- Licence details and experience of person who will be responsible for the explosives work
- The blast management plan
- Copies of the valid licence and permits which cover the purchase, import (if applicable) storage and transport of explosives.
It is advised that these licences and permits are in place prior to submitting the notification to SafeWork SA.
Demolish a building or structure using mechanical equipment
At time of notification, you will need to upload the:
- Demolition Work Plan and Structural engineer’s approval, which includes:
- the type, size, weight and usage of specified plant
- capability of the floor sustaining the static and live loads without excessive deformation or collapse
- design and spacing of propping
- Safe Work Method Statement for high risk construction work
Demolition work should be carefully planned. The best way to manage risks associated with demolition work is to carry out a risk assessment.
Identify any hazards associated with any demolition work:
- walk around the work area and look for hazards
- consult with your workers on any potential hazards of which they are aware
- check records of previous demolition injuries, including 'near miss' incidents.
You should also consult, co-ordinate and co-operate with any other duty holders if they are involved in the same activities or share the same workplace eg mobile plant operators, structural engineers or asbestos removalists.
Common demolition hazards include:
- electricity supply still being connected
- unplanned structure collapse
- falls from one level to another
- falling objects
- the location of above and underground essential services
- exposure to hazardous chemicals
- hazardous noise from plant and explosives used in demolition work
- proximity of the building or structure being demolished to other buildings or structures.
Assessing the risk
A risk assessment will help you to determine what control measures you need to implement. A risk assessment is compulsory when working with asbestos or explosives.
When assessing the risks associated with demolition work you should consider:
- the structure to be demolished and its structural integrity
- the method of demolition including its sequencing
- the scheduling of work
- the layout of the workplace
- what plant and equipment will be used and the skill and experience required by the people who will use it safely
- what exposures might occur
- the number of people involved
- local weather conditions.
Controlling the risks
The ways of controlling risks are ranked from the highest level of protection and reliability to the lowest. You must work through this hierarchy when managing risk.
The highest control measures involve eliminating hazards and the associated risks.
If it is not possible to eliminate the risk, then you must minimise the risk by using one of the following control measures, or a combination of control measures:
- substituting the hazard with something safe (eg using a mechanical demolition method rather than a manual method, if safe)
- isolating the hazard (eg using concrete barriers to separate pedestrians and powered mobile plant to reduce the risk of collision)
- using engineering controls (eg fitting an open cab excavator with a falling objects protective structure to minimise the risk of being struck by a falling object)
- using administrative controls (eg installing warning signs).
If there are any remaining risks then suitable personal protective equipment should be provided to workers, such as hard hats, steel cap boots and high visibility vests.
Regularly review all control measures in place to make sure they remain effective.