Principal contractor

The model work health and safety regulations set this up in a way that surprises people. For a construction project, the person conducting a business or undertaking that commissions the work is the principal contractor by default.

That default can be shifted. If the commissioning business engages another business as principal contractor and authorises it to have management or control of the workplace, the engaged business takes the role. A project can only have one principal contractor at any one time.

The practical consequence is that a landowner or developer who engages trades directly, without appointing a head contractor as principal contractor in writing, is the principal contractor and carries those duties personally. This catches owner builders, developers running trades directly, and clients who split a project into separate packages to save a margin.

A construction project means construction work where the cost of the work is $250,000 or more. Below that figure the general duties still apply to everyone involved, but the specific principal contractor duties are not triggered.

The duties attach to the role and are additional to the general duties the business already holds as a person conducting a business or undertaking.

The WHS management plan. Prepare a written plan for the project before work starts, keep it current, and make sure anyone doing construction work on the project knows what is in it.

Safe work method statements. Obtain the SWMS for high risk construction work before that work starts, and make arrangements to assess, monitor and review them, rather than collecting them into a folder.

Signs and identification. Display signage at the workplace identifying the principal contractor, with contact details, so that the responsible party is visible from outside the site.

Site security. Put in place measures to keep unauthorised people out of the workplace, including outside working hours.

Amenities and facilities. Provide the facilities required for the people working on the project.

Induction and information. Make sure workers receive the information, training and instruction they need for the site, which in practice means the site induction and the arrangements for keeping people informed when things change.

Consultation and coordination. Consult, cooperate and coordinate with the other businesses on the project, which is the duty that actually drives the interface management between trades.

Four similar terms are in daily use on Australian projects and they mean different things. Mixing them up in correspondence causes genuine confusion about who is responsible for what.

Principal contractor. A work health and safety role, defined by the regulations, attaching to the business with management or control of a construction project. There is one, and it carries the duties above.

Head contractor. A commercial description, meaning the contractor that holds the head contract with the client and subcontracts the trades. Usually the same business as the principal contractor, but the term comes from the contract rather than from the legislation.

Principal. In contract language this normally means the client, the party commissioning and paying for the work. So the principal and the principal contractor are usually opposite sides of the head contract, which is an unfortunate piece of naming.

PCBU. A person conducting a business or undertaking, the broad category that captures every business on the site. The principal contractor is a PCBU with extra duties, and so is every subcontractor, without those extra duties.

When writing, name the party rather than relying on the label, particularly where a document will be read by lawyers or a regulator later.

Assuming the appointment happened. If the client has not engaged a principal contractor in writing and authorised it to have management or control of the workplace, the client is still holding the role. The appointment belongs in the contract, not in an assumption.

Splitting a site between two principal contractors. There can only be one at a time. Where two builders work on one site, the arrangement has to define who holds the role and over what, and when it hands over.

Treating the $250,000 threshold as a safety threshold. Below it, the general duties still apply in full. What changes is the set of additional principal contractor obligations, not whether safety is managed.

Collecting SWMS without assessing them. The duty is to obtain and then arrange for them to be assessed, monitored and reviewed. A drawer of unreviewed SWMS demonstrates the opposite of compliance.

A plan that nobody has been told about. The duty includes making sure workers are aware of the content of the WHS management plan, so it belongs in the induction and in the briefings when it changes.

Forgetting the role runs to practical completion and beyond. Defects work, late trades and after hours access are all still the principal contractor's workplace.