Permit to Work Systems: What They Are and When You Need One

A Permit to Work (PTW) system is a formal written process used to control high-risk workplace activities. It ensures the job is clearly defined, hazards are assessed, and only authorised workers carry out the task.

When a PTW System Is Needed

Common activities requiring permits include:

• Hot work (welding, cutting, grinding)
• Working in confined spaces
• Electrical work
• Working at height
• Excavations
• Isolation of machinery

What a Permit Must Include

A good PTW sets out:

• Work description
• Hazards and controls
• Isolation requirements
• PPE
• Authorisation
• Time limits
• Handover and close-out

Why PTW Systems Matter

They reduce accidents, prevent miscommunication and provide a clear documented trail of safe work.