Confined Spaces

About this topic

A confined space is one of the most dangerous environments a construction worker can enter. People die in confined spaces every year, often while trying to rescue a workmate. The White Card (CPCWHS1001) makes sure you can recognise one and understand why you must never enter without the proper permit and training.

What is a confined space?

A confined space is an enclosed or partially enclosed space that is not designed for people to occupy, has restricted entry or exit, and may contain a harmful atmosphere or a risk of engulfment. Examples include tanks, pits, silos, sewers, pipes and some ductwork. It is defined by its risks, not just its size.

Why confined spaces are so dangerous

The biggest danger is the atmosphere. A confined space can hold toxic gases, or be oxygen-deficient, with no warning to your senses. You can be overcome in seconds. There is also the risk of engulfment by liquids or free-flowing solids like grain or sand.

Entry requirements

Entering a confined space is tightly controlled. It requires a confined space entry permit, atmospheric testing before and during entry, workers trained specifically in confined space work, a standby person stationed outside, and a rescue plan. A White Card on its own does not qualify you to enter, you need additional, specific training (work in this area is guided by AS 2865).

Key facts to remember

• A confined space is not designed for occupancy and may have a harmful atmosphere or engulfment risk.
• The air can be toxic or oxygen-deficient with no warning, this is the main killer.
• Entry needs a confined space entry permit and atmospheric testing.
• A trained standby person must remain outside with a rescue plan.
• A White Card alone does not qualify you, specific confined space training is required.

Frequently asked questions

What is a confined space?
An enclosed or partially enclosed space not designed for people to occupy, with restricted entry, that may contain a harmful atmosphere or a risk of engulfment, such as a tank, pit, silo or sewer.

Can I enter a confined space with just a White Card?
No. A White Card does not qualify you to enter a confined space. You need specific confined space training, an entry permit, atmospheric testing and a standby person.

What is a confined space entry permit?
A formal document that authorises entry after the risks have been assessed and controls (testing, ventilation, standby person, rescue plan) are in place.

Why are confined spaces so deadly?
Because the atmosphere can be toxic or lack oxygen with no warning, overcoming a worker in seconds. Many deaths are would-be rescuers who entered without protection.

Sample exam questions

Try these example questions, then practise the full set with our free quiz.

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