The Definition of Powder-Actuated Tool Safety

Definition of Powder-Actuated Tool Safety

Powder-actuated tools (PATs) use the force of a blank cartridge, similar to a firearm round, to drive pins and fasteners into concrete, masonry and steel. Powder-actuated tool safety covers the operator training, tool inspection, load selection and work practices needed to prevent the serious injuries these tools can cause, including fastener penetration, ricochet, eye injuries, hearing damage and accidental discharge.

In construction, OSHA 29 CFR 1926.302(e) sets the rules for these tools. Only trained employees may operate them, tools must be tested each day before loading, and loaded tools must never be left unattended or pointed at anyone.

Key Facts About Powder-Actuated Tool Safety

• Most modern PATs are low-velocity tools, where a piston, not the gas, drives the fastener.
• Cartridge strength is color-coded; operators start with the weakest load that sets the fastener.
• Fasteners must not be driven into very hard or brittle materials, such as cast iron or glazed tile, or into easily penetrated materials where they could pass through.
• Tools must not be used in explosive or flammable atmospheres.
• Operators and nearby workers need eye and face protection and hearing protection.

Example of Powder-Actuated Tool Safety

A drywall crew uses a PAT to attach track to a concrete slab. Before starting, the trained operator checks the tool's function with it unloaded, confirms the slab is thick enough, selects a brown, low-power load for a test shot and makes sure nobody is working on the floor below.

How to Use Powder-Actuated Tools Safely

1. Ensure only trained, and where required licensed or certified, operators use the tool.
2. Inspect and test the tool daily, and tag out defective tools.
3. Check the work surface and what's behind it before firing.
4. Use the lowest power load that does the job, and keep the tool square to the surface.
5. Load just before firing, never leave a loaded tool unattended, and handle misfires per the manufacturer's instructions.

Related Terms

• Eye Protection
• Noise-Induced Hearing Loss (NIHL)
• Nail Gun Safety
• Defective Equipment
• Jobsite Safety

Frequently Asked Questions: Powder-Actuated Tool Safety

Do you need a license to use a powder-actuated tool?

OSHA requires training, and some states and manufacturers issue operator cards after training. Many contractors require a card before anyone uses the tool.

What should you do if a powder-actuated tool misfires?

Hold the tool against the work surface for the time the manufacturer specifies, then follow the manual's procedure for removing the cartridge. Place misfired cartridges in water or a designated container.

How is a powder-actuated tool different from a nail gun?

Nail guns use air or electricity to drive nails into softer materials. Powder-actuated tools use an explosive charge and are designed for concrete and steel.