SLAC National Accelerator Laboratory
Environment, Safety & Health Division
Machine and Portable Tools | Portable Tool Requirements
21 November 2022
SLAC-I-730-0A21S-027-R004
10 of 15
2.6.2.3
Guarding
Hand-held pneumatically powered
tools used for driving nails, staples and similar fasteners that operate at
100 psig or more line pressure must have a safety device at the muzzle to prevent the tool from discharging
until the muzzle is in contact with a solid surface.
2.6.2.4
Powering On and Off
Disconnect pneumatic nailers and staplers at the tool from the air supply when not in use.
2.6.2.5
Personal Protective Equipment
Always wear a securely fastened safety belt and lanyard when using pneumatic nailers and staplers on
steep roofs (1:3 pitch or greater).
2.6.3 Portable Compressors
Wheels must be fixed, locked, or blocked to prevent rolling.
Fans must be guarded with a shroud or side screens.
Air tanks must be drained of liquid according to the manufacturer’s specifications.
Air receivers must comply with state regulations (
8 CCR 461–466
).
2.7 Powder-actuated Tools
Powder-actuated tools operate like a loaded gun and should be treated
with the same respect and
precautions. All powder-actuated tools must comply with
ANSI A10.3
), or have a California approval
number.
1
(If the tool manufacturer cannot say it meets the ANSI standard then it can request approval for
the tool from the California Division of Occupational Safety and Health.)
Powder-actuated tools used in industrial operations must be designed, constructed, operated, and
maintained in compliance with
8 CCR 1684–1692
.
2.7.1 Use
Only workers who have been trained in the operation of the particular tool in use are allowed to
operate a powder-actuated tool. Training must be provided by someone with both
sufficient knowledge
regarding the tool and sufficient training ability to successfully convey the information to the worker.
The training should include review of the instruction manual for each specific make and model of
powder-actuated tool.
All tools must be tested according to the manufacturer’s recommendations before loading to see that
the safety devices are working properly. If the tool develops a defect during use it should be tagged
and taken out of service immediately until it is properly repaired.
Inspect the tool before use to determine that it is clean, that all moving parts operate freely, and that the
barrel is free from obstructions.
1 Title 8,
California Code of Regulations
, “Industrial Relations”, Division 1, “Department of Industrial
Relations”, Chapter 4, “Division of Industrial Safety”, Subchapter 4, “Construction Safety Orders”,
Article 27, “Powder-actuated Tools”, Section 1684, “Tool Design Requirements” (
8 CCR 1684
)
SLAC National Accelerator Laboratory
Environment, Safety & Health Division
Machine and Portable Tools | Portable Tool Requirements
21 November 2022
SLAC-I-730-0A21S-027-R004
11 of 15
Do not point tools, whether loaded or empty, at any person.
Keep hands clear of the barrel end.
Bystanders are not permitted near the work. Shields for protecting workers against a possible ricochet
may be necessary in the working area.
Warning signs must be conspicuously posted within 50 feet of the area where powder-actuated tools
are being used and be removed promptly when no longer applicable.
Do not use tools in explosive or flammable atmospheres.
Adequate ventilation must be provided in confined spaces where powder-actuated tools are used.
Be careful when using tools near live electrical circuits and make sure that projectiles do not enter live
circuits buried or hidden in the base material.
Use tools at right angles to the work surface.
Make sure the base material has no holes or openings and is of sufficient consistency
to prevent a
projectile from passing right through.
Do not force a projectile into a working surface that is harder than the projectile being used. If the base
material is unknown, use a hand hammer to drive the projectile, using it as a drift punch.
2.7.2 Switches and Controls
To prevent the tool from firing accidentally, two separate motions are required for firing: one to bring
the tool into position, and another to pull the trigger. The tools must not be able to operate until they
are pressed against the work surface with a force of at least five pounds greater than the total weight of
the tool.
All tools must be designed for varying powder charges so that the user can
select a powder level
necessary to do the work without excessive force.
2.7.3 Guarding
All tools must be used with the correct shield, guard, or attachment supplied by the manufacturer. The
muzzle end of the tool must have a protective shield or guard centered perpendicularly on the barrel to
confine any flying fragments or particles that might otherwise create a hazard when the tool is fired.
The tool must be designed so that it will not fire unless it has this kind of safety device.
2.7.4 Powering On and Off
Do not load until immediately before the intended firing time, and do
not leave loaded tools
unattended.
2.7.5 Cleaning and Maintenance
Store tools and cartridges when not in use in lockable containers and that have required warning labels
on the inside and outside of the container.
Unload tools before storing.
Clean and maintain tools according to manufacturers' instructions.
SLAC National Accelerator Laboratory
Environment, Safety & Health Division
Machine and Portable Tools | Portable Tool Requirements
21 November 2022
SLAC-I-730-0A21S-027-R004
12 of 15
2.7.6 Personal Protective Equipment
Personal protective equipment will be used: safety glasses or a
face shield, hearing protection, and a
hard hat.
2.7.7 Cartridges
Use only cartridges recommended by the tool manufacturer.
Check the color of the cartridge to make sure it is appropriate for work being done. Charge cartridges
are color-coded to show their strength.
Check cartridges by conducting a first trial using the weakest or lowest strength charge cartridge.
Cartridges must not be carried loose or in a pocket, but in the manufacturer’s package.
Do not force cartridges into a tool.
Keep cartridges in a lock up when not in use.
Do not discard unfired cartridges carelessly.
2.7.7.1
Misfires
If a powder-actuated tool misfires:
1.
Wait at least 30 seconds then try firing it again.
2.
If it still will not fire, wait another 30 seconds so that the faulty cartridge is less likely to explode, then
carefully remove the load.
3.
Place the bad cartridge in a bucket of water.
4.
Notify your supervisor that a misfire has occurred.
5.
Contact Waste Management (WM) for assistance in disposing of the misfired cartridge.
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