If a powder-actuated tool misfires, hold it firmly against the work surface for 30 seconds, then follow the manufacturer's instructions.
Key takeaways for powder-actuated tool misfire wait and edge distances before the next shot
- If the tool misfires, hold it firmly against the work surface for 30 seconds, then follow the manufacturer's instructions, as printed by the Washington State Legislature WAC 296-155-36313.
- The California Department of Industrial Relations prints the same 30-second hold in its operation section California Code of Regulations, Title 8, Section 1691. Operation..
- Before loading, confirm the operator carries a valid operator's card for the specific tools used, according to the California Department of Industrial Relations California Code of Regulations, Title 8, Section 1685. Operator and Instructor Qualifications..
- Check the edge distances before firing: fasteners must not be driven closer than 1/2 inch (13 mm) from the edge of steel, except for specific applications recommended by the tool manufacturer, according to the California Department of Industrial Relations California Code of Regulations, Title 8, Section 1690. Limitations of Use..
- Fasteners must not be driven closer than 3 inches (76 mm) from the unsupported edge of masonry materials, except for specific applications recommended by the tool manufacturer, according to the California Department of Industrial Relations California Code of Regulations, Title 8, Section 1690. Limitations of Use..
Write these numbers on the page that prints them.
How long to hold a powder tool after a misfire, in one paragraph
Keep the tool pressed against the surface during the full 30 seconds. Do not unload the tool before the 30 seconds are complete. The 30-second wait is the first required step after a misfire on both pages.
The misfire line California and Washington print
According to the Washington State Legislature, in the event of a misfire, the operator must hold the tool firmly against the work surface for a period of 30 seconds and then follow the explicit instructions set forth in the manufacturer's instructions.
California’s rule mirrors this requirement almost exactly. According to the California Department of Industrial Relations, in the event of a misfire, the operator must hold the tool firmly against the work surface for a period of 30 seconds and then follow the instructions set forth in the manufacturer's instructions. This line appears in California Code of Regulations, Title 8, Section 1691. Operation. Both pages specify the same duration and the same physical action: holding the tool firmly against the work surface. Neither page suggests a shorter or longer wait; the number is fixed at 30 seconds.
The immediate follow-up step on both pages is to follow the manufacturer's instructions. Washington’s page uses the phrase "explicit instructions set forth in the manufacturer's instructions," while California’s page uses "instructions set forth in the manufacturer's instructions." The slight variation in wording does not change the requirement. After the 30-second hold, the operator must consult the specific guidance provided by the tool’s manufacturer. This step is distinct from the initial hold. The hold is a fixed safety pause; the manufacturer’s instructions are a variable set of steps that depend on the specific tool model in use.
Who may operate the tool and what sign is posted
Before the crew loads the tool, verify that the person holding it has the specific training required for that exact model. The federal regulation states that only employees who have been trained in the operation of the particular tool in use shall be allowed to operate a powder-actuated tool, according to Legal Information Institute. This requirement ties the operator’s qualification directly to the specific equipment being handled on the site. Washington State Legislature adds a parallel requirement that only qualified operators must operate tools, according to Washington State Legislature. These rules ensure that the individual firing the tool has the specific competency for that device.
In California, the requirement is more specific regarding documentation. The employer shall ensure that only qualified persons who carry valid operator's cards for the tools used be permitted to operate powder-actuated tools, according to California Department of Industrial Relations. If the card does not match the tool, the operator is not qualified under this section. Check the card against the tool model before the first shot of the day. A related instruction page is New worker safety instruction record: 4 checks.
The warning sign is a separate requirement that must be visible to anyone entering the area. California Code of Regulations, Title 8, Section 1691. Operation. requires a sign at least 8 x 10 inches (20 x 25 cm), using boldface type no less than 1-inch (2.5 cm) in height, be conspicuously posted within 50 feet (15 m) of the area where the tools are being used, according to California Department of Industrial Relations. The sign must be in plain sight. Washington State Legislature requires you to post a sign, at least 20 x 25 cm (8 x 10 in), using boldface type no less than 2.5 cm (1 in) in height, in plain sight on all construction projects where tools are used, according to Washington State Legislature.
Place the sign so it is visible from the approach to the work area. If the sign is missing, or if the text is smaller than 1 inch in height, the site does not meet the posting requirement. The sign dimensions are 8 x 10 inches in California and 20 x 25 cm in Washington. The text height must be at least 1 inch or 2.5 cm. The sign must be within 50 feet (15 m) of the area where the tools are being used in California. In Washington, it must be in plain sight on the project.
A filled reference table of the powder-tool lines
The table below lists the specific misfire waits, operator qualifications, and edge or sign requirements printed on the regulatory pages for Washington and California.
| Publisher | Misfire wait it prints | Who may operate | Edge distance or sign it prints |
|---|---|---|---|
| Washington State Legislature | Hold the tool firmly against the work surface for 30 seconds | Only qualified operators | Post a sign at least 20 x 25 cm (8 x 10 in) in plain sight |
| California Department of Industrial Relations | Hold the tool firmly against the work surface for 30 seconds | qualified persons who carry valid operator's cards | Sign at least 8 x 10 inches (20 x 25 cm) within 50 feet (15 m); 1/2 inch (13 mm) from steel edge; 3 inches (76 mm) from masonry edge |
Edge distances and the unload-if-interrupted line
California Code of Regulations, Title 8, Section 1690. Limitations of Use sets the distance limits for powder-actuated tool fasteners. The regulation states that fasteners shall not be driven closer than 1/2 inch (13 mm) from the edge of steel, except for specific applications recommended by the tool manufacturer, according to California Department of Industrial Relations. This half-inch line applies specifically to steel edges. For masonry materials, the same section specifies that fasteners shall not be driven closer than 3 inches (76 mm) from the unsupported edge, except for specific applications recommended by the tool manufacturer, according to California Department of Industrial Relations. These are distinct limits: the steel edge limit is 1/2 inch, and the masonry edge limit is 3 inches. Do not apply the steel limit to masonry or the masonry limit to steel. Each number belongs to the material named in the quote.
The regulation also addresses what happens when work stops after the tool is loaded. Operation states that if the work is interrupted after loading, then the tool shall be unloaded immediately, according to California Department of Industrial Relations. This rule applies to interrupted work specifically. The instruction is immediate unloading, not a timed delay.
Before the tool is fired, the operator should confirm which material is being fastened and measure the distance to the nearest edge. If the edge is steel, the fastener must be at least 1/2 inch away, unless the tool manufacturer recommends a different application for that specific steel edge. If the edge is masonry, the fastener must be at least 3 inches from the unsupported edge, unless the tool manufacturer recommends a different application for that specific masonry edge. Write the measured edge distance on the job record before loading the tool. If the work is interrupted after loading, unload the tool immediately, as required by the California regulation. Keep the misfire line and the edge distance lines with the page that prints them.
Illustrative example of a misfire hold
This illustrative example uses round numbers only. The tool misfires against masonry. The operator holds it firmly against the work surface for 30 seconds, then follows the manufacturer's instructions. The fastener sits 3 inches from the unsupported masonry edge. A sign measuring 8 x 10 inches is posted 50 feet from the area where the tool is used.
What to confirm before the powder tool is loaded
Note the checks completed before the tool was loaded. The Legal Information Institute states that tools shall not be loaded until just prior to the intended firing time according to Legal Information Institute. This rule applies specifically to the source named in the link. You must write down the time you confirmed the tool was unloaded before the crew began their work. The same source adds that loaded tools shall not be left unattended according to Legal Information Institute. If you step away from a loaded tool, you must return immediately or unload it. Do not leave the tool in a state where it is loaded but no one is watching it. The Washington State Legislature requires that each day, prior to use, the operator must inspect the tool to determine that it is in proper working condition in accordance with the testing methods recommended by the manufacturer of the tool according to Washington State Legislature. Write the date and the name of the operator who performed this daily inspection. This inspection must happen before the tool is used that day. A related pre-start page is First-aid checks: 4 rules before the crew starts. Another pre-start page is Portable ladder checks: 4 steps before climbing.
One step to take before loading today
Before the tool is loaded today, confirm a valid operator's card for the tools used, measure the steel or masonry edge, and check that the warning sign is posted in plain sight.
FAQ about powder-actuated tools
How long to hold the tool after a misfire?
Hold the tool firmly against the work surface for 30 seconds, according to Washington State Legislature. California prints the same 30-second hold, according to California Department of Industrial Relations. After the 30 seconds, follow the manufacturer's instructions, according to Washington State Legislature. Do not shorten the hold or skip the manufacturer's steps.
Who may operate the tool?
Only qualified operators must operate tools, according to Washington State Legislature.
How close to a steel edge?
Fasteners shall not be driven closer than 1/2 inch (13 mm) from the edge of steel except for specific applications recommended by the tool manufacturer, according to California Department of Industrial Relations. Measure the distance from the fastener point to the steel edge before firing. If the tool manufacturer recommends a different distance for a specific application, follow that recommendation.
How close to a masonry edge?
Fasteners shall not be driven closer than 3 inches (76 mm) from the unsupported edge of masonry materials except for specific applications recommended by the tool manufacturer, according to California Department of Industrial Relations. Confirm the masonry edge is unsupported before applying the 3-inch limit.
What to write down today?
Record the operator's card number and the edge distance you will keep. Note the misfire line from the page that prints it. If the tool misfires, record the 30-second hold and the manufacturer's follow-up steps. This log helps you verify the operator card and edge distances for the next shot.