First, describe the work and worksite
A framer will fasten supported wood wall components at a ground-level assembly station with a pneumatic nailer using a full sequential trigger. A helper stages material outside the discharge path. This fictional learning example records planned controls; it supplies no actual inspections or work authorization.
- The exact nailer, trigger, fastener and air-supply instructions are available.
- Workpieces are supported and the fastening station can be separated from other workers.
- This excludes elevated fastening, powder-actuated tools and contact-trigger bump firing.
Questions before work
- Which trigger and fasteners are installed on this nailer?
- How are hands and the helper kept out of the penetration path?
- How is air disconnected before a jam, adjustment or movement requiring disconnection?
Build the analysis one step at a time
What will the worker do? How could someone be harmed? What prevents or reduces that exposure? Who checks the control, and when?
1. Plan the fastening position
Hazard: A nail can penetrate the workpiece or deflect into a hand or another worker.
Control: Support the workpiece and identify the discharge and penetration paths. Arrange clamping or support that keeps hands clear and keep the helper away from the firing area.
Verification: Operator checks both sides of the intended fastening point.
Why this belongs in the analysis: The far side of the workpiece matters.
2. Inspect the nailer and trigger
Hazard: A damaged tool or defeated contact safety can discharge unexpectedly.
Control: Use the specified full sequential trigger and intact safety devices. Inspect the actual tool and remove defective equipment from service; never bypass the contact mechanism.
Verification: Operator follows the manufacturer’s safe pre-use check without pointing at anyone.
Why this belongs in the analysis: Trigger selection changes the unintended-discharge risk.
3. Connect and route the air supply
Hazard: A hose can whip, disconnect or trip workers.
Control: Use compatible rated connections and the required securement. Set the pressure within the tool instructions and route the hose outside access and sharp edges.
Verification: Operator checks the connection and supply setting before use.
Why this belongs in the analysis: The supply system belongs in the tool analysis.
4. Fasten from a stable position
Hazard: Double firing, ricochet or penetration can cause puncture injuries.
Control: Use the full sequential firing sequence with the workpiece supported. Keep the muzzle away from people, hands out of the path and the finger off the trigger while carrying or repositioning.
Verification: Operator confirms position and clearance before each fastening run.
Why this belongs in the analysis: Gloves cannot prevent a nail from penetrating a hand.
5. Clear a jam or change fasteners
Hazard: Stored air and a loaded nail can discharge during handling.
Control: Disconnect the air and follow the tool’s jam-clearing and loading instructions before reaching into the mechanism. Do not pry a jam while connected.
Verification: Operator verifies the specified disconnected safe state before opening the tool.
Why this belongs in the analysis: A stopped firing sequence is not energy isolation.
6. Secure the tool and address an injury
Hazard: An unattended connected nailer can discharge; a puncture can hide serious internal injury.
Control: Disconnect and store the tool safely. Report injuries and close calls and obtain appropriate medical assessment for a nail puncture under the emergency plan; do not treat it as a routine splinter.
Verification: Lead checks tool storage and confirms crew knows the medical contact and location.
Why this belongs in the analysis: Closeout includes the next person who may handle the tool.
What does a useful control look like?
| Needs improvement | More useful for this scenario |
|---|---|
| Be careful around the equipment. | Use compatible rated connections and the required securement. Set the pressure within the tool instructions and route the hose outside access and sharp edges. |
| Check the area before starting. | Support the workpiece and identify the discharge and penetration paths. Arrange clamping or support that keeps hands clear and keep the helper away from the firing area. |
Decisions that change the analysis
Is full sequential triggering a substitute for work-position controls?
No. It reduces unintended firing compared with contact triggering, but penetration, ricochet and unsafe hand placement remain. Keep the supported-workpiece and discharge-path controls.
What must be recorded before this example is used on a job?
Replace the scenario with the actual work, identify additional hazards with the crew, and record the applicable instructions, responsible people, inspection findings, unresolved actions and required authorization. A planned verification is not an inspection result.
Agree when the crew will pause
- Trigger, fasteners or material changes.
- Safety device fails, a jam occurs or hose damage appears.
- The work moves to an exposed edge or the helper enters the discharge path.
After a pause, correct the condition, reassess the work, and obtain required authorization before restarting. Keep unresolved actions visible.
Download the worked example and free template
No account or paid membership required. The worked example contains planned controls. The blank template is for your own work; neither includes fabricated inspection results, signatures or approval.
Your editable working copy
Build and download your draft
Start blank or load the learning example. Replace its assumptions with your actual conditions and involve the people doing the work. Your entries stay in this browser tab; download a copy before leaving or refreshing.
1. Describe your work and site
2. Work through each task
Describe an observable step, how someone could be harmed, and the control that acts on that hazard. Identify who checks it and what evidence is needed.
3. Record changes, checks, and open actions
Walk the work area, review with the crew, and resolve missing controls. Follow the required approval process. This tool does not judge completeness, verify signatures or authorize work.
Open the downloaded file in a browser, then use Print → Save as PDF for a printable copy.
Training needs to confirm
- Actual trigger sequence, air disconnection and safe jam clearing.
- Puncture prevention and prompt injury reporting and response.
Confirm applicable qualifications, task instruction and actual training evidence for the people assigned. Related toolbox talks support crew discussion; they do not establish competence.
Common questions
Can this be used as a JSA?
Use the Task | Hazard | Control structure if it meets the employer’s format. Adapt the boundaries, controls, verification and records to the actual job.
Does this provide a completed USACE AHA?
No. Use the project’s required AHA process, risk method, supporting fields and acceptance requirements. The existing formwork AHA explains the additional structure.
Are these resources part of a paid course?
This walkthrough, browser draft builder and downloads are free public resources, separate from Academy course enrollment.
References and source note
- OSHA and NIOSH Nail Gun Safety guide
- OSHA 1926.302 Power operated hand tools
- OSHA 1926.300 Hand and power tools
- OSHA 1926.21 Safety training and education
Original worked example developed for the stated scenario. Primary references support the planning framework; the actual equipment manual, product instructions and project design must supply applicable operating and acceptance criteria. Use actual equipment instructions and site requirements alongside these references. Reference review: October 9, 2026.