JHA / JSA / AHA builderWalk Behind Power Trowel Operation JHA
A JHA breaks the work into steps, hazards and controls. Use this example to build a draft for your actual job and review it with your crew.
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Step 1 of 4 · Working draft
Your job
Tell Jenkins what you’re planning and where the work will happen. Use the actual job details.
Use the published example’s suggestions when they fit your task, or write your own steps. These are planned controls, not verified worksite conditions.
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.
Walk through the plan with the people doing the work. Resolve missing controls and agree who checks them. Moving to the next step does not approve the work.
Confirm people, equipment and emergency arrangements
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.
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Your Walk Behind Power Trowel Operation JHA
Walk through the job in order. Use these possible hazards, planned controls and checks to start a conversation about your actual work.
011. Accept the finishing area
Possible hazards: An unready slab, opening or crossing worker can cause loss of control or a fall.
Planned controls: Foreperson obtains the placing crew’s handover, protects openings and establishes a machine zone with a clear operator route. Hold machine access until the slab and route suit the equipment.
Check before work: Foreperson and operator walk the route before bringing the trowel into the zone.
022. Move and position the stopped machine
Possible hazards: Awkward handling or an unexpected start can strain workers or expose them to rotating parts.
Planned controls: Use the unit’s specified handling method with assistance or suitable handling equipment. Stop and secure the engine before movement; keep people outside pinch points.
Check before work: Operator checks the handling instructions and confirms the machine remains stopped during positioning.
033. Inspect the machine and release control
Possible hazards: Missing guards or a defeated operator release control can permit blade contact or an uncontrolled machine.
Planned controls: Trained operator checks guarding, blade attachment and controls using the model instructions. The manually guided powered trowel must shut off power when hands leave its handles; remove a defective unit from service.
Check before work: Operator completes the manufacturer’s safe control check without reaching into the rotating zone and records defects.
044. Make the finishing passes
Possible hazards: The rotating machine can pull, strike or trap the operator; wet cement contact and noise can injure workers.
Planned controls: Operator follows the unit’s starting and guiding method, keeps the helper outside its travel path and uses assessed skin, eye, foot and hearing protection. Keep exhaust out of occupied areas. Stop for loss of footing or unusual response.
Check before work: Crew confirms stop communication and separation; operator watches footing and machine response throughout each pass.
055. Stop for adjustment or cleaning
Possible hazards: Stored rotation and unintended starting can cause severe contact injury.
Planned controls: Stop, wait for motion to cease and control hazardous energy under the applicable concrete equipment and manufacturer procedure before blade adjustment or servicing. Never bypass the release control.
Check before work: Authorized person verifies the required safe state before entering the guarded area.
066. Refuel and hand over
Possible hazards: Hot surfaces, fuel spills or an unsecured machine can create fire or trip hazards for the next crew.
Planned controls: Refuel only after shutdown and cooling as instructed in the designated location. Collect residue, park the machine securely and identify unfinished edges or restricted areas to the receiving crew.
Check before work: Foreperson checks the machine parking location and finishing area at handover.
Example scope and starting conditions
A finishing crew will use a manually guided gasoline powered trowel on a new outdoor slab on grade after the placing crew hands over the area. The operator works inside a separated finishing zone with a designated helper. This fictional learning example records planned controls; it supplies no actual inspections or work authorization.
- Open air slab with a released machine route and protected openings; no occupied enclosure or suspended slab.
- Concrete readiness, machine configuration and access must suit the actual unit and finishing method.
- This example excludes ride on machines, lifting the trowel, concrete placement and cosmetic sack and patch repairs.
Know when to pause
- Operator release control fails or guarding is damaged.
- The job moves indoors or exhaust can reach occupied space.
- Slab support, footing, machine response or nearby work changes.
After a pause, correct the condition, reassess the work, and obtain required authorization before restarting.
Free example and template
No account required. The worked example contains planned controls. The blank template is for your own work; neither includes fabricated inspection results, signatures or approval.
Worked exampleNeed help? Ask Jenkins
Jenkins · Your Safety Concierge
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Jenkins matches your words to published starting points. Keep names and private job details in your working draft. Suitable free resources come first.
For managers
Does the team have what it needs to carry out the plan? Give the crew time, equipment and support, and make it clear who will resolve anything that is missing.
Manager checks and supporting resources
Confirm the people doing the work have the time, equipment, information and support to carry out the plan. Agree who checks the controls and who resolves open actions.
Questions to resolve before work
- Which machine, guard, blades and operator release control will be used?
- Who releases the slab for machine access and maintains the finishing boundary?
- Could exhaust reach an enclosure, occupied doorway or air intake?
Training and qualifications to confirm
- Machine familiarization and demonstrated control of the actual unit.
- Wet cement contact, noise and exhaust hazard instruction.
Confirm the actual training evidence for the assigned people. A toolbox talk does not establish competence.
Decisions that change the plan
Can this example be used for a ride on trowel?
No. Ride on controls, access, handling and emergency actions differ. Develop that machine’s analysis from its instructions rather than copying the manually guided release-control method.
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.
Keep planning connected
Resources that support this JHA
Additional tools for task planning and safe work. Start with the free resources; explore paid options only when they meet an additional need.
Toolbox talks for the work
Prepare a practical crew discussion.
Powered Tools: Check the Tool, Guard and Accessory →Wet Concrete: Prevent Skin and Eye Contact →Carbon Monoxide: Keep Exhaust Out of the Work →
Safety program resources
Review procedures, roles, and requirements.
Browse the existing catalog and confirm the scope and purchase availability of each program.
Browse safety programs →
Paid service · Availability
Task-specific training and qualifications
Explore applicable training and qualification needs.
Task-specific training services are not currently available to book here. Start with the free training-needs lookup; a toolbox talk or online course alone does not establish competence or employer authorization.
Review training needs · Free →People, equipment, emergency arrangements and open actions are recorded in the guided JHA’s Crew review step.
Open the crew review step →For safety professionals
How do we know the planning process and controls are working? Connect what the crew reports with field checks, risk decisions and the evidence behind your system.
Industry context, SIF, control verification and AHA review
Guidance and evidence
Review the method, risk decisions and evidence behind the plan. Use the actual jurisdiction, equipment instructions, employer process and project requirements.
Task-by-task control and verification rationale
1. Accept the finishing area
Hazard: An unready slab, opening or crossing worker can cause loss of control or a fall.
Control: Foreperson obtains the placing crew’s handover, protects openings and establishes a machine zone with a clear operator route. Hold machine access until the slab and route suit the equipment.
Verification: Foreperson and operator walk the route before bringing the trowel into the zone.
Why this belongs in the analysis: A placing handover does not automatically release every finishing machine.
2. Move and position the stopped machine
Hazard: Awkward handling or an unexpected start can strain workers or expose them to rotating parts.
Control: Use the unit’s specified handling method with assistance or suitable handling equipment. Stop and secure the engine before movement; keep people outside pinch points.
Verification: Operator checks the handling instructions and confirms the machine remains stopped during positioning.
Why this belongs in the analysis: The transport task has different exposures from troweling.
3. Inspect the machine and release control
Hazard: Missing guards or a defeated operator release control can permit blade contact or an uncontrolled machine.
Control: Trained operator checks guarding, blade attachment and controls using the model instructions. The manually guided powered trowel must shut off power when hands leave its handles; remove a defective unit from service.
Verification: Operator completes the manufacturer’s safe control check without reaching into the rotating zone and records defects.
Why this belongs in the analysis: The release control must function; a visible handle alone proves nothing.
4. Make the finishing passes
Hazard: The rotating machine can pull, strike or trap the operator; wet cement contact and noise can injure workers.
Control: Operator follows the unit’s starting and guiding method, keeps the helper outside its travel path and uses assessed skin, eye, foot and hearing protection. Keep exhaust out of occupied areas. Stop for loss of footing or unusual response.
Verification: Crew confirms stop communication and separation; operator watches footing and machine response throughout each pass.
Why this belongs in the analysis: The working position and machine zone control the contact exposure.
5. Stop for adjustment or cleaning
Hazard: Stored rotation and unintended starting can cause severe contact injury.
Control: Stop, wait for motion to cease and control hazardous energy under the applicable concrete equipment and manufacturer procedure before blade adjustment or servicing. Never bypass the release control.
Verification: Authorized person verifies the required safe state before entering the guarded area.
Why this belongs in the analysis: An idle engine is not evidence that servicing is safe.
6. Refuel and hand over
Hazard: Hot surfaces, fuel spills or an unsecured machine can create fire or trip hazards for the next crew.
Control: Refuel only after shutdown and cooling as instructed in the designated location. Collect residue, park the machine securely and identify unfinished edges or restricted areas to the receiving crew.
Verification: Foreperson checks the machine parking location and finishing area at handover.
Why this belongs in the analysis: The analysis ends when the next crew can use the area safely.
Compare control wording
| Needs improvement | More useful for this scenario |
|---|---|
| Be careful around the equipment. | Trained operator checks guarding, blade attachment and controls using the model instructions. The manually guided powered trowel must shut off power when hands leave its handles; remove a defective unit from service. |
| Check the area before starting. | Foreperson obtains the placing crew’s handover, protects openings and establishes a machine zone with a clear operator route. Hold machine access until the slab and route suit the equipment. |
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 1926.702 Concrete equipment and 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.
Developed by Todd Jerome Jenkins, MS, CSP · Edition v1.0 · October 9, 2026
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