JHA / JSA / AHA builderMagnetic Particle Structural Weld Examination 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 Magnetic Particle Structural Weld Examination JHA
Walk through the job in order. Use these possible hazards, planned controls and checks to start a conversation about your actual work.
011. Establish the weld and examination authority
Possible hazards: A wrong weld, unqualified method or assumed defect limit can produce a report that conceals an unexamined connection.
Planned controls: Examination lead matches weld marks, material and current test requirements to the qualified written procedure and designated examiner. Confirm the selected AC-yoke dry visible method, actual acceptance criteria and reporting authority. Verify separately released prepared surfaces and retained structural restrictions. Hold unavailable requirements; a welding qualification or a generic product instruction does not establish qualification to evaluate this examination.
Check before work: Lead confirms weld identities, qualified roles and the actual procedure/acceptance basis.
022. Prepare protected electrical and magnetic-field access
Possible hazards: Damaged power equipment, nearby medical implants or a worker reaching from an unsafe position can create shock, field or fall exposure.
Planned controls: Use the accepted dry work position and safe supply arrangement under construction electrical requirements and the actual Y-2 instructions. Inspect the required cord/connection condition, keep disconnection accessible and protect leads from damage. Establish the manufacturer's applicable magnetic-field/implant precautions and control adjacent access. Hold rain, unsuitable footing or uncertain supply protection rather than relying on the yoke's casing appearance.
Check before work: Examiner checks protected access, supply and required field boundaries before energizing.
033. Verify equipment performance and matched media
Possible hazards: A poorly performing yoke, wrong powder or inadequate viewing condition can miss relevant indications while giving a plausible test appearance.
Planned controls: Identify the actual Y-2, #1 Gray batch and compatible dispenser, with applicable instructions and SDS. Complete and record the written method's required equipment-performance and viewing checks using its accepted reference equipment. Keep prescribed reference equipment and test pieces stable, with hands and feet outside any test-load drop or crush path. Arrange assessed ventilation, eye/hand protection and dust-minimizing containment. Reject defective gear or compromised media and hold unverified performance; no borrowed test-weight or lighting value is supplied here.
Check before work: Qualified examiner records actual required performance, media and viewing-condition findings.
044. Examine the weld through the qualified coverage method
Possible hazards: Uncontrolled powder, prolonged energization or incomplete magnetization coverage can expose people and leave a portion of the weld unexamined.
Planned controls: Follow the written method's actual yoke positioning, orientations and area coverage, applying and handling the selected powder through the approved controlled dispenser method. Keep unrelated personnel clear and minimize airborne material; no compressed-air dispersal is included. Maintain the selected unit's duty and handling limits and stop for abnormal heat, poor contact, supply faults or inadequate visibility. Record interrupted or incomplete coverage.
Check before work: Examiner checks actual coverage and operating/control performance throughout the examination.
055. Evaluate and document actual indications
Possible hazards: Treating every pattern as harmless or applying an unapproved criterion can conceal a weld issue and encourage premature loading.
Planned controls: Qualified examiner evaluates relevant indications through the actual written procedure and project criteria, preserving location, coverage and required evidence. Mark and report findings through the accepted process and identify inconclusive results or repeat-examination needs. Do not grind an indication away, authorize repair or release structural support through this test. Keep the connection's separate acceptance authority informed of held findings.
Check before work: Designated examination authority records actual results and unresolved limitations for disposition.
066. Secure equipment and transfer the examination state
Possible hazards: Residual powder, an energized lead or an overstated report can expose the next crew or obscure remaining connection work.
Planned controls: Complete prescribed post-examination actions, including any required demagnetization, through the actual method and yoke instructions. Disconnect and secure equipment, contain powder waste through the SDS/site process and restore safe access. Deliver traceable examination records and held locations to the receiving lead. Any repair, re-examination or connection/load release remains separately authorized; a clean surface is not an acceptance record.
Check before work: Receiving lead confirms actual report scope, findings and continuing structural restrictions.
Example scope and starting conditions
A qualified examiner will perform a specified visible dry magnetic-particle examination on identified cooled ferrous-steel building welds using a Magnaflux Y-2 AC yoke and compatible #1 Gray powder. The weld surfaces and protected ground-level access are released beforehand. The written examination method governs coverage, equipment performance and indication evaluation. This fictional learning example describes planned controls and records no actual inspection or work authorization.
- The project supplies the qualified examination procedure, examiner requirements, weld identities, required performance checks, lighting/coverage criteria and actual indication acceptance process. This example supplies no universal defect limit, yoke lift-test criterion or certification.
- The actual Y-2 configuration, applicable manual, selected #1 Gray product/SDS and approved dispensing method are available. Known cooled dry surfaces are prepared independently; safe electrical protection, powder containment and magnetic-field precautions are established.
- Field-welding activity 238120-08 is a partial connection: post-weld visible dry examination only. Welding, cleaning solvents, coating removal, wet or fluorescent methods, rain exposure, radiography, defect repair and structural load release are excluded.
Know when to pause
- Weld identity, qualified procedure, examiner role or actual indication acceptance criteria is missing or mismatched.
- Equipment performance, compatible media, viewing condition, dry electrical access or magnetic-field precautions cannot be maintained.
- Coverage is incomplete, findings are unresolved or examination is being treated as permission to repair or release structural support.
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.
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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 qualified written examination procedure and acceptance criteria identify these welds and this exact yoke/media method?
- Can required electrical, magnetic-field, lighting and powder controls remain effective throughout the examination?
- Who evaluates the actual indications and receives unresolved findings before any separate connection or structural release?
Training and qualifications to confirm
- Required magnetic-particle examination qualification and actual procedure instruction on equipment performance, coverage, indications and report traceability.
- Y-2/#1 Gray instruction on safe supply, magnetic-field and implant precautions, duty limits, controlled powder handling, exposure response and safe shutdown.
Confirm the actual training evidence for the assigned people. A toolbox talk does not establish competence.
Decisions that change the plan
May the examiner grind an uncertain indication and repeat the test?
Not through this bounded examination. Preserve and report the finding and obtain the responsible weld/engineering disposition. Surface removal or weld repair changes the examined condition and needs its actual accepted procedure, worker controls and subsequent examination requirements. A repeated favorable image does not authorize structural use.
What must the examiner record for actual use?
Record weld/material identities, procedure and examiner basis, yoke/media identities, actual equipment-performance and viewing checks, coverage and interruptions. Preserve indications, criteria-based findings, limitations, post-examination actions and report receipt. Identify repair or re-examination holds without inventing a passed weld, completed qualification or connection/load release.
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.
Electrical & Extension-Cord Checks →Hazard Communication: Labels, SDS & the Task →Independent Verification: Confirm Without Being Led →
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. Establish the weld and examination authority
Hazard: A wrong weld, unqualified method or assumed defect limit can produce a report that conceals an unexamined connection.
Control: Examination lead matches weld marks, material and current test requirements to the qualified written procedure and designated examiner. Confirm the selected AC-yoke dry visible method, actual acceptance criteria and reporting authority. Verify separately released prepared surfaces and retained structural restrictions. Hold unavailable requirements; a welding qualification or a generic product instruction does not establish qualification to evaluate this examination.
Verification: Lead confirms weld identities, qualified roles and the actual procedure/acceptance basis.
Why this belongs in the analysis: The examination needs a defined method and accountable disposition before it generates evidence.
2. Prepare protected electrical and magnetic-field access
Hazard: Damaged power equipment, nearby medical implants or a worker reaching from an unsafe position can create shock, field or fall exposure.
Control: Use the accepted dry work position and safe supply arrangement under construction electrical requirements and the actual Y-2 instructions. Inspect the required cord/connection condition, keep disconnection accessible and protect leads from damage. Establish the manufacturer's applicable magnetic-field/implant precautions and control adjacent access. Hold rain, unsuitable footing or uncertain supply protection rather than relying on the yoke's casing appearance.
Verification: Examiner checks protected access, supply and required field boundaries before energizing.
Why this belongs in the analysis: A portable inspection tool still has electrical and magnetic exposures that must be controlled.
3. Verify equipment performance and matched media
Hazard: A poorly performing yoke, wrong powder or inadequate viewing condition can miss relevant indications while giving a plausible test appearance.
Control: Identify the actual Y-2, #1 Gray batch and compatible dispenser, with applicable instructions and SDS. Complete and record the written method's required equipment-performance and viewing checks using its accepted reference equipment. Keep prescribed reference equipment and test pieces stable, with hands and feet outside any test-load drop or crush path. Arrange assessed ventilation, eye/hand protection and dust-minimizing containment. Reject defective gear or compromised media and hold unverified performance; no borrowed test-weight or lighting value is supplied here.
Verification: Qualified examiner records actual required performance, media and viewing-condition findings.
Why this belongs in the analysis: The apparatus and examination conditions must demonstrate suitability before the weld is examined.
4. Examine the weld through the qualified coverage method
Hazard: Uncontrolled powder, prolonged energization or incomplete magnetization coverage can expose people and leave a portion of the weld unexamined.
Control: Follow the written method's actual yoke positioning, orientations and area coverage, applying and handling the selected powder through the approved controlled dispenser method. Keep unrelated personnel clear and minimize airborne material; no compressed-air dispersal is included. Maintain the selected unit's duty and handling limits and stop for abnormal heat, poor contact, supply faults or inadequate visibility. Record interrupted or incomplete coverage.
Verification: Examiner checks actual coverage and operating/control performance throughout the examination.
Why this belongs in the analysis: Complete method-based coverage matters more than a quick pass over a visible weld bead.
5. Evaluate and document actual indications
Hazard: Treating every pattern as harmless or applying an unapproved criterion can conceal a weld issue and encourage premature loading.
Control: Qualified examiner evaluates relevant indications through the actual written procedure and project criteria, preserving location, coverage and required evidence. Mark and report findings through the accepted process and identify inconclusive results or repeat-examination needs. Do not grind an indication away, authorize repair or release structural support through this test. Keep the connection's separate acceptance authority informed of held findings.
Verification: Designated examination authority records actual results and unresolved limitations for disposition.
Why this belongs in the analysis: Indication evaluation and structural use are distinct decisions requiring their proper authority.
6. Secure equipment and transfer the examination state
Hazard: Residual powder, an energized lead or an overstated report can expose the next crew or obscure remaining connection work.
Control: Complete prescribed post-examination actions, including any required demagnetization, through the actual method and yoke instructions. Disconnect and secure equipment, contain powder waste through the SDS/site process and restore safe access. Deliver traceable examination records and held locations to the receiving lead. Any repair, re-examination or connection/load release remains separately authorized; a clean surface is not an acceptance record.
Verification: Receiving lead confirms actual report scope, findings and continuing structural restrictions.
Why this belongs in the analysis: Closeout must preserve both worker protection and the limits of the examination evidence.
Compare control wording
| Needs improvement | More useful for this scenario |
|---|---|
| The weld has no obvious mark, so it passed. | Qualified personnel complete and record the actual method's coverage, performance and indication evaluation against the project criteria. |
| A small handheld yoke needs no electrical or exposure check. | Verify actual supply, cord condition, magnetic-field precautions, duty limits and powder controls before energizing. |
Common questions
Can this example be adapted to a JSA?
Use its Task | Hazard | Control analysis in the employer's actual JSA format. Confirm the scenario, assigned verification and real findings before relying on the adapted work plan.
What changes when the project requires an AHA?
Apply the governing AHA format, risk method, supporting records and acceptance process. The published formwork AHA illustrates additional structure; this JHA supplies no completed AHA rating or acceptance.
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
- Magnaflux Y-2 AC yoke operating manual: performance, electrical and magnetic-field precautions
- Magnaflux magnetic-particle instructions Rev0925: selected visible dry method
- Magnaflux safety data sheets: search #1 Gray for handling, exposure controls and disposal
- OSHA 1926.404 Construction electrical wiring design and protection
Original instructional scenario with planned controls. Primary references support hazard planning. Use actual equipment and product instructions, project design and employer requirements to establish field criteria. This example supplies no inspection findings or work authorization. Use actual equipment instructions and site requirements alongside these references. Reference review: October 13, 2026.
Developed by Todd Jerome Jenkins, MS, CSP · Edition v1.0 · October 13, 2026
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