JHA / JSA / AHA builderPrefabricated Wood Floor Cassette Erection 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 Prefabricated Wood Floor Cassette Erection JHA
Walk through the job in order. Use these possible hazards, planned controls and checks to start a conversation about your actual work.
011. Match the complete cassette to the erection plan
Possible hazards: A wrong or incomplete unit can have different weight, lifting behavior and bearing locations.
Planned controls: Erection lead matches cassette identification, factory decking, fittings and delivered condition to the fabricator’s documents and issued project design. Confirm complete-unit weight, designated lifting points, receiving location and required erection-stage restraint. Hold damage, missing details or discrepancies for the fabricator and engineer; do not develop a lifting layout from a loose-joist handbook.
Check before work: Lead records the matched cassette, current instructions and resolved release requirements.
022. Prepare storage, receiving supports and protected access
Possible hazards: A distorted stored cassette, incomplete support or open floor edge can injure the receiving crew.
Planned controls: Check the stored unit’s supports and lateral restraint under fabricator instructions. Verify released receiving geometry, connection materials and bearing surfaces without unauthorized cutting or shimming. Establish protected receiving positions and a fall-control sequence for perimeter edges, panel gaps and openings. Keep the incomplete floor closed to unrelated trades and stored loads.
Check before work: Named checker verifies receiving release, unit condition and usable protected access before rigging.
033. Rig the designated complete-unit lifting points
Possible hazards: Unapproved rigging can bend the unit, pull out attachments or damage metal webs.
Planned controls: Qualified riggers install the actual complete-cassette lifting arrangement at identified fabricator-approved points, checking rigging, load sharing and clearance under the accepted crane plan. Do not use webs, decking or convenient openings as improvised pick points. Clear packaging only as permitted while storage stability remains effective, and establish one signaler before taking the load.
Check before work: Rigger and lead verify point identification, attachment condition and clear load paths.
044. Hoist and seat the cassette
Possible hazards: A broad suspended unit can swing or trap hands between its bearing and support.
Planned controls: Maintain the planned exclusion zone and wind limits while the signaler directs controlled travel. Receive from designated protected positions and guide with the selected means without reaching beneath the unit or standing in the closing bearing gap. Lower onto the specified supports in the planned orientation, stopping for misalignment, obstruction or unexpected deflection rather than forcing a fit.
Check before work: Receiving lead checks orientation, bearing contact and stable seating before connection work.
055. Connect and accept erection-stage restraint
Possible hazards: Releasing crane support can permit movement or expose an unprotected developing floor.
Planned controls: With the instructed crane support retained, complete the project-defined perimeter/interunit connections and temporary restraint in their specified sequence. Maintain protection at all edges and gaps during access. Check installed fasteners, bearing and required restraints against actual acceptance criteria, and obtain the named release before unloading and removing the lifting arrangement.
Check before work: Designated checker records the required connections and authorizes the crane-release hold point.
066. Hand over the developing floor state
Possible hazards: Later loads, missing gap protection or premature removal of restraint can defeat the installation.
Planned controls: Inspect the landed unit for handling damage and preserve required temporary restraint. Secure or protect remaining gaps and penetrations under the floor-use plan. Record accepted connections, incomplete interfaces, loading limits and any access hold, then transfer these to the next supervisor. Release floor use only through the project’s required inspection and acceptance process.
Check before work: Lead confirms recorded restrictions, maintained fall controls and the receiving supervisor’s handover.
Example scope and starting conditions
A crane and framing crew will install one identified factory-assembled wood floor cassette with attached decking onto released building supports. The fabricator’s lifting and erection instructions and the US project design govern the complete unit, its connection sequence and temporary stability. The developing floor remains restricted until its supports, connections and fall controls are accepted. This fictional learning example describes planned controls; it records no actual inspection or work authorization.
- The actual fabricator provides cassette identity, weight, lifting points, storage/handling instructions and erection sequence compatible with the engineer’s issued US project details.
- Receiving supports are released for the complete cassette, with protected landing access, designed temporary restraint and controls for perimeter edges, gaps and penetrations.
- Both floor-joist and subfloor matrix connections are partial: this is a complete prefabricated unit. Loose-joist installation, on-site cassette manufacture, deck-sheet installation and field redesign are excluded.
Know when to pause
- Complete-unit instructions, identification, weight, lifting points or receiving support release cannot be confirmed.
- Rigging or bearing moves unexpectedly, damage/deflection appears, signals are lost or weather exceeds the accepted criteria.
- A required connection, temporary restraint or floor-edge/gap control cannot be installed as planned before support release.
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
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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 supplier document authorizes lifting this complete cassette rather than applying individual-joist handling rules?
- How will receivers connect the cassette while every developing floor edge and panel gap remains protected?
- What must be accepted before crane support or restricted access can change?
Training and qualifications to confirm
- Fabricator-specific cassette identification, damage checks, handling points, connection sequence and reporting of unauthorized alterations.
- Crane erection coordination, protected receiving access, temporary stability and staged floor-use/fall-protection handover.
Confirm the actual training evidence for the assigned people. A toolbox talk does not establish competence.
Decisions that change the plan
Why is this a separate operation from I-joist and subfloor installation?
Those examples build a floor from loose members and then individually placed sheets. This operation moves and seats a factory-assembled structural/deck unit, with complete-unit lifting points, distortion control and staged connection release. Its matrix links cover those activities only where they connect to the prefabricated method.
What must the crew record for actual use?
Record the work boundary, design/equipment documents, responsible people, acceptance criteria, control findings and unresolved actions. Communicate restrictions and obtain required project authorization. This learning example supplies no evidence that a control was installed or accepted.
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.
Rigging: Before the Load Moves →Fall Prevention: Verify the Controls →Sheathing: Verify Support and the Next Panel →
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. Match the complete cassette to the erection plan
Hazard: A wrong or incomplete unit can have different weight, lifting behavior and bearing locations.
Control: Erection lead matches cassette identification, factory decking, fittings and delivered condition to the fabricator’s documents and issued project design. Confirm complete-unit weight, designated lifting points, receiving location and required erection-stage restraint. Hold damage, missing details or discrepancies for the fabricator and engineer; do not develop a lifting layout from a loose-joist handbook.
Verification: Lead records the matched cassette, current instructions and resolved release requirements.
Why this belongs in the analysis: Attached decking changes how the assembled floor is handled and supported.
2. Prepare storage, receiving supports and protected access
Hazard: A distorted stored cassette, incomplete support or open floor edge can injure the receiving crew.
Control: Check the stored unit’s supports and lateral restraint under fabricator instructions. Verify released receiving geometry, connection materials and bearing surfaces without unauthorized cutting or shimming. Establish protected receiving positions and a fall-control sequence for perimeter edges, panel gaps and openings. Keep the incomplete floor closed to unrelated trades and stored loads.
Verification: Named checker verifies receiving release, unit condition and usable protected access before rigging.
Why this belongs in the analysis: A decked cassette can look walkable before its erected support is complete.
3. Rig the designated complete-unit lifting points
Hazard: Unapproved rigging can bend the unit, pull out attachments or damage metal webs.
Control: Qualified riggers install the actual complete-cassette lifting arrangement at identified fabricator-approved points, checking rigging, load sharing and clearance under the accepted crane plan. Do not use webs, decking or convenient openings as improvised pick points. Clear packaging only as permitted while storage stability remains effective, and establish one signaler before taking the load.
Verification: Rigger and lead verify point identification, attachment condition and clear load paths.
Why this belongs in the analysis: An individual member’s handling rule is not a complete-cassette lifting authorization.
4. Hoist and seat the cassette
Hazard: A broad suspended unit can swing or trap hands between its bearing and support.
Control: Maintain the planned exclusion zone and wind limits while the signaler directs controlled travel. Receive from designated protected positions and guide with the selected means without reaching beneath the unit or standing in the closing bearing gap. Lower onto the specified supports in the planned orientation, stopping for misalignment, obstruction or unexpected deflection rather than forcing a fit.
Verification: Receiving lead checks orientation, bearing contact and stable seating before connection work.
Why this belongs in the analysis: A small seating error can leave part of a complete floor unsupported.
5. Connect and accept erection-stage restraint
Hazard: Releasing crane support can permit movement or expose an unprotected developing floor.
Control: With the instructed crane support retained, complete the project-defined perimeter/interunit connections and temporary restraint in their specified sequence. Maintain protection at all edges and gaps during access. Check installed fasteners, bearing and required restraints against actual acceptance criteria, and obtain the named release before unloading and removing the lifting arrangement.
Verification: Designated checker records the required connections and authorizes the crane-release hold point.
Why this belongs in the analysis: Factory decking does not replace erection-stage connections or fall protection.
6. Hand over the developing floor state
Hazard: Later loads, missing gap protection or premature removal of restraint can defeat the installation.
Control: Inspect the landed unit for handling damage and preserve required temporary restraint. Secure or protect remaining gaps and penetrations under the floor-use plan. Record accepted connections, incomplete interfaces, loading limits and any access hold, then transfer these to the next supervisor. Release floor use only through the project’s required inspection and acceptance process.
Verification: Lead confirms recorded restrictions, maintained fall controls and the receiving supervisor’s handover.
Why this belongs in the analysis: Cassette seating is one stage in a controlled floor-completion sequence.
Compare control wording
| Needs improvement | More useful for this scenario |
|---|---|
| The loose-joist guide shows lifting points; use those for the panel. | Obtain the actual fabricator’s complete-cassette lifting instructions and accepted project arrangement, accounting for factory decking, unit weight and all attachments. |
| The deck is attached, so the floor is ready. | Verify erected bearings, connections, temporary restraint and protected gaps/edges, then record the actual floor-use release and remaining loading restrictions. |
Common questions
Can this example be used as a JSA?
Adapt the Task | Hazard | Control sequence to the employer’s JSA and actual worksite. Name the control checkers and record findings; this fictional example supplies no completed inspection or authorization.
What changes if the project requires an AHA?
Use the governing AHA format, risk method, records and acceptance process. The published formwork AHA illustrates that structure. Add actual competencies, inspections and project reviews; renaming a JHA does not complete those requirements.
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
- SBCA floor trusses: factory-assembled floor panels
- MiTek Posi-Joist Technical Handbook Issue 7: cassette handling context
- OSHA 1926.501 Duty to have fall 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 9, 2026.
Developed by Todd Jerome Jenkins, MS, CSP · Edition v1.0 · October 13, 2026
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