First, describe the work and worksite
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.
Questions 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?
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. 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.
What does a useful control look like?
| 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. |
Decisions that change the analysis
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.
Agree when the crew will 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. Keep unresolved actions visible.
Download the worked example and free 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.
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
- 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 applicable qualifications, task instruction and actual training evidence for the people assigned. Related toolbox talks support toolbox talks; they do not establish competence.
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.