First, describe the work and worksite
A specialist lifting crew will make one prescribed releveling lift of a surveyed wood floor in an unoccupied building bay. The engineer-designed bearing and lifting-support arrangement is already erected and accepted. Identified hydraulic cylinders and their pump advance the floor through monitored stages with mechanically secured load holds. Work ends at accepted temporary-support handover before structural repair or permanent support changes. This fictional learning example describes planned controls; it records no actual inspection or work authorization.
- Current US engineering documents identify the complete load path, lifting points, receiving foundation, permitted movement, connected-element isolation and required mechanical support at every hold. No crew-selected lift increment or pressure is supplied.
- The actual cylinders, pump, hoses, couplers, gauges and bearing attachments have compatible current instructions. Protected operating and observation positions remain outside unsupported-load and pinch exposures.
- Framing-alteration coverage is partial: designed hydraulic floor lifting only. Support design/erection, whole-building relocation, occupied lifting, emergency stabilization, member repair and removal of retained support are excluded.
Questions before work
- What actual observations and limits permit the next movement stage?
- How will mechanical restraint secure the load immediately without a worker entering beneath hydraulic support?
- Who accepts the final mechanically supported state before hydraulics are unloaded?
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. Release the surveyed lifting stage
Hazard: Lifting an unknown load or connected structure can damage the building or overload the receiving foundation.
Control: Lifting lead matches the surveyed floor, affected connections, isolated services and erected support acceptance to the engineer’s issued lift stage. Confirm actual movement and load limits, observer locations, hold points and emergency stop responsibilities. Obtain disposition for changed framing or cracks; an existing shore release is not permission to raise the floor.
Verification: Lead records the applicable lift stage and resolved structure, support and isolation evidence.
Why this belongs in the analysis: Floor movement needs a separate engineered basis from stationary load support.
2. Inspect the complete hydraulic arrangement
Hazard: An incompatible hose, unstable cylinder or eccentric bearing can fail under pressure or eject a component.
Control: Inspect the identified cylinders, pump, couplers, gauges and approved attachments under their current manuals and the lifting design. Verify capacity, support contact, centered load transfer and protected hose routing. Check required inspection evidence and remove defects. Prepare connections and any instructed commissioning only in the accepted safe load state; no field-welded or improvised attachment is permitted.
Verification: Operator verifies the matched system, bearing arrangement and resolved inspection findings.
Why this belongs in the analysis: The system limit is not established by its largest component.
3. Establish observation and mechanical hold readiness
Hazard: Poor communication or an unavailable mechanical support method can leave a raised floor supported only by fluid pressure.
Control: Restrict the bay and set protected operator and observer positions, clear routes and one effective stop signal. Verify the design’s blocking/restraint method can secure each raised stage immediately from safe positions. Prepare actual monitoring references and mechanical components before pressurizing. Do not start if support placement would require anyone beneath a hydraulically supported load.
Verification: Lead rehearses stop communication and verifies safe mechanical-hold access and monitoring readiness.
Why this belongs in the analysis: Mechanical support must be achievable before movement creates the need for it.
4. Lift only through the prescribed monitored stage
Hazard: Uneven or excessive movement can split framing, destabilize supports or damage connected construction.
Control: Assigned operators follow the actual pump/cylinder method and engineer’s coordinated movement sequence. Observe prescribed floor, connection and foundation response from protected positions. Maintain mechanical restraint and secure the raised load at once as required. Stop for response outside acceptance, loss of signals, pressure abnormality or support movement; do not increase pressure to overcome unexplained resistance.
Verification: Named observers record movement and support response at each required hold point.
Why this belongs in the analysis: Pressure indication alone cannot establish acceptable structural movement.
5. Transfer onto accepted mechanical support
Hazard: Premature hydraulic release or entry near loaded bearings can cause sudden descent and crushing.
Control: Verify the engineer-specified mechanical supports and restraint are fully engaged and accepted before the prescribed load transfer. Control lowering or pressure release by the actual system procedure while observers remain clear. Hold any unsettled or slipping contact for engineering disposition. Hydraulic cylinders provide lifting force; they are not permanent spacers or the final load-holding arrangement.
Verification: Lead records mechanical-support acceptance and verifies the intended load state after transfer.
Why this belongs in the analysis: A contact point is not proof that the full mechanical load path is secure.
6. Isolate hydraulics and hand over restrictions
Hazard: Trapped pressure or an uncommunicated support restriction can expose the next crew during disconnecting or repair.
Control: Keep accepted mechanical support in place. Authorized personnel verify the actual safe hydraulic state before permitted disconnection; never loosen a coupler to bleed trapped pressure or search for leaks by hand. Secure equipment and contained fluid waste. Transfer lift observations, support identity, continuing monitoring and open holds; later alteration and support removal require their separate releases.
Verification: Receiving lead confirms the mechanically supported state and continuing work restrictions.
Why this belongs in the analysis: The handover must describe what now supports the floor, not only how far it moved.
What does a useful control look like?
| Needs improvement | More useful for this scenario |
|---|---|
| The shore is tight; raise it until the floor looks level. | Use the separate issued lifting stage with actual movement references, coordinated operators and engineering hold points. |
| Leave the hydraulic pressure on overnight. | Transfer the load onto accepted mechanical support and verify it before unloading and securing the hydraulic system. |
Decisions that change the analysis
How is this different from temporary-shore erection?
That resource erects stationary support and expressly excludes floor raising. Here an already accepted lifting arrangement produces controlled building movement, requires immediate mechanical holds and transfers the load off hydraulics. Joist replacement and wall removal occur only under separately accepted load isolation.
What must the crew record for actual use?
Record the actual work boundary, governing documents, responsible people, acceptance criteria, control findings and unresolved actions. Communicate restrictions and obtain required project authorization; this fictional example records no completed inspection or installed-control acceptance.
Agree when the crew will pause
- The issued lift sequence, support/foundation acceptance, isolation or safe mechanical-hold method is unresolved.
- Movement, pressure, bearing or foundation response differs from criteria, a leak appears or communication is lost.
- Anyone would enter beneath hydraulic support, a mechanical hold cannot be accepted or retained supports would be changed without 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
- Identified hydraulic lifting-system instruction covering compatibility, load limits, gauges, controlled movement and verified pressure release.
- Engineer-issued staged-lift reading, movement monitoring, mechanical support transitions, stop communication and support-state 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 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 reviews; renaming a JHA does not complete them.
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
- Enerpac hydraulic cylinders, L1608 Rev. J, November 2024
- Enerpac RC106 current document database
- OSHA 1926.305: jack support, operation and inspection
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.