First, describe the work and worksite
A glazing crew will hoist and install a factory-glazed curb-mounted unit on a released low-slope roof curb. The roof opening is protected before arrival and during the support transfer. This fictional learning example describes planned controls; it records no actual inspection or work authorization.
- The curb, roof support, unit lifting instructions, fastening and permanent fall-protection arrangement are established for the actual system.
- The roof and interior below have separated receiving and falling-object zones.
- This excludes cutting a new roof opening, roof structural alteration, electrical operators and walking or standing on the glazed unit.
Questions before work
- How is opening protection maintained while the unit is set?
- Are roof, curb and hoisting loads released for this stage?
- What permanent protection addresses falling through the installed skylight?
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 curb and opening
Hazard: An unready curb or uncovered opening can cause collapse or a fall.
Control: Lead checks structural/curb release and identifies opening protection for every stage. Coordinate temporary cover removal with alternative protection and restrict the interior below before the lift.
Verification: Lead verifies the stage sequence and protected positions.
Why this belongs in the analysis: Removing a cover creates an exposure before the skylight arrives.
2. Inspect and rig the unit
Hazard: Damage or lifting through an unsuitable part can drop the glazed assembly.
Control: Verify unit weight, condition and the manufacturer’s complete-unit lifting method. Qualified personnel select the approved attachments; do not lift by glazing bars, packaging or handles unless intended for that load.
Verification: Rigger checks unit and attachment identification against its instructions.
Why this belongs in the analysis: A factory unit has its own handling limits.
3. Control roof access and delivery
Hazard: The load can strike a worker or overload an unready roof area.
Control: Use the lift plan, clear the receiving zone and keep installers at protected positions. Place equipment and materials only in released roof-load locations; stop for wind that prevents unit control.
Verification: Lift and roof leads confirm route, loading and signals before approach.
Why this belongs in the analysis: Roof delivery is a separate loading event from final installation.
4. Seat and secure the unit
Hazard: A partly seated unit can slip while workers are beside the opening.
Control: Set onto the specified curb interface and complete the instructed retention sequence with temporary/lifting support maintained. Keep hands out of seating gaps and verify restraint before disconnecting gear.
Verification: Installation lead checks seating and required fasteners before support transfer.
Why this belongs in the analysis: A unit resting on the curb is not automatically secured.
5. Complete fall and weather protection
Hazard: Installed glazing may not support a worker; unfinished flashing can conceal an unsafe edge.
Control: Maintain the designed protection against falling through the skylight and keep workers off the glazing. Coordinate gasket, flashing and roof work without removing required protection; an impact-rated claim needs its actual documented basis.
Verification: Lead verifies protection and communicates non-walkable status.
Why this belongs in the analysis: The opening remains a fall exposure unless its selected protection controls it.
6. Hand over the roof and interior
Hazard: Unfinished retention or debris can expose roofers and occupants.
Control: Confirm unit installation checks, clear waste and record remaining flashing or inspection actions. Transfer skylight access limits and protection requirements to roofing and building leads.
Verification: Receiving leads confirm roof and interior release status.
Why this belongs in the analysis: Weather completion and access protection need a clear handover.
What does a useful control look like?
| Needs improvement | More useful for this scenario |
|---|---|
| Work carefully and wear PPE. | Use the lift plan, clear the receiving zone and keep installers at protected positions. Place equipment and materials only in released roof-load locations; stop for wind that prevents unit control. |
| Check that everything is ready. | Lead checks structural/curb release and identifies opening protection for every stage. Coordinate temporary cover removal with alternative protection and restrict the interior below before the lift. |
Decisions that change the analysis
Does a glazed skylight make the opening safe to walk over?
No. Treat the unit as non-walkable unless the actual system and design establish otherwise, and maintain the selected fall-through protection. This example supplies no load rating for the glazing.
What must the crew record for actual use?
Identify the actual equipment and work boundaries, responsible people, applicable criteria, inspection findings and open actions. Resolve changes with affected crews and obtain required project authorization before work.
Agree when the crew will pause
- Missing curb/roof release or an unprotected installation stage.
- Unit damage, lifting uncertainty or lost wind control.
- Permanent fall-through protection or fastening verification is unresolved.
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 or paid membership 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
- Complete-unit lifting and curb-mount installation instruction with applicable lift roles.
- Roof fall/opening protection, rescue arrangements and non-walkable glazing awareness.
Confirm applicable qualifications, task instruction and actual training evidence for the people assigned. Related toolbox talks support crew discussion; they do not establish competence.
Common questions
Can this example be used as a JSA?
Adapt its Task | Hazard | Control analysis to the employer’s format and actual conditions. The example is a teaching aid, not evidence that controls were checked.
What changes if the project requires an AHA?
Use the governing AHA format, risk method, supporting records and acceptance process. The published formwork AHA demonstrates that additional structure; changing a JHA title does not supply it.
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 1926.501 Duty to have fall protection
- VELUX Commercial Glass unit technical resources
- OSHA 1926.21 Safety training and education
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. Use actual equipment instructions and site requirements alongside these references. Reference review: October 9, 2026.