First, describe the work and worksite
A roofing crew will install a specified retrofit roof drain into an accepted existing outlet on a released low-slope building roof. The work includes protected access, limited drain preparation, compatible retrofit connection and membrane interface, inspection and a controlled drainage handover. This fictional learning example describes planned controls; it records no actual inspection or work authorization.
- The actual outlet, retrofit assembly and membrane connection have been selected and accepted for this roof.
- Opening/edge protection, weather monitoring and the building’s temporary drainage arrangement remain in force throughout the task.
- Opening enlargement, drain sizing, confined-space/pipe entry, concealed piping repairs and a redesign of the drainage system are excluded.
Questions before work
- What proves this retrofit fits the accepted existing outlet and roof system?
- How will water be managed while the drain is temporarily unavailable?
- Who controls the inspection or test and receives unresolved drainage issues?
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 roof and drainage access
Hazard: An unprotected outlet, edge or wet walking surface can expose workers before the drain is opened.
Control: Confirm released roof access, opening/edge protection and the actual temporary drainage and weather plan. Coordinate affected building areas and stop conditions before isolating the drain; maintain protection for every work position.
Verification: Roofing lead records protection, weather and temporary drainage findings.
Why this belongs in the analysis: A short interruption can still expose the building to water and workers to an opening.
2. Verify outlet and assembly compatibility
Hazard: The wrong insert or damaged outlet can conceal an unsuitable connection.
Control: Identify the specified assembly and accepted outlet condition, dimensions and roof-system interface using the actual detail. Review the required installation and test instructions; hold work for unexpected corrosion, obstruction or fit differences instead of changing the opening or substituting a part.
Verification: Lead confirms actual fit/condition findings and unresolved issues before preparation.
Why this belongs in the analysis: An insert that enters an outlet has not thereby passed connection acceptance.
3. Prepare the controlled outlet area
Hazard: Debris, sharp materials and cleaning products can expose workers or enter the drainage system.
Control: Use the specified surface preparation and suitable tools from protected positions. Control debris and temporary covering without blocking the agreed drainage arrangement; follow chemical controls and stop for unknown materials or a need to enter or repair concealed piping.
Verification: Installer checks the prepared interface and containment of removed material.
Why this belongs in the analysis: Preparation must stay within the accepted roof-side retrofit boundary.
4. Install the retrofit connection
Hazard: Pinch points, dropped parts or unsuitable tightening can leave a damaged or incomplete assembly.
Control: Maintain opening protection while positioning the actual retrofit and completing its designated connection. Use its supplied/approved components and installation criteria; do not invent a tightening value, sealing method or concealed pipe repair to overcome a poor fit.
Verification: Assigned lead records connection findings against the actual assembly instructions.
Why this belongs in the analysis: A generic drain procedure cannot supply model-specific sealing or tightening criteria.
5. Complete roof interface and inspect
Hazard: Incompatible flashing or an uncontrolled water test can damage the roof or affected building areas.
Control: Complete the specified membrane/flashing and clamping interface. Inspect and conduct only the accepted test under its controlled water, monitoring and stop arrangements; record results and route leakage or unresolved flow concerns to the responsible trade.
Verification: Roofing and drainage leads verify the required connection, membrane and test findings.
Why this belongs in the analysis: A visual seal cannot stand in for the project’s required inspection or test.
6. Restore service and hand over
Hazard: A retained temporary cover, blockage or uncommunicated defect can affect the next rain event.
Control: Remove temporary restrictions only through the agreed release, clear controlled debris and confirm intended roof-side service status. Transfer actual test results, incomplete work and any concealed-piping concerns to the receiving lead; maintain restrictions where acceptance is unresolved.
Verification: Receiving lead acknowledges drainage status, weather readiness and open actions.
Why this belongs in the analysis: The crew’s departure must not become an implied drainage-system acceptance.
What does a useful control look like?
| Needs improvement | More useful for this scenario |
|---|---|
| Work carefully and wear PPE. | Use the specified surface preparation and suitable tools from protected positions. Control debris and temporary covering without blocking the agreed drainage arrangement; follow chemical controls and stop for unknown materials or a need to enter or repair concealed piping. |
| Check that everything is ready. | Confirm released roof access, opening/edge protection and the actual temporary drainage and weather plan. Coordinate affected building areas and stop conditions before isolating the drain; maintain protection for every work position. |
Decisions that change the analysis
Does this example authorize replacing any roof drain or sizing the outlet?
No. It covers one specified compatible retrofit in an accepted existing outlet. Drain sizing, system redesign, opening changes and concealed piping require their own qualified decisions and work planning.
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
- Assembly/outlet mismatch, damage or a need for concealed piping work.
- Temporary drainage, opening protection or weather controls cannot be maintained.
- Unexpected material, leakage, failed acceptance test or an unapproved connection change.
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
- Actual retrofit assembly, membrane-interface and controlled inspection/test instruction for the selected detail.
- Roof opening/fall protection, temporary drainage and weather coordination, suitable tools and product hazard communication.
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
- Zurn Retrofit roof drain technical resources
- OSHA 1926.501 Duty to have fall protection
- OSHA 1926.300 Hand and power tools
- OSHA 1910.1200 Hazard communication
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.