First, describe the work and worksite
A specialist repair crew will install one producer/engineer-issued bonded reinforcement assembly at an inadvertent top-compression-flange notch in an identified single-ply TJI floor joist. The bay is unloaded and stably supported, with both bonding interfaces accessible from a released platform. Prepared specified wood reinforcement, WEST SYSTEM Six10 adhesive and prescribed screws form the repair; loading remains held through actual cure and technical acceptance. This fictional learning example describes planned controls; it records no actual inspection or work authorization.
- The producer/engineer confirms current TB-832 applicability: one allowable compression-zone notch in a properly designed single-ply floor joist, uniform loading and undamaged adjacent joists. Roof joists, fire-resistance-rated assemblies and conditions outside the accepted repair are excluded.
- Current repair documents specify reinforcement identity/orientation, prepared geometry, holes, screws, adhesive and inspection/cure criteria. Clean, dry, unweathered bonding faces and protected access are required before material is dispensed. Before opening or using adhesive, verify actual supplied current SDS for both Six10 components; hold material use if either is missing.
- Framing-repair coverage is partial: this accepted top-flange bonded reinforcement only. New notch cutting, flange replacement, generic sistering, truss-plate pressing, adhesive substitution, structural diagnosis and shore removal are excluded.
Questions before work
- Which producer/engineer record confirms that this exact damage qualifies for the specified repair?
- How will the required bond faces and screw positions be inspected before concealment?
- What actual environmental and acceptance evidence keeps load off until the repair is released?
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. Confirm the specific repair applicability
Hazard: An unsuitable notch repair can conceal damage or transfer load through a product condition the bulletin does not cover.
Control: Repair lead matches the identified single-ply floor joist and surveyed notch to the actual producer/engineer disposition. Confirm damage zone, loads, adjacent-member condition and all applicable bulletin limitations. Hold conflicting geometry, weathered material or additional damage for technical review; a downloaded repair table is not an approval for an unidentified joist.
Verification: Lead records the matched member, current disposition and resolved applicability conditions.
Why this belongs in the analysis: A proprietary contingency repair is bounded to its stated product and damage conditions.
2. Protect unloaded support and repair access
Hazard: Workers can fall, disturb support or load the damaged member while preparing a concealed joint.
Control: Verify the separately accepted support and load-isolation state. Establish the released platform, access route and exclusion below; do not climb or stand on the joist. Prevent adjacent crews or stock from reloading the bay. Maintain visibility and safe tool reach to every required contact face and fastening point throughout installation.
Verification: Lead verifies stable support, protected positions and effective loading restrictions.
Why this belongs in the analysis: Bond preparation is unsafe if the member’s load state can change unnoticed.
3. Match prepared wood and bond surfaces
Hazard: Wrong reinforcement orientation or contaminated contact faces can prevent the intended bond and weaken the assembly.
Control: Identify the specified prepared EWP reinforcement and predrilled screw arrangement against the issued detail. Check condition and fit without cutting a larger notch or forcing the joist. Prepare the accepted surfaces by the actual repair and adhesive method, keeping wood clean, dry and unweathered. Control any preparation residue; hold damaged faces or an unaccepted gap for disposition.
Verification: Installer records reinforcement identity, orientation, fit and bond-face readiness.
Why this belongs in the analysis: Adhesive cannot compensate for an unaccepted reinforcement or substrate condition.
4. Dispense the specified adhesive under control
Hazard: Uncured resin or hardener can injure skin and eyes or cause sensitization; incorrect dispensing can leave an incomplete bond.
Control: Before opening or using adhesive, obtain and review actual supplied current SDS for both Six10 components; hold material use if either is missing. Use the exact Six10 cartridge, compatible applicator/static mixer and current instructions. Arrange ventilation, assessed chemical-resistant protection, washing and contained waste. Follow instructed dispensing and application to all specified contact surfaces. Do not substitute another adhesive, thin the product or use a curing nozzle’s resistance as a reason to force the gun.
Verification: Operator checks material identity, dispenser condition and complete prescribed bond-face application.
Why this belongs in the analysis: The repair’s specified adhesive system is part of its technical basis.
5. Seat reinforcement and complete prescribed screws
Hazard: Wrong fastening order, poor seating or excess force can leave dry interfaces, split wood or trap fingers.
Control: Install the prepared reinforcement in the actual detail’s screw sequence while the joist stays unloaded and supported. Use compatible tools and safe hand positions. Inspect required contact and squeeze-out evidence and all scheduled screw locations before concealment. Stop for splitting, failed seating or incomplete bond evidence; add no unscheduled screws or crew-selected clamping pressure.
Verification: Named checker records interface engagement and required screw findings at the repair hold point.
Why this belongs in the analysis: Visible screw heads alone cannot establish the concealed bonded assembly.
6. Protect cure and transfer technical acceptance
Hazard: Early loading, contamination or an undocumented cure condition can activate a repair before its required release.
Control: Maintain load isolation, support and the actual environmental protection through the governing repair and adhesive cure requirements. Record material, installation and cure observations; reconcile any conflicting instructions with the producer/engineer before release. Collect uncured waste without skin contact and transfer unresolved holds. A hard-looking bead or elapsed generic time is not structural acceptance or permission to remove support.
Verification: Receiving lead confirms cure records, technical review status and continuing load restrictions.
Why this belongs in the analysis: The completed joint remains held until its actual acceptance process is satisfied.
What does a useful control look like?
| Needs improvement | More useful for this scenario |
|---|---|
| Any construction adhesive and sister board will do. | Match the specific producer/engineer repair, prepared reinforcement, Six10 system and prescribed screws. |
| The epoxy bead feels hard; remove the support. | Maintain unloaded support through actual cure evidence and designated technical acceptance; support removal is separately released. |
Decisions that change the analysis
Does this duplicate joist replacement or connector retrofit?
Joist replacement removes a damaged solid-sawn member. Connector retrofit adds metal hardware; the truss press embeds toothed plates. This repair bonds specified wood reinforcement at a qualified TJI compression-flange notch and requires bond and cure evidence. It supplies no general joist-repair design.
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
- Member identification, specific repair applicability, support/load isolation or exact materials cannot be confirmed.
- Bond faces are wet, weathered or contaminated, fit differs, screws split wood or dispensing/contact evidence is unacceptable.
- Cure conditions change, another adhesive is proposed or concealment/loading would occur before required checks and acceptance.
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
- Issued TJI repair-detail reading covering applicability, reinforcement orientation, specified adhesive, screw sequence and concealed bond checks.
- Two-part epoxy handling, compatible dispensing equipment, skin/eye exposure prevention, protected cure and loading-restriction 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
- Weyerhaeuser TB-832: top compression-flange repair, May 2025
- WEST SYSTEM Six10 adhesive and current instructions
- WEST SYSTEM current component safety-data-sheet library
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.