Consulting Manufacturers, Suppliers, and Subject Matter Experts
Key Takeaways
- Manufacturers and suppliers should be consulted when equipment limits, materials, compatibility, or installation requirements are uncertain.
- Subject matter experts are needed when site personnel lack the qualifications to evaluate specialized hazards or designs.
- Manufacturer instructions and technical data must be current and applied to the specific model, configuration, and use.
- A CHST should document technical guidance, decisions, assumptions, and any restrictions placed on the work.
Consulting Manufacturers, Suppliers, and Subject Matter Experts
Knowing When to Ask
A CHST does not need to be the expert on every product, system, or technical discipline. The important skill is recognizing when the site has reached the limit of available knowledge. Manufacturers, suppliers, engineers, industrial hygienists, competent persons, qualified persons, and other subject matter experts should be consulted when uncertainty affects worker safety.
Common triggers include missing equipment manuals, modified tools, damaged components, unusual loads, chemical substitutions, scaffold or shoring questions, fall protection anchor capacity, respiratory protection selection, noise controls, silica exposure methods, temporary structure design, confined space classification, or crane and rigging complexity. If the answer depends on engineering judgment, exposure science, product compatibility, or manufacturer limits, ask the appropriate expert before work proceeds.
Manufacturers and Suppliers
Manufacturers provide model-specific instructions, limitations, inspection criteria, replacement parts, maintenance requirements, and prohibited uses. Suppliers may provide SDSs, technical data sheets, installation guidance, compatibility information, and product availability. The CHST should make sure the information applies to the exact item on site, not a similar product.
| Situation | Consult | Reason |
|---|---|---|
| Damaged fall arrest lanyard | Manufacturer or qualified person | Determine removal from service and replacement criteria |
| New chemical cleaner | Supplier and SDS | Identify hazards, PPE, storage, and incompatibilities |
| Modified scaffold component | Manufacturer or qualified person | Verify compatibility and load capacity |
| Unusual excavation support | Registered professional engineer | Evaluate protective system design |
Manufacturer instructions are not optional field suggestions. If the site wants to use equipment outside the manual, the CHST should require written approval from the manufacturer or a qualified person with authority to make that determination. Improvised modifications can void ratings and create hidden failures.
Subject Matter Experts
Subject matter experts are needed for specialized hazards. An industrial hygienist may evaluate airborne exposure and sampling strategy. A structural engineer may assess temporary support. A safety professional with crane expertise may review lift planning. A medical provider may advise on fitness-for-duty processes while preserving confidentiality. A competent person may inspect excavations, scaffolds, or fall protection systems where the regulation requires that role.
The CHST should clarify the question before consulting. Instead of asking, "Is this okay?" ask, "Can this anchor support the intended fall arrest load for this configuration?" or "What respirator and cartridge are appropriate for this product at expected exposure levels?" Clear questions produce useful guidance.
Current Information and Documentation
Technical information changes. Manuals are revised, products are discontinued, SDSs are updated, and standards change. Use current information from reliable sources: manufacturer websites, supplier technical representatives, current SDSs, applicable standards, consensus guidance, regulatory interpretations, and qualified experts. Do not rely on memory when a current document is available.
Document who was consulted, the date, the question, the guidance received, documents reviewed, and any limits or assumptions. If verbal guidance affects safety, follow up with written confirmation when practical. Keep the documentation with the relevant plan, permit, JHA, or equipment record.
Applying Guidance
Consultation is valuable only if it changes the field decision. If a supplier says a chemical cannot be mixed with bleach, storage and cleaning procedures must reflect that. If a manufacturer says a component must be removed from service after impact loading, do not return it to use because it looks intact. Technical guidance should become a control that supervisors can understand and verify.
A crew wants to drill extra holes in a manufactured guardrail base to fit an unusual deck condition. What should the CHST recommend?
Which situation most clearly requires a subject matter expert?
What is the best way to handle verbal technical guidance from a supplier that affects worker protection?