Short Answer
Prequalification through ISNetworld or Avetta is a third-party vetting of your safety program, insurance, and compliance record. Industrial plants, refineries, and construction companies require it before hiring contractors. For scaffold work, it demonstrates a documented safety culture and protects both you and your customer from liability.
Prequalification through ISNetworld or Avetta is the standard gate industrial customers use to vet contractors before hiring. For scaffold contractors in particular, it is not optional if you want access to the refinery, power plant, shipbuilding, and petrochemical work that builds revenue. Here is how it works and why it matters.
What Prequalification Actually Is
Prequalification is a third-party vetting system. You submit documentation of your safety program, insurance, OSHA recordkeeping, regulatory history, and incident reports to a platform like ISNetworld or Avetta. That platform reviews the data, scores your company, and publishes your profile to a buyer network. When a large industrial customer needs a contractor for a job, they search the platform and see your qualifications before they ever call.
It is not a government certification. OSHA does not run it. OSHA does not approve you as “safe”; that is not what regulatory approval means. What prequalification does is let a buyer know your company has a documented safety culture, current insurance, and a clean or managed regulatory record. That information alone is often enough for a buying decision at the big industrial jobs.
Why Industrial Customers Require It
Refineries, power plants, and petrochemical operations deal with hazardous environments where a scaffold failure or crew injury can stop work for weeks and trigger regulatory enforcement. Buyers look for contractors who have invested in safety systems and carry adequate insurance.
ISNetworld and Avetta let buyers filter the contractor pool instantly. Instead of calling companies individually for insurance and safety plans, a buyer logs into the platform and sees which contractors meet their criteria. A contractor not on the platform is not in the running. It is a gating function, plain and simple.
What Gets Reviewed in the Prequalification Process
When you apply for prequalification, you submit:
- OSHA recordkeeping: Total Recordable Incident Rate (TRIR), Days Away, Restricted or Job Transfer (DART), and Experience Modification Rate (EMR). These are your three safety metrics.
- Safety program documentation: Written policies for hazard identification, toolbox talks, incident investigation, corrective action, and worker training.
- Insurance certificates: General liability, workers compensation, employer liability, and any coverage specific to your scope (e.g., crane liability for rigging work).
- Regulatory compliance: Proof that you are current on licenses, bonds, certifications, and any outstanding OSHA citations or Department of Labor actions.
- Incident reports: Summaries of any lost-time or recordable incidents from the past 3 to 5 years, including root cause and corrective action taken.
The platform staff (or an automated system) review these documents against the buyer’s standards and score your company. A high score means you move to the active list and buyers can find you. A low score or missing documentation means your profile sits in a “needs updating” status, and job inquiries pause until you close the gaps.
The Difference Between TRIR, DART, and EMR
These three numbers are what buyers look at first:
TRIR (Total Recordable Incident Rate) is the count of all recordable injuries and illnesses per 200,000 hours worked. A TRIR of 5 means five recordable incidents per 100 full-time workers per year. A lower TRIR than your competitors in the buyer’s applicant pool gives you an edge; a high TRIR relative to your peers pushes you toward the bottom of the list.
DART (Days Away, Restricted, or Transferred) counts the more serious incidents: those that cause missed work or a change in job duties. A low DART (or zero) signals that when incidents do happen, they are minor. A high DART (relative to TRIR) suggests you have serious injury events.
EMR (Experience Modification Rate) is calculated by your workers compensation insurer and ranges from 0.7 to 1.5+. It reflects how your actual claim costs compare to the industry average. An EMR below 1.0 means you are safer than average (and you pay less for workers comp insurance). An EMR above 1.0 means you are paying a premium for higher claims. Buyers prefer an EMR below 1.0, and the lower it sits below that mark, the stronger the safety signal.
How to Prepare for Prequalification
Start by gathering your documentation:
- Three years of OSHA 300 logs (OSHA Form 300 and Form 301 for each incident)
- OSHA Form 300A summary (filed by January 31 each year)
- Your company’s insurance certificates (liability and workers comp)
- Copies of your written safety plan and standard operating procedures
- Any training records (competent person certifications, fall protection, etc.)
- Regulatory filing status (business license, state contractor license)
Once you have these organized, create an account on ISNetworld and/or Avetta (or ask your insurance broker to do it for you; many will). The platform will walk you through uploading documents and answering questionnaires about your company, your experience, and your practices.
Expect the full review to take 2 to 4 weeks. Some buyers have faster-track options if you pay a fee. Once you are approved, you are live on the platform, and buyers can see and contact you.
Staying Current After You Are Prequalified
Prequalification is not a one-time box. The platforms require ongoing updates: annual OSHA Form 300A filings, current insurance certificates, incident disclosure, and training records. Missing a renewal can drop your profile out of the active list, costing weeks of job opportunities. When a buyer searches, they see “current” contractors first.
The Bottom Line for Scaffold Contractors
ISNetworld and Avetta are the gating systems for industrial work. If you are not prequalified on at least one, you are excluding yourself from refineries, power generation, shipbuilding, and government contracts.
Prequalification rewards what you should be doing anyway: running a safety-conscious operation, maintaining OSHA compliance, and keeping insurance current. Contractors with strong safety programs and low incident rates see prequalification as a competitive asset. A one-point drop in TRIR can be the difference between “call this crew first” and “keep looking.”
Diamond Scaffold Services is prequalified on both ISNetworld and Avetta with zero TRIR and zero DART from 2022 to 2024, which reflects our commitment to the safety culture that industrial buyers expect.
If you are specifying scaffold equipment or hardware on an industrial site, start with a contractor who is current on ISNetworld or Avetta. Pair that vetting with a walkdown of your petrochemical site’s scaffold safety priorities, then get a quote that includes the full scope, materials, and lead time for your project.
Frequently Asked Questions
What Is Contractor Prequalification?
Prequalification is a third-party review of your company's safety practices, insurance coverage, regulatory compliance, and incident history. Platforms like ISNetworld and Avetta gather and score this data, then make it available to large industrial buyers who use it to screen contractors before hiring.
Do I Need to Be Prequalified to Work in Refineries or at Power Plants?
Most large industrial sites require it. Refineries, petrochemical plants, power generation facilities, shipbuilding yards, and government contractors typically mandate ISNetworld or Avetta clearance before you set foot on the property, regardless of the job size.
What Data Do They Review?
Safety program documentation, OSHA recordkeeping (TRIR, DART, EMR), insurance certificates, regulatory violations, and incident reports. They also verify business licenses, bonding, and credentials. The process takes weeks and requires you to maintain current documentation.
Does Prequalification Guarantee I Will Get Work?
No. It is a gate that must be open before a buyer will even consider you. Once you are prequalified, the customer still evaluates you on price, availability, references, and fit for the specific job. Prequalification removes a barrier, but does not close the sale.
How Often Do I Have to Renew Prequalification?
ISNetworld and Avetta require ongoing compliance; your profile updates when you submit new insurance, OSHA forms, training records, and incident reports. A lapse in any required document can flag your profile as non-current, blocking new job inquiries until it is resolved.
