Contractors
Class Code 5538: Sheet Metal Work—Shop and Outside & Drivers NOC — Workers' Comp Insurance
Covers sheet metal contractors fabricating and installing ductwork and metal building components, both in the shop and on the job site, along with drivers. It applies to sheet metal work broadly, beyond what's tied specifically to HVAC installation.
- Risk level:
- elevated
What code 5538 covers
Class 5538 applies to sheet metal contractors who fabricate and install sheet metal products such as ductwork, flashing, and metal building components, covering both shop fabrication work and outside/field installation, along with drivers who transport materials and crews. Shop work involves cutting, bending, and forming metal using powered fabrication equipment, while outside work involves installing the finished product on job sites, often at height or in tight mechanical spaces. This classification is broader than the sheet metal work tied specifically to HVAC ductwork under the HVAC contractor code, covering general sheet metal fabrication and installation work for a range of building applications. Contractors performing both HVAC installation and general sheet metal work may need to determine which classification best captures the bulk of their operations, or split payroll between the two.
Included operations
- Shop fabrication of ductwork and sheet metal components
- Cutting, bending, and forming metal using powered equipment
- On-site installation of ductwork and metal building components
- Drivers transporting materials and crews to job sites
Businesses that typically carry 5538
- Sheet metal fabrication and installation contractors
- Ductwork fabrication shops
- Commercial sheet metal contractors
- Small, owner-operated contracting businesses
- Regional trade contracting companies
- Subcontractors working for general contractors
- Design-build contracting firms
Common misclassifications
Code 5537
Sheet metal contractors whose work is primarily tied to HVAC ductwork installation may fit better under the HVAC contractor classification depending on the scope of business.
Code 3632
Sheet metal shops that also perform general machine shop work can blend two distinct manufacturing and contracting classifications if that scope isn't tracked.
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What drives the cost of code 5538
- Total payroll for employees performing the classified work, not gross receipts
- Experience modification factor built from claims history
- State-specific base rates and loss costs filed for this class code
- Use of subcontractors and whether they carry their own workers' comp coverage
- Safety programs, jobsite supervision, and documented training
- Payroll properly split across multiple classifications when work crosses trades
What underwriters look for
- Years in business and prior workers' comp loss history
- Types of jobs typically performed (new construction, remodel, residential vs. commercial) and average job size
- Whether subcontractors are used and certificates of insurance are collected and tracked
- Total payroll for employees actually performing the classified work
- Safety program, training documentation, and any OSHA history
Eligibility
State differences
This entry uses standard NCCI class code phraseology, which applies in most NCCI-governed states. Pennsylvania (PCRB), Delaware (DCRB), California (WCIRB), New Jersey (NJCRIB), Michigan, New York (NYCIRB), and Massachusetts maintain their own classification manuals, and code numbers or phraseology can differ there. Our agency confirms the correct classification for your state before quoting.
Where code 5538 fits
Quote class code 5538.
One application goes out to every carrier we can access for your class of business. You get a ranked comparison you can review and purchase online — with a licensed agent available whenever you want one.
Mon–Fri, 8:00am–6:00pm ET · Independent agency licensed in 23 states
Class code 5538 questions
How is this different from the HVAC contractor code?
5537 is specific to HVAC system installation and service; 5538 applies to sheet metal fabrication and installation more broadly, including work beyond HVAC ductwork.
Does this code cover our shop fabrication work?
Yes, 5538 is written to include both shop fabrication and field/outside installation of sheet metal products.
Are our delivery drivers included?
Yes, drivers transporting materials and crews to job sites are part of this classification.
What if we do both HVAC installs and general sheet metal fabrication?
We review the balance of your operations to determine the best classification fit, or whether payroll should be split between the two.
Last reviewed · Reviewed by Provident Financial Group licensed agents