Light Manufacturing, Warehouse & Drivers
Class Code 3066: Sheet Metal Work—Shop & Drivers — Workers' Comp Insurance
Covers shops that fabricate sheet metal products such as ductwork, housings, and metal components, plus the shop's own delivery drivers. It's the manufacturing-side classification for sheet metal work performed in a shop setting, distinct from field installation.
- Risk level:
- moderate
What code 3066 covers
Class 3066 applies to shops that cut, form, weld, and assemble sheet metal products — ductwork sections, enclosures, housings, and similar fabricated metal components — using shears, brakes, and welding equipment, along with drivers who deliver finished products from the shop. The classification is built around bench and floor-based fabrication work performed at a fixed shop location, involving sheet-metal edge, press, and welding exposure rather than the on-site, ladder- and jobsite-based hazards of installing that ductwork or metalwork at a customer's building. Some state bureaus phrase this classification slightly differently — for example as a general sheet metal products manufacturing code — while covering essentially the same shop-based fabrication work. Shops that also send crews out to install or service what they fabricate need that field-installation portion evaluated under the separate contracting classification for that work.
Included operations
- Cutting, shearing, and forming sheet metal stock
- Welding and assembly of ductwork, housings, and metal components
- Shop finishing and quality inspection of fabricated metal products
- Shop-employed drivers delivering finished products to customers or job sites
Assigned elsewhere
- Field installation or on-site assembly of sheet metal or HVAC ductwork at a customer's building — see code 5538 (Sheet Metal Work—Shop and Outside & Drivers NOC)
- General machine shop work not specific to sheet metal fabrication — see code 3632
- Electrical apparatus manufacturing — see code 3179
- HVAC equipment installation and service performed at a job site — see code 5537
Businesses that typically carry 3066
- Sheet metal fabrication shops
- Ductwork manufacturers
- Metal enclosure and housing fabricators
- HVAC component manufacturers supplying installers
- Custom metal fabrication shops
- Shops producing metal building components for contractors
- Small and mid-size production shops
- Contract manufacturers serving other businesses
Common misclassifications
Code 5538
A shop that also sends crews to install the ductwork or sheet metal it fabricates is sometimes left entirely under the shop-only manufacturing code instead of splitting out the higher-hazard field-installation work.
Code 3632
Sheet metal fabrication and general machine shop work both involve metalworking equipment, but sheet metal work has its own dedicated classification distinct from the general machine shop NOC code.
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What drives the cost of code 3066
- Total annual payroll for employees assigned to this classification
- Experience modification factor based on claims history
- State-specific base rates and loss costs filed for this class code
- Claims frequency and severity trends for the business
- Safety programs, training, and workplace controls in place
- Payroll mix across multiple classifications at the same location
What underwriters look for
- Machinery and equipment used, including guarding and lockout/tagout procedures
- Shift patterns, overtime, and production volume
- Prior claims history, especially repetitive-motion and machine-related injuries
- Safety program documentation and OSHA history
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.
Quote class code 3066.
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Class code 3066 questions
Does this code cover installing the ductwork we fabricate at a customer's building?
No, on-site installation is typically evaluated under a separate contracting classification (5538) distinct from shop-based manufacturing.
Are our shop delivery drivers included in this code?
Yes, drivers delivering finished sheet metal products from the shop are part of this classification.
Is this the same as general machine shop work?
No, it's a more specific classification for sheet metal fabrication, distinct from the general machine shop NOC code.
Does the exact phrasing of this code vary by state?
Some state bureaus use slightly different wording, such as a general sheet metal products manufacturing classification, for what is substantially the same shop-based fabrication work.
Last reviewed · Reviewed by Provident Financial Group licensed agents