Metal Fabrication & Welding — Minnesota

Half your risk is in the shop.
The other half left on a truck.

Fabricators get insured as manufacturers and then spend half their time on jobsites installing what they built. That crossover is where coverage falls apart: the shop policy stops at the door and the contractor coverage was never bought.

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Hot work and fire exposure addressed
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Field installation and completed operations
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Equipment, rigging, and transit in one program

You are a manufacturer until you are on a jobsite. Then you are a contractor.

Most fabrication accounts we review are written on a manufacturing form with nothing addressing field work. The moment a crew goes out to set, weld, or install, a different set of exposures applies and a different set of contract requirements comes with it.

  • Products-completed operations limits sized for shop work only
  • No installation floater on material staged at the jobsite
  • Additional insured endorsements that do not match the subcontract
  • Crane, rigging, and hoisting exposure unaddressed
  • Hot work permitting gaps that underwriters will find

Fabrication carries the highest fire load of any metalworking operation and the longest liability tail. Welding, cutting, and grinding start fires. Structural work creates completed operations claims that surface years later.

The two-sided program

✓ Shop: property, equipment, stock, business interruption
✓ Field: general liability with completed operations
✓ Transit: material moving to and from the site
✓ Equipment: inland marine on rigging and tools
✓ Contract: additional insured and risk transfer

Where the Exposure Is

Five exposures unique to fabrication

Hot work and fire

Welding, cutting, grinding, and plasma work are the leading ignition sources in metalworking occupancies. Underwriters price the account on how you manage it: permit systems, fire watch duration, spark containment, and housekeeping. Good practices here move premium meaningfully, and poor ones can make an account difficult to place at all.

Field installation and completed operations

Structural steel, railings, stairs, mezzanines, and equipment that you install create a liability tail lasting years after the invoice is paid. The products-completed operations aggregate has to be sized for that, and the additional insured endorsements have to match what the subcontract actually demands.

Crane, rigging, and hoisting

Lifting heavy fabricated assemblies creates severity exposure out of proportion to the size of the shop. Overhead cranes in the building, mobile equipment on site, and rented rigging each carry different coverage questions.

Coatings, blasting, and finishing

Shot blasting, painting, powder coating, and galvanizing prep introduce pollution exposure that standard general liability excludes almost entirely, plus additional fire load from solvents and coating booths.

Material in transit and staged on site

Fabricated assemblies moving from the shop to a jobsite, and staged there before installation, are outside both your property policy and the project builders risk in many cases. An installation floater is what closes that.

Coverage

What a fabrication program includes

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General Liability & Completed Operations

Premises, ongoing operations, and a products-completed operations aggregate sized for structural and installed work rather than for shop output alone.

CG 20 10 covers ongoing operations. Completed operations needs CG 20 37 alongside it. Most subcontracts require both, and many certificates show only one.
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Commercial Property

Building, press brakes, shears, lasers, plasma tables, welding equipment, cranes, and stock, with attention to fire protection matched to your actual hot work.

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Inland Marine & Equipment

Portable welders, rigging, jobsite tools, and rented equipment, plus an installation floater for material staged at the site before acceptance.

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Business Interruption

Income loss following a shop fire or equipment loss, with a restoration period reflecting lead times on press brakes, lasers, and overhead cranes.

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Workers Compensation

Fabrication and erection carry different class codes and very different rates. Payroll division has to be documented to hold at audit.

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Pollution Liability

Coatings, solvents, blast media, and waste streams sit outside standard general liability. Needed wherever finishing operations happen on site or in the field.

Minnesota Context

Fabrication in a compressed construction season

Minnesota fabricators feel the building season more than almost any other manufacturer, because their output ships to jobsites that shut down.

Seasonal revenue concentration

A disproportionate share of annual revenue ships between April and November. A shop fire in May costs far more than the same fire in January, and business interruption limits built on an annual average understate that.

General contractor requirements

Metro-area GCs impose detailed insurance specifications, including specific additional insured forms, waiver of subrogation, and primary and non-contributory wording. We read the subcontract before the certificate goes out.

Agricultural and industrial equipment work

Greater Minnesota fabricators serving ag equipment and grain handling customers pick up product liability exposure on equipment that operates around people, which changes the severity profile.

Winter field work

Cold weather welding, temporary heat, and enclosures on winter jobsites are a documented fire exposure. Underwriters ask about it, and having an answer helps.

If your crews install what you fabricate, you need a program that treats you as both a manufacturer and a contractor. That is a specific conversation and it is one most fabricators have never been walked through.

On Your Floor

What we look for in a fabrication shop

A walkthrough covers the shop and the field side both, because the field side is usually where the gaps are.

01

Hot work permitting and fire watch

Whether there is a written permit system, how long fire watch continues after work stops, and how spark containment is handled. This is the single biggest lever on your property rate.

02

Housekeeping and combustible storage

Where the cardboard, pallets, oily rags, and cutting oil live relative to where the sparks are.

03

Press brake, laser, and crane lead times

The equipment you could not replace quickly, which sets the business interruption period of restoration.

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Coating and blasting operations

Booths, filtration, media handling, and waste, which drive both the fire rating and whether pollution coverage is needed.

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The field crew and what they actually do

Setting, welding, rigging, or full installation. This determines class codes, completed operations limits, and what the subcontracts require.

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Yard storage and material staging

Finished assemblies waiting to ship, and what happens to them once they leave for a jobsite.

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Frequently Asked Questions

What fabricators ask us

Both, and the program has to reflect it. Shop operations need property, equipment, and business interruption. Field work needs general liability with completed operations sized appropriately, additional insured endorsements matching the subcontracts, and often an installation floater. Being written purely as one or the other is the most common structural problem we find on fabrication accounts.
CG 20 10 provides additional insured status for ongoing operations, meaning while the work is being performed. CG 20 37 covers completed operations, meaning after the work is finished and accepted. For a fabricator whose installed work could fail years later, completed operations is often the more important of the two, and many subcontracts require both. A certificate showing only one is a common and expensive oversight.
Meaningfully. Welding and cutting are leading ignition sources in metalworking occupancies, and underwriters differentiate sharply between shops with documented permit systems, defined fire watch periods, and disciplined housekeeping and those without. Improving this is one of the few things that lowers cost and lowers actual risk at the same time.
Not by your commercial property policy, which is written around a described premises. Transit coverage handles it in motion, and an installation floater covers it staged at the site and during installation until the work is accepted. A project builders risk policy may or may not respond depending on how it is written and whether you are named.
If you do coating, blasting, or galvanizing prep, you should look at it seriously. Standard general liability excludes pollution almost entirely, and that exclusion is broad enough to reach ordinary overspray and media escape incidents, not just major releases.
Shop fabrication and field erection are generally separate classifications with very different rates, and erection is usually the more expensive of the two. Splitting payroll requires records adequate to support the division at audit. Shops that assume the split will be accepted without documentation frequently find out otherwise.
Related Coverage & Industries

How this coverage connects to the rest of your program:

Manufacturing Overview Machine Shops & Precision Machining Medical Device Manufacturing Food & Beverage Manufacturing Plastics & Injection Molding Printing & Packaging Business Interruption Equipment Breakdown Product Liability & Recall Inland Marine
Get Your Quote

One program for the shop and the jobsite.

Most fabrication accounts are written for one side of the business and not the other. Send us your declarations and a subcontract and we will show you where the seam is.

  • Completed operations sized for installed work
  • Additional insured forms matched to your subcontracts
  • Installation floater for staged material
  • Hot work practices presented properly to underwriters
  • Class codes split between shop and field
  • Pollution exposure evaluated

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The gap is almost always at the shop door.

Fabricators get written as manufacturers, then send crews to jobsites under subcontracts nobody read against the policy. That seam is where the claims land.

Dane Roti — Options Insurance
Featured Agent

Dane Roti, CPIA

Commercial Lines Agent

When I look at a fabrication account the first thing I ask is whether your own crews install. If the answer is yes, I want to see a subcontract, because the insurance article in it usually requires things the policy does not do. Completed operations additional insured is the one I find missing most. It costs very little to fix before a job and it is unfixable after a claim.

(952) 960-8450 Email Dane
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Last updated: September 14, 2026