4) Finishing.
Powder coat, galvanizing, plating, or specialty coatings add process steps and cost; finish type and spec level matter.
5) Logistics & Installation.
Packaging, freight, site conditions, equipment (lifts, core drills), anchorage, field welding, and travel. Shipping distance and custom packaging are recognized cost items.
6) Compliance & Admin.
Permits (if applicable), inspections, documentation, warranties—and the contract mechanics (fixed price, defined progress payments, written change orders) required by CSLB for home improvement projects.
How Big U.S. Fabricators Talk About Price
To keep this honest, here’s how three major U.S. players describe cost—and what that means for homeowners and GCs:
• Fox Valley Metal-Tech (Green Bay, WI): prices hinge on materials, labor, project complexity, certifications/compliance, painting/finishing, and delivery. This list mirrors what you’ll see in a thorough quote.
• EVS Metal (TX / NJ / NH / PA): emphasizes design for manufacturability, material choice, automation, cutting method, lean processes, and inventory to improve yield and reduce cost—i.e., smart design lowers price without cutting quality.
• Marlin Steel (Baltimore, MD): calls out material selection (and alloy price swings), tooling/setup, coatings, and shipping distance as major influences—especially important on custom one-offs or small batches.
Translation: any “flat rate per foot” you see online is usually a simplification. Complexity, finish, and installation conditions can swing the number up or down, which is why reputable shops ask good questions before quoting.
One out-of-state shop even suggests a rule of thumb that finished cost can land around three times raw sheet-metal cost—a handy sanity check, but not universal (geometry, finish, and install can move well beyond that).
A Transparent Estimating Formula
Most fabricators use a version of this:
Total = Materials + (Shop Labor Hours × Shop Rate) + (Install Hours × Field Rate) + Finishing + Hardware/Buyouts + Equipment/Permits + Packaging/Freight + Overhead & Profit
Where:
• Shop/Field rates reflect local wages, insurance, and equipment amortization.