Our tanks come complete with a variety of appurtenances (accessories), such as:

  • Manways for roofs or tank sidewalls
  • Catwalks
  • Roof vents
  • Roof hatches
  • Nozzles
  • Roofs (flat-style, knuckle-style, or pitched)
  • Aluminum geodesic domes
  • Ladders
  • Cages
  • Step-off platforms
  • Exterior web trusses
  • Level indicators
  • Heaters
  • Baffle walls
  • Angle stiffeners
  • Spiral stairways
  • Styles over containment walls
  • Bridges for mixers
  • Down comers
  • Weirs, both internal and external
  • Insulation packages
  • Anti-vortex plates
  • Sumps

Roofs and Domes

American Structures, Inc. fabricates a variety of roofs and domes of stainless steel and aluminum up to 200 feet in diameter.  Roofs and domes are utilized on tanks and storage vessels for a variety of purposes, to include:

  • Odor and gas control
  • Protection of tank contents
  • Minimization of the “sloshing” of tank contents
  • Evaporation control
  • Contaminant protection from weather and environment
  • Access to center of tank
  • Equipment support

Designs can include: flat-style, knuckle-style, 1:12 pitch, conical, an aluminum geodesic dome or a retrofit on an existing tank. Some roofs are self-supporting, while others (typically in excess of 40’ in diameter) are column supported or a geodesic dome.

We also make stainless steel replacement roofs for coated steel structures.  There can be the standard 14’, 17’, 20’, 25’, and 31’ roofs with either 17” or 24” center openings, or can be fabricated for a custom fit.  Our roofs are designed to utilize standard hardware such as breather bag rails, hatches, vents, catwalks, and center nest rings.


Depending upon a customer’s needs, we are able to provide both concrete and stainless steel floors for our tanks. Each floor is designed to the customer’s specifications and industry standards and installed by knowledgeable, experienced crews.