Fully-Welded Solid Hot-Rolled Steel series


Optimum’s steel window and doors offer reliability and versatility. These characteristics are key when designing a project. This series has been used in countless applications ranging from high-end homes to commercial and industrial applications. One major quality associated with our units is their narrow sightlines. Architects have incorporated this attribute in all aspects of building for over a hundred years, and have designed the gracefulness of steel windows into countless applications. The look is not simply distinctive, it is unique.
  • Zinc Rich Epoxy primer with Electrostatically applied, colored, polyester powder coated finish.·Meets AAMA 2604 specification.
  • Integrated system complete with sections, fittings and gaskets/seals for designing and making the largest types of thermal break window and door frames.
  • Recycled Carbon Steel material.Fully Welded construction.
  • Beveled Profile. Operable units available in Outswing only.
  • Slender yet structurally solid sections make for increasingly elegant and bright frames, curtain walls and façades.
  • Possibility of making regularly-shaped arches to customer template.
  • Accommodates thin sight line look for historical applications high performance in terms of energy saving and sound insulation.


  • Meets or exceeds air infiltration test criteria in accordance with ASTM E283
  • Meets or exceeds water penetration test criteria in accordance with ASTM E331
  • Meets or exceeds structural test in accordance with ASTM E330

Contact Optimum Window to review applicable testing and design performance data for your specific project

Standard profiles






(Glazing Beads will vary depending on OA Glass Thickness.)

Available Systems

Princeton SERIES

Fixed window

  • Solid Hot-Rolled Sections
  • ANSI/AAMA 101-93 HC40
  • 1 7/8” exterior frame depth
  • EPDM weather-stripping
  • Mitered, welded frame and sash construction
  • Uniform sight lines
  • 3/16” to 1” glazing infill
  • Standard Optimum Window colors (refer to OWM color chart)


  • RAL colors available as option
  • Non-metallic color matches are optional & available upon request
  • Steel brake metal and trim

Min. Dimensions

10″ x 10″

Max. Dimensions

60″ x 120″

OWM may exceed shown maximum dimensions. Contact an Optimum Window Consultant for further information.

Princeton 372 West 11th St new
Princeton Fixed Unit 293 Lafayette new
Princeton Windows Mercer new
Princeton 372 West 11th St new
Princeton Fixed Unit 293 Lafayette new
Princeton Windows Mercer new