Islands Forms

Riverside Steel permanent steel island forms are fabricated from high quality 12-gauge steel. Unsurpassed dimensional accuracy is provided by precision roll formed sections that are radiused in state-of-the-art CNC equipment. All knocked-down sections are supplied with our interlocking flange system for the best fit in the industry.

Materials Available

  • Carbon Steel
  • Galvannealed Steel
  • Stainless Steel (304 & 316)

Key Features

  • Full 1.25 inch bead at the top of the form
  • 9 inch or 13 inch tall forms
  • Industry exclusive lower flange for additional strength
  • Internally welded brackets the same material as the external island
  • Additional brackets in stainless steel islands to minimize the weld spots
  • Adjustable cross rods for mounting items in the island

Illustration of Island Form joint detail

Detail of male/female interlocking flanges


  • 1 Piece island with a single welded seam
  • 2 Piece island with flanged seams on the ends
  • Multi-piece knocked down forms for any size
  • Bowtie Style
  • Dogbone Style
  • Barbell Style
  • Welded Bumpers
  • Curbing
  • Tapered islands


  • Gas Station
  • Car Wash
  • Bus Station
  • Airports
  • Electric Chargers

Custom sizes are available, please call for a details.

Download pdf here.

Stainless Steel Island FormPainted Island FormIllustration of corner configurations for Island Forms
Bowtie Style Island Form illustration with detailsDogbone Style Island Form illustration with details
Illustration of top and side views of Island Form