LYSAGHT FIRMLOK® Light Structural Beam

LYSAGHT FIRMLOK Light Structural Beam


Product Description and Features

LYSAGHT FIRMLOK® structural beams consist of two interlocking C-sections. They are available in three sizes F10011, F15015 and F20020 depending on your application and aesthetic preference.

  • Light, strong and universal in their application
  • A range of connection types and accessories allows you to erect your project with ease
  • Uniform in quality, doesn’t warp or split, it doesn’t need painting
  • Consistent straightness simplifies alignment
  • Common Uses of this product
    Purlin and rafter applications in verandahs, extensions, carports and awnings. Economical floor solutions when used as joists and bearers.


  • Please let us know when ordering if use is intended in adverse conditions (marine, severe industrial or unusually corrosive environments)
  • Lead, copper, bare steel and green or chemically treated timbers are not compatible with this product. Contact and water runoff should be avoided.
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