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LYSAGHT® Steal Firmlok Box Beam

Modern, steel beam in attractive colours

Exhibition in Art Gallery

Lysaght Firmlok beams are perfect in patio, carport and home addition projects.

  • 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

  • Available in three depth sizes: 100mm, 150mm and 200mm

  • A full range of accessories are available

Common Uses of this product

Purlin and rafter applications in verandahs, extensions, carports and awnings. Economical floor solutions when used as joists and bearers.

Available Colours

Technical Specifications


Lysaght Firmlok are available in the following stack lenghts: 4000mm, 5000mm, 6100mm, 7500mm and 9000mmAlternatively, Lysaght Firmlok may be ordered to length (maximum length 12000mm). Extended lead times may apply.


Material Specifications

Lysaght Firmlok are made from Next generation Zinc/aluminium/ magnesium alloy coated steel complies with AS1397-2011 G550, AM125 (550 MPa minimum yield stress, 125 g/m2 minimum coating mass).


The base metal thicknesses are 0.55, 0.75 and 1.00mm.


The pre-painted steel complies with AS/NZS 2728:2007.


Tech Specs

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