Product Description and Features

Perfect for use in patio, carport and addition projects and available with a range of connector brackets offering simple design and installation.

  • Available in three depth sizes – 100mm, 150mm and 200mm
  • Light, strong and universal in their application
  • Doesn’t warp or split
  • Doesn’t require painting

FIRMLOK® also has an application as a structural flooring system for a single level application for flat or sloped foundations.
The floor system consists of bearer and joist in the same plane where the tops of joist and bearer are flushed. The joist ends are
connected to the webs of the bearers.

Go to the Downloads section to find specification and installation instructions.


LYSAGHT FIRMLOK® may be ordered to length (maximum length 12000mm). Extended lead times may apply.

Material Specifications

LYSAGHT FIRMLOK® beams are made from Next generation ZINCALUME® aluminium / zinc / 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 COLORBOND® prepainted steel complies with AS/NZS 2728:2007.


Colour Range

Colour Range


LYSAGHT FIRMLOK® Beams Quick Selection Tables for Home Improvements

Lysaght FIRMLOK® Flooring System