Developed for the multi-residential and commercial markets, the Hambro girder acts as a principal beam to support the Hambro joists installed perpendicularly at regular intervals on both sides.

One of the advantages of the composite Hambro girder is that it offers greater spans than the conventional steel girder, while maintaining a minimum depth to adapt to the Hambro joist. Hambro joists run in one direction and an integrated continuous slab runs in the other. The bottom chord acts as a tension member in the concreting stage and during the service life of the floor. The web system tying top and bottom chords together consists of bent rods and resists vertical shear in a conventional truss manner. The patented 13-gauge top chord acts as a compression member during the non-composite stage. It is embedded in the concrete and functions as a continuous shear connector. The concrete slab is reinforced with welded wire mesh. The top chord functions as a high chair, developing negative moment capacity in the concrete slab which acts as a continuous one-way reinforced slab.