All single Unistrut® Channel members are accurately and carefully rolled from strip steel to AS 1594 and AS 1365. Spot-welded combination members are welded 75mm (maximum) on centre. Some members may require fillet welding.

Material Thickness

The thicknesses of the various channels are as follows:
P1000® – 2.5mm
P2000 – 1.6mm
P3300 – 2.5mm
P4000 – 1.6mm
P5500 – 2.5mm
Engineering properties may vary slightly due to commercial tolerances.

Framing Members

Channels and continuous inserts are accurately and carefully cold formed to size from low carbon strip steel. The channel has a continuous slot with inturned edges. Secure attachments may be made to the framing member with the use of hardened, toothed, grooved nuts which engage the inturned edges.

Masses and Dimensions

Masses given for all material are approximate shipping weights. All dimensions subject to commercial tolerance variations.

Standard Lengths

Standard lengths of the above channels are 6m. Facilities are available to cut standard lengths into any special lengths for a small cutting charge.

Section Shape

The roll forming process used by UNISTRUT AUSTRALIA produces a consistent channel within the manufacturing tolerances allowed. The process induces stresses within the section itself which are released when the channel is cut. This creates a common condition known as “Bellmouth” where the section deforms slightly for a small distance in from the end.


The fittings, unless noted otherwise, are punch press formed from low carbon steel plates or strip.

Channel Nuts

The nuts are produced from steel bars and after all manufacturing operations are completed, zinc plated nuts are case hardened. They are rectangular with the ends so shaped as to permit a quarter turn crosswise in the framing member after inserting through the slotted opening in the channel and to prevent any further turning of the nut. Two serrated grooves in the top of the nut engage the inturned edges of the channel and, after bolting operations are completed, will prevent any longitudinal movement of the bolt and nut within the framing member. All bolts and nuts have ISO metric coarse screw threads.