Steel Framing Systems

Millform top-hat sections (hat sections / omega sections) are roll-formed from G550 high-tensile Z275 galvanised steel strip. The trapezoidal profile delivers a high section modulus relative to weight, making them the preferred secondary structural member for spanning between primary rafters, columns and wall girts in steel-framed buildings. The 25 mm and 35 mm crown sections are used as roofing and wall battens to fix cladding to the primary frame. The 50 mm and 75 mm crown sections are used as structural purlins, wall girts and sub-frame members. All sections are pre-punched at 600 mm centres with 14 mm diameter service holes for ease of installation. Standard stock lengths are 6.0 m and 7.2 m.

Millform C-studs are lipped C-sections used as vertical framing members in light steel wall frames. Manufactured from G300 Z275 galvanised steel to AS 3623:1993 (Domestic metal framing). Available in 64 mm, 76 mm, 92 mm and 150 mm web depths with 34 mm flanges (64–92 mm) or 45 mm flanges (150 mm) and a 10 mm return lip. The 0.55 BMT grade is specified for non-load-bearing partitions; 0.75 BMT for load-bearing domestic framing; 1.15 BMT for commercial and multi-storey applications. All sections are pre-punched with 32 × 16 mm oval service holes at 600 mm centres. Standard stock lengths are 2.4 m, 2.7 m, 3.0 m and 3.6 m.

Millform U-track is the unlipped U-channel used as the top plate (head track) and bottom plate (sole track) in light steel wall frames. The C-stud slides inside the U-track to form the frame. Manufactured from G300 Z275 galvanised steel to AS 3623:1993. Available in 64 mm, 76 mm, 92 mm and 150 mm web depths to match the corresponding C-stud range. Flanges are 32 mm (64–92 mm webs) and 43 mm (150 mm web). Standard stock lengths are 3.0 m and 6.0 m.

Millform roll-formed equal angles are manufactured from G300 Z275 galvanised steel. Available in 25×25 mm, 30×30 mm, 40×40 mm and 50×50 mm leg sizes with BMT options of 0.75 mm, 1.00 mm and 1.20 mm. Used extensively in light steel framing for corner reinforcement, lintel support, bracing connections, edge trim and cladding termination details. Standard stock lengths are 3.0 m and 6.0 m. Stainless steel (Grade 304 and Grade 316) angles are available on request for coastal and food-grade applications.

Millform Z-sections are roll-formed from G300 Z275 galvanised steel and used as horizontal sub-frame members in rainscreen facade systems, spanning between vertical wall brackets or the primary structure. The asymmetric Z profile allows sections to overlap and nest at splices for continuous runs without butt joints. Available in 100 mm, 150 mm, 200 mm and 250 mm web depths with BMT options from 1.00 mm to 2.00 mm. Suitable for fibre cement, compressed fibre cement, aluminium composite panel (ACP), metal cassette and terracotta rainscreen facades. Standard stock length is 6.0 m.

Light steel framing requires a range of accessories to complete the structural system. Bridging channels prevent stud rotation under lateral load and must be installed at maximum 1.2 m vertical centres. Flat strap bracing provides diagonal tension bracing in wall frames. Hold-down brackets resist uplift at the base of studs. Stud-to-track connectors (STC clips) provide a positive mechanical connection between stud and track without the need for screws through the track flange. All accessories are manufactured from G300 Z275 galvanised steel and are compatible with the Millform 64 mm, 76 mm, 92 mm and 150 mm stud/track system.