Auto-gauging: mixed thicknesses

What auto-gauging does

The roller stations of a cold-forming line are set up for a given sheet thickness. If the material changes, conventional logic says the machine has to be reset. The auto-gauging system of the F-series does this automatically within the range the manufacturer states, 0.55–1.20 mm: the forming stations follow the thickness themselves.

For the F325iT the manufacturer states 10 auto-gauging forming stations and 12 hydraulic and punching functions.

Why this matters to the designer

The loads in a light gauge steel building are very uneven. The end stud of a ground floor load-bearing wall, the jamb beside an opening and a section of upper-floor partition carry forces that differ by orders of magnitude. If the machine could only work with a single thickness, the designer would have two bad options:

• Size everything to the most loaded member. It works, but the surplus steel is there throughout the building — exactly the over-sizing on which an optimised design saves the most.
• Space the members closer. More studs at smaller centres: more parts, more screws, more erection time, and less room for insulation in the build-up.

With mixed thicknesses the steel goes where the structural analysis asks for it.

What has to be done in return

Mixed thickness is only worth anything if the marking and the erection discipline are in order. A 1.0 and a 1.2 mm section look the same; if the installer swaps them, the load capacity of the design is not achieved, and this is hard to spot afterwards. That is why part marking in production is not administrative decoration but a structural matter.

The other condition is design discipline: the change of thickness has to come from the structural model, not from a feeling. Where the engineering is not done member by member, mixed thickness only adds risk, not benefit.

The point

Auto-gauging is not a speed feature but design freedom: it is what allows the steel to go where the load is. The saving is not made on the machine but at the drawing board.

Sources

FRAMECAD F325iT product page and the F-Series Operating Manual (Knowledge Hub), retrieved in September 2026.