Aluminium Profile Cad =link= Download
If you don't care about a specific brand and just need a generic 40x40 or 20x20 profile, these aggregators are your best bet.
For architects using Revit or engineers using cloud PLM, the static download is evolving. aluminium profile cad download
Offers an advanced online configurator. You can download individual structural profiles or complete framing modules tailored to specific mechanical loads. If you don't care about a specific brand