Most of the common 6061-T6 Aluminum Angle AA061 4in on the market is produced through industrialization, automation, and mass processing. Through the extrusion of aluminum rods, various aluminum alloys with the same cross-sectional shape and different lengths are produced. Profiles.
This characteristic of the profile requires that during production and processing, aluminum alloy doors and windows cannot be assembled through a mortise and tenon structure like wooden doors and windows. Instead, certain accessories must be used to assemble the doors and windows at the corners. Various aluminum alloy profiles have different cross-section methods, so the methods of corner assembly are also different.
link:https://www.alufoil-china.com/aluminum-beams/6061-t6-aluminum-angle-aa061-4in.html