The wall thickness of door and window aluminum profiles should be produced in accordance with international standards.  

The wall thickness of the window door aluminium profile is in line with the current national standard of high precision, and the minimum wall thickness of the stressed component is ≥1.4mm.  

Doors and windows force rod (such as push and pull window light link enterprise, middle column, with bright slide, with bright slide, double edge, etc.) must be carried out strict compression calculation, profile as force rod, its profile wall thickness should be based on the conditions of use, selected by calculation.  

Stress components of aluminum alloy doors and windows should be determined by test or calculation.