Key Points for Selection and Design of Aluminum Alloy Profiles

Section Design:
- Hollow structure for weight reduction while ensuring bending resistance (e.g., design of door and window insulation strips).
- Avoid sharp corners to prevent stress concentration.
Connection Methods:
- Bolted Connection: Steel inserts need to be pre-installed to enhance local strength.
- Welding: Suitable for 6xxx series, but protection gas is required (e.g., MIG welding).