Recycled aluminum products used in construction projects must meet specific requirements to ensure safety, durability, and compliance with building codes. These include adherence to ASTM standards for recycled aluminum alloys, such as ASTM B601 for ingots and ASTM B209 for rolled or cold finished products. The recycled aluminum must also have consistent mechanical properties and corrosion resistance comparable to virgin aluminum. Additionally, the products should be free from contaminants that could compromise structural integrity. It's crucial to verify the source and processing methods of recycled aluminum to ensure it meets these standards before use in construction.