Typically, the production of retractable awning frames involves aluminum extrusions. Extrusions made of such production materials are robust. They can withstand strong wind and keep your retractable patio awning in place. I recommend that all arm parts under stress are made of forged 6063 aluminum, including the shoulder, elbow, and arm components. Forged 6063 aluminum arm components including castings and extrusions are superior and much stronger than all die castings and extrusions, resulting in a significantly stronger retractable awning against the elements. All components used for assembly should be marine grade 316 stainless steel.