What is the base metal and what is your application?
Consider:
AWS D1.1 Structural Welding Code/Steel for carbon steel,
AWS D1.2 Structural Welding Code/Aluminum for Aluminum
AWS D1.6 Structural Welding Code/Stainless Steel for austenitic stainless steel.
AWS D17.1 for aerospace structural components
AWS has other standards for structural sheet metal, earthmoving equipment, mill cranes, material handling equipment, etc. That's why I asked about the application.
"All welding, including welding procedure specifications and welder qualifications, shall be in accordance with AWS D1.X Structural Welding Code/XXXX" The "X" would be substituted with the proper code and base metal. You should include a specific year for the code you select. You can get that by going to the AWS web site. You should also state whether the bracket is for a static or cyclicly loaded structure.
Good luck - Al
Best regards - Al