Final answer:
The AWS D1.5/Bridge Welding Code is the standard that contains requirements for the fabrication of steel bridges, dealing specifically with welding aspects of construction.
Step-by-step explanation:
The standard containing requirements for the fabrication of steel bridges is the AWS D1.5, also known as the AWS D1.5/Bridge Welding Code. This standard is specifically focused on the welding requirements for the construction and fabrication of steel bridges. It is important to note that while other documents like the AASHTO LRFD Bridge Design Specifications may deal with design principles and load requirements, and ASTM A709 covers the specification for the quality of the steel used, AWS D1.5 is the code that is particularly applicable to the fabrication processes involving welding of the bridge components.