I'm with Al, I think
I believe you mean one of the D14 codes? Such as D14.1, D14.3, D14.4??
Are you working with heavy equipment, cranes, mills, presses, etc??
If so, D14 is becoming more and more a stand apart/alone code with many differences between it and D1.1. Especially concerning procedures and qualifications. Joint configurations that work for structural buildings are much different than joint configurations for equipment. Stresses, access, and other factors are not the same.
Have a Great Day, Brent