PAR modules - alignment works

Dear Colleagues,

I´m working now in a yard involved in modules fabrication and assembly.
Our workshops dont´s allow full completion of the PAR´s (Pipe Racks) indoor and we need to explain, in Works instructions, how we goes to assure the correct pipelines alignment

Could anybody help me with any information about modules construction strategy or Works instruction for pipe racks fabrication&assembly?

Thanks a lot

..this would involve a lot of shims ..I believe I saw something produced by Technip :: I will try to get it if I can

Thanks, it would be very useful for me