They pay an engineering firm, usually civil or architectural, to draw up plans and bid specs. Generally both are physically not implementable or not Code. They write the regulations to require licensed professional engineers to do all
In fact most bid specs are written by someone that thinks they are writing a spec for a coffee maker. And the plans are written by someone that graduated with an English degree that just reads Codes and spits out pure utter garbage, So before we even get started you have to either submit questions to make them fix the spec or bid as is then change order it and help them beat the tar out of the engineers until they get it right then change order it.
I had posted this sometime back but could not find it in a search. I hope it's good for a laugh or two.
In the Beginning was The Project, and The Project had The Spec.
The Spec was with The Senior Engineer,
And The Senior Engineer saw that it was Good.
All Proper Things were in The Spec, and there was nothing
Outside The Spec that was Proper.
And The Spec said, "Thy ground ring conductor shall be 2/0,
and no size smaller shall be Proper."
And so it was, and it was Good.
It came to pass that a Junior Engineer was tasked with Another Project,
And he strove mightily against The Deadline.
In his despair, he cried out to The Senior Engineer;
"The EC's are rebellious! Lo, they clamor for Knowledge
on every detail and I am sore pressed to answer them!"
And The Senior Engineer said; "Fear not! For see, I have The Spec,
and herein shall you find what you seek."
And doubt entered the heart of The Junior Engineer, and he said;
"Is this not The Spec from another Project? Will it suffice?"
And The Senior Engineer said; "Well mayest thou calculate every
Trivial Quantity and watch thy Project Manhours flow like a river
in flood and thy Profit Margin dwindle away. Or takest thou
The Spec and brandish it before the rabble."
And The Junior Engineer said; "Meh, good enough."
And so The Spec became The Boilerplate, and was handed down
from The Senior Engineer to The Junior Engineer, and when The Junior
Engineer passed to Senior status, so did he likewise pass it to
the next generation. And so it has been, and so shall it be,
until the end of Time.