The IBC does not have inherent legal jurisdiction. It is a model building code which is adopted (or not) by government bodies and modified to suit the needs of that government. That said, it generally is meant for building and related structures on land, but can include shoreline structures as part of a general government building code.
What are you designing?
"It is imperative Cunth doesn't get his hands on those codes."
Thank you MacGruber22 (Structural) for your response.
I've been asked to design the connect of an enclosure (40 ft long, 22 wide and 8feet high) as a locker room on top of dock barge tied to the river bank.
Is IBC applicable?
Any other code standard or cookbook you know of for this case?
Thank you
It depends on the locale where the structure is serving the public, If possible, you should consult the local government. I am guessing this floating building is not in the USA? Maybe there is no local building code?
"It is imperative Cunth doesn't get his hands on those codes."
Since its Illinois, also make sure you have the proper licenses. You'll need an SE to practice structural engineering there. They have practice limitations and PEs can't do structural work. At least that's my understanding
Search for maritime standards for living quarters. Might be some oil rig stuff out there.
Use good engineering practice.... ASCE 7 seems like a good start for the structure. Then whatever it is made of: AISC for Steel, ADM for Aluminum, etc.
