Hi @algonquin ,
Does your work have a copy of the 2018 IBC Code Commentary? If so, this would be the first place I would look for more information on Group H. The code commentary is a version of the building code the International Code Council puts out that includes additional information and instruction about individual code sections. Most work places have a copy as it is a valuable resource!
“Building Codes Illustrated” is also a good read for many code related topics. I looked into it and it doesn’t have a wealth of information on Group H, but it is a good resource to have in general for code questions.
Let us know if you have any specific questions about Group H Occupancies and we will do our best to assist!