There should be a wire support at the end of each shelf. There should be a wire support every 3 inches. There should usually be 2 wire supports and a bookend on every shelf. Bookends are used on top shelves where wire supports can't be used. The book should be shelved on its side on the shelf.
All oversize books go at the end of all the other books at that call number, shelve it there.
All oversize books are shelved in call number order in a special section before Michigan Documents, shelve it there. Leave it on the sorting shelf and a supervisor will take care of it. Just put it back on the sorting shelf and wait. Try to shove it in somewhere. Ask Olivia what to do.