Simpson and other manufacturers make connections create concealed beam hangers for Glulams that are fire-rated. https://www.strongtie.com/miscconnectorsforengineeredwood_engineeredwood/cbh_hanger/p/cbh
However, it is unclear if it is necessary to caulk the joint between the beam/column or beam/beam. It seems to be based on jurisdiction / engineering judgement (and theoretically, would be in scope of the architect to determine - but in mass timber fire has a more direct structural impact thus it's becoming more important for engineers to be involved in rating discussions).
I'm curious what resources anyone here points to to justify the need or lackthereof of caulking at these connections?
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