Often in wood construction there are void spaces caused by various situations, such as the shape of a bathroom around the bathtub, odd shaped dwelling units, etc. These spaces are inaccessible and have no insulation in them. Are sprinklers required in them, and why / why not?
For context, we (me and coworkers) don't put sprinklers in those spaces because they don't have access. However, when questioned by an engineer, we are questioning the validity of using section 8.15.1.2.1 because we're not entirely sure if it's considered limited-combustible construction. Certainly the gypsum board on the studs is limited, but the wood studs themselves aren't. To help visualize, I've included a graphic. The areas in question are marked with asterisks. https://i.imgur.com/v1NIpYB.png
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