On Jan 21, 11:11*am, wrote:
Hello there, I am putting in a drywalled ceiling in my basement. *I
had to use 5/8" drywall as fire-blocking between the stud wall and
foundation, but planned on using 1/2" drywall for the actual main
ceiling since my joists are close enough together to allow that.
However, I read on this forum that 5/8" rock might be required for
fire protection for the main ceiling, by code. *Since I am doing this
with the proper inspections, can anyone shed light on this? *Is it in
the national building codes, or is this a one-off requirement of some
jurisdictions? *Thanks.

In chicago 5/8 fire code X is required, there are other types of 5/8
but HD carries Fire Code X here. Call the building dept. Do it wrong
and they will make you remove it.