As long as the hatch cover is 5/8 type X gypsum, it’s all good. On the other hand if it’s a wood product, then that is IMO considered a void in the firewall.
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Kevin, I believe that 1/2" is adequate when no habitable space above the ceiling.
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Pull down wood stairs at garage is what I hate, especially old ones.
I guess you haven’t seen those in your area either Jacob?
I hate those also,Christopher. I try to use my own small telescoping ladder if I can.
You’re right Marcel, I stand corrected.
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I liked to call out scuttles where drywall is held up by puny door casing…LOL
You mean there is a different way
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I agree Marcel!
I liked to recommend 6" x 12" Glulams. LOL