Double 5/8" type X on garage ceiling?

[lkage (Larry Kage, CMI)]

@mcyr

Larry, if the intent is to achieve a 1-hour rated construction, there are multiple ways of achieving it without the use of two layers of 5/8" gypsum.
Look at the ceiling and floor construction here and chose the 1-hour protection that applies and required.

http://www.usg.com/content/dam/USG_Marketing_Communications/united_states/product_promotional_materials/finished_assets/usg-fire-resistant-assemblies-catalog-en-SA100.pdf

Thank you, Marcel.

It was good talking to you.