Reply to "Fire Resistance Rating of a proposed design"

Thank you for your expertise, time and suggestions.

I have seen the WP 3820 generic system you referenced.  If only the facing surface helps, I don't know why the 1" gap in the middle is relevant.  It would seem the gap could be replaced with anything, or eliminated.

Does pretty much any solution with double 5/8" on the exterior qualify as 2hr, but not much else?  I don't understand how U360 rates as 2hr.  Can you explain that? See the additional attachment.  

Thanks again.

Attachments

Photos (1)
×
×
×
×
×