Originally Posted by
Michael Thomas
(OTOH, it *could* be a two hour wall, which would explain why were are not seeing fire-protection on the underside of the sheeting).
Michael,
You've lost me there.
A 2 hour rated fire wall *is* required to extend 30" through the roof, or, the roof assembly must be protected to a minimum rating of 1 hour.
Which brings up another point most often missed - I referenced the roof sheathing out to 4 feet, because it is hard enough to get people to even do that, however, the IBC states "2.1. The lower
roof assembly within
4 feet (1220 mm) of the wall has not less than a 1-hour fire-resistance rating
and the
entire length and span of supporting elements for the rated roof assembly has a fire-resistance rating of not less than 1 hour."