Robert Saunders
07-12-2011, 08:15 AM
I need a one hour separation wall for a studio apartment I'm adding in a former garage. There's a room between the studio and the existing house, so I can sheetrock both sides of this wall easily with 5/8 firecode sheetrock. The fire separation wall is non-bearing. It's only 12' between the exterior walls.
My question is how to get the fire separation sheetrock into the cavity between the roof rafters. It's a shed roof with 2x8 rafters that are parallel to the fire separation wall, but this wall falls in between the rafters (2' o/c rafters, about 10" from one side). The studs could go up to the roof sheathing, but I don't see how to frame it solidly.
a. I don't want to put a 2x4 against the sheathing to nail to because its only 3/4" with a metal roof on the outside and I'm nervous about puncturing the roof.
b. If I put 2' nailers between the rafters and attach the studs to that, the nailers penetrate the firewall.
c. I could put 2' nailers laid flat just under the roof sheathing, but I still have a penetration.
d. ????
Number c. seems best so far, but does this meet code for separation? Is there another way to do it.
Thanks,
Bob
My question is how to get the fire separation sheetrock into the cavity between the roof rafters. It's a shed roof with 2x8 rafters that are parallel to the fire separation wall, but this wall falls in between the rafters (2' o/c rafters, about 10" from one side). The studs could go up to the roof sheathing, but I don't see how to frame it solidly.
a. I don't want to put a 2x4 against the sheathing to nail to because its only 3/4" with a metal roof on the outside and I'm nervous about puncturing the roof.
b. If I put 2' nailers between the rafters and attach the studs to that, the nailers penetrate the firewall.
c. I could put 2' nailers laid flat just under the roof sheathing, but I still have a penetration.
d. ????
Number c. seems best so far, but does this meet code for separation? Is there another way to do it.
Thanks,
Bob