Fire-stopping Draft-stopping CMU/Frame Construction

[Tampatundra]

Please take a quick look at the two pictures I've attached.

Subject: 2 story new home construction (Florida) with CMU first level, Framing second level

Do you see anything wrong with either picture?

The horizontal 1x4 furring strip on the 1st floor (CMU wall) is attached on top of the RMAX foam insulating board. Is this acceptable for fire blocking or draft stopping.
The horizontal 2x4 furring strip on the 2nd floor (Frame Construction) is attached directly to the studs and the RMAX is under the furring with additional furring running vertical.

I am unable to find the code reference that specifically details the requirement, if any, for fire-stopping or draft-stopping for this particular scenario.

Any assistance will be greatly appreciated.

Fire1sm.JPG

Fire2sm.JPG

[Jerry Peck - Codeman]

[Tampatundra]

1. Is the downstairs block construction considered combustible construction?
2. Can the drywall serve as the fire blocking? Normal 1/2" Gypsum Drywall

What I'm inferring from your response is that RMAX foam board insulation is not a listed fire blocking material, and therefore the horizontal furring should be attached directly to the block/CMU wall to provide the necessary fire blocking required. (side note: RMAX does make a fire rated foam board insulation, but for this application, is not that type)

As for the floor truss: good eye there! I did not catch that. The installer properly attached the shim to the engineered truss.

Your response would be appreciated. Thank you

[Jerry Peck - Codeman]

[Tampatundra]

Jerry,

Thank you again, for your quick and thorough response. It is much appreciated.

In conclusion, regarding the horizontal furring on CMU construction:

Picture 1 shows the RMAX installed against the CMU wall, and the horizontal 1x4 furring installed on top of the RMAX. Is this a code compliant installation? Or, does the horizontal furring need to be installed onto the CMU wall, and the RMAX up to the bottom of the 1x4 furring?

"the draftstopping referred to in the code statement is the concealed space" But, the concealed space is filled with the RMAX foam board insulation (in the example whereby the RMAX is installed on top of the RMAX.

Thank you.

[Jerry Peck - Codeman]