Fire Rating

[dik]

I'm looking for a method of providing a two hour fire separation by laminating type X (fire rated) gypsum wallboard to a sheet metal liner panel The fasteners have to go from the drywall surface to the liner panel, but cannot project as a sharp point through the liner panel.

Is anyone aware of a heavy fastener similar to the square headed (2x2 approx) 'nail' that is similar to those used to attach rigid insulation?

Is anyone aware of an adhesive that would maintain the fire rating?

Dik

 

[BAretired]

I don't believe you can get a 2 hour fire separation by laminating gypsum wallboard together. The maximum is 1.5 hours (D-6.4).

BA

 

[dik]

From CGC for shaft wall construction...

Fire Protection
In the event of a fire, mechanical shafts and stairs are vital channels for communication, power, water, air, exhaust
and egress—making the shafts the lifelines of the building. Since it is critically important that these walls protect
occupants and necessary services from fire, USG shaft wall systems have been tested for fire endurance.
The primary attribute of USG shaft wall systems and its components is fire resistance. Testing supporting this
attribute ensures that this critical performance component will not be compromised when properly installed.
This fire testing results in the following:
– UL Classification of all gypsum panel components
– UL fire-resistance Classifications for one to four hours
– UL system testing with all major elevator door manufacturers
– UL listing for fire damper installation
– Fire test data for electrical panels, call-button boxes and other interfaces
– UL listing of shaft wall head of wall
See the Good Design Practices section for more information on fire resistance.