staircase pressurization fire rating
staircase pressurization fire rating
(OP)
Dear all,
I have a problem related to staircase pressurization system.
do we require fire rated components for this system. Some says, we don't require fire rated components, because this is a fresh air supply system and the ducting and other components are located in a protected space. Is that correct? please help me?
I have a problem related to staircase pressurization system.
do we require fire rated components for this system. Some says, we don't require fire rated components, because this is a fresh air supply system and the ducting and other components are located in a protected space. Is that correct? please help me?





RE: staircase pressurization fire rating
in my opinion, if the ductwork is crossing fire compartmentation, it definitely need a fire rated box up.
for example, if the ductwork running through a non protected area into the staircase, provide fire rated box up.
While the duct is already inside the staircase, i think it doesnt need to be with FR box up.
As staircase should be protected and should be one fire compartment by itself.
However i may need more detail of your architectural drawing on how u r running the ductwork.
I am sure your company should have reference on similar system from other projects.
Usually there will be a shaft with vertical duct with VCD (but no fire dampers are required) providing fresh air (or pressurization) to the stairwell.
RE: staircase pressurization fire rating
Where is the fan(s) and ductwork relative to the stairwell firewalls? Stairwells are generally 2-hour fire rated or better and anything that penetrates would need to be appropriately sealed and protected.
RE: staircase pressurization fire rating
RE: staircase pressurization fire rating
RE: staircase pressurization fire rating
@MEP.Learner (Mechanical)- I am practicing in Sri Lanka. This requirement has not been specified in a local code.
RE: staircase pressurization fire rating