Spread of Fire and Ply Diaphragm Continuity Through Intertenancy Wall
Spread of Fire and Ply Diaphragm Continuity Through Intertenancy Wall
(OP)
An architect brought up a really good point to one of my details.
The issue is they claim the fact that the plywood diaphragm continuous through the IT wall, then when a fire catches on one apartment, the plywood floor with catch fire and perpetuate fire through the ply diaphragm and fire will then enter the neighbouring apartment. They want to cut my ply sheathing between the two units, now I effectively have two separate buildings.
I feel this "spread of fire" issue is real... how do you get around this? I can't have little separate diaphragms on this buildings, what is the detail to keep fire from spreading across and respect diaphragm action at the same time?

The issue is they claim the fact that the plywood diaphragm continuous through the IT wall, then when a fire catches on one apartment, the plywood floor with catch fire and perpetuate fire through the ply diaphragm and fire will then enter the neighbouring apartment. They want to cut my ply sheathing between the two units, now I effectively have two separate buildings.
I feel this "spread of fire" issue is real... how do you get around this? I can't have little separate diaphragms on this buildings, what is the detail to keep fire from spreading across and respect diaphragm action at the same time?






RE: Spread of Fire and Ply Diaphragm Continuity Through Intertenancy Wall
RE: Spread of Fire and Ply Diaphragm Continuity Through Intertenancy Wall
Regarding the shear transfer through the floor, I can't find literature which would suggest this is a fire-risk to the apartment on the other side of the IT wall. Anyone have experience with apartments and fire separation or know literature to explore these details?