Have a unique scenario I'd be interested in other's take on. Eight-story building with automatic standpipes and a fully-sprinklered building. There's multiple scenarios where the building is close enough to an adjacent building that the exterior wall needed to be rated. In order to keep the fire resistance rating Tyco window sprinklers were installed in conjunction with glass to provide up to a 2-hour fire resistance rating.
The issue is that the sprinkler system experiences a working pressure of up to 220-230 psi, while the window sprinklers are only available as rated up to 175 psi.
We've proposed adding pressure reducing valve to the seven floors affected by this situation, but that introduces its own issues aside from cost. We've also suggested replacing the glass with a rated glass.
Are there other alternatives we haven't explored here? Would be interested in others' opinions.
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