Footer, thanks, ours is Zetex as I recall.
Ours is a also a mid-50's design, counterweighted and motorized, with a leaking and now deactivated motor. Thus it stays out - hopefully. as otherwise no way to raise it.
As we are currently going through spasms of updates to the assorted fire alarm systems, they are planning a motor replacement with trip mechanism tied into the alarm system, so as to bring all up to code.
Fortunately the engineers fully understand that the curtain is much preferable to a deluge. We are on edge about this as there's seemingly a NYC code that declares that if the distance from floor to bottom of a certain grid point is less then 50 ft, out comes the curtain, in goes the deluge, which is what they did on our smaller space next door getting renovated. That space had a grid the same height as the larger hall, thus we pray and give sacrifices weekly to the alarm gods.
Ours is a also a mid-50's design, counterweighted and motorized, with a leaking and now deactivated motor. Thus it stays out - hopefully. as otherwise no way to raise it.
As we are currently going through spasms of updates to the assorted fire alarm systems, they are planning a motor replacement with trip mechanism tied into the alarm system, so as to bring all up to code.
Fortunately the engineers fully understand that the curtain is much preferable to a deluge. We are on edge about this as there's seemingly a NYC code that declares that if the distance from floor to bottom of a certain grid point is less then 50 ft, out comes the curtain, in goes the deluge, which is what they did on our smaller space next door getting renovated. That space had a grid the same height as the larger hall, thus we pray and give sacrifices weekly to the alarm gods.