Thanks. It seems such glazing was common in American 1970's era construction as a way to evenly distribute across the pane and into the frame the heat from a fi

Thanks. It seems such glazing was common in American 1970's era construction as a way to evenly distribute across the pane and into the frame the heat from a fire on one side of the window. This extends the time before the glass shatters, which once shattered allows flames/smoke through. It has commonly been misunderstood to be "stronger" glass, an overloaded term that might have some applicability to fire resistance, but has given people the wrong idea about impact resistance. Glazing with embedded wires is much less impact resistant whilst also posing additional safety risk to humans impacting the glass. When humans attempt to pull themselves out of glass they've impacted, the wires hold sharp glass shards in place causing even more severe injuries.[1] It looks like all adjoining offices on the exterior of the building are single fire zones, with stairwells at either end of each zone. Internal offices seem to be divided into fire zones too (e.g. 6x2 rooms as a single zone) with use of the odd internal slab-to-slab wall that would possibly be fire resistant. [1] https://www.youtube.com/watch?v=x6Lmwl7y-9M https://www.youtube.com/watch?v=x6Lmwl7y-9M