Demolition started off slowly at first as a result of the unique construction method used on the 11th floor, which was a plant room, and the 12th floor which was stronger than other floors because of the roof slab.
32.
The difference was due to the fact that the brick walls finished in line with the top of the roof slab, covering the fascia, whereas the concrete walls finished at the soffit of the roof slab, flush with the fascia.
33.
The difference was due to the fact that the brick walls finished in line with the top of the roof slab, covering the fascia, whereas the concrete walls finished at the soffit of the roof slab, flush with the fascia.
34.
The concrete gallery partitions, 16 inches or 24 inches thick depending on location, support the weight of the second story and most of the weight of the concrete roof slabs _ actually, they Are trays, with roof drainage enclosed in the interior walls.
35.
Although all floor slabs are level, the roof slab is framed with an integral slope so that it pitches downward gently from a uniformly high level at Central Park West and West 86th Street sides to a low level along the inner court sides and also downward from the south end of the west wing to a valley along the court walls.
