A single firefighting lift shaft
and stairwell serves the upper floors of the tower with automatic opening
vent protection on each floor and protected hallways within each
apartment. Lobby separation and door alarms protect and separate the hotel
use from the shared alternative means of escape stairwells. An efficient
7.5m steel-framed structural grid is proposed for the north and south
wings with the reinforced concrete cores formed ahead of the frame
erection. Each 7.5m grid accommodates 6No. car spaces at sub-basement
level and 4No. hotel rooms on the upper floors. The majority of the net
lettable floor areas and the service cores conform to these simple,
orthogonal structural grids to provide an efficient and economical
structural solution. The upper stages of the tower and the curved prows of
the north and south wings are supported and braced by rigid reinforced
concrete cores with either concrete and/or steel-frame extensions forming
the required profiles. |
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