530
Cost Base: Description of Hospitals Studied
532
DESCRIPTION OF HOSPITALS STUDIED
532.1
STUCTURE
532.1.1
General
There is no use of pre-cast, pre-stressed or post-tensioned construction in
the hospitals, although there is a limited use of pre-cast tees for large
spans (chapel and auditorium) at Miami and a considerable use of pre-
cast and non-structural exterior wall panels at both Miami and Memphis.
The highest cost concrete frames occur in the two California hospitals
because of the seismic force resisting elements, in spite of the fact that
they are rather low buildings.
Establishing a cost for shear walls posed a special problem because it is
impossible to tell, from an examination of working drawings, which
concrete walls in a particular building were considered by the structural
engineer to be acting as shear resisting elements in his calculations.
Estimating therefore proceeded on the following assumptions: the
structural concrete of any exterior wall which could transfer shear was
counted 100% as structure. Any interior concrete walls, which enclosed
the same type of spaces as are to be enclosed by the shear walls of the
Prototype Design, e.g., stairwells and mechanical rooms, were counted
100% as structure. Interior concrete walls enclosing other types of spaces
were assigned 50% to structure and 50% to partitions.
532.1.2
Miami, Florida, VA Hospital
This hospital consists of twelve floors plus basement and pipe basement
and a two-story penthouse. The nine nursing floors are in a tower with
characteristic bays of 16'10" x 24'10". Floor heights are 11'8" floor-to-
floor. Pan joists span the short dimension of each bay, supported by flat
beams of equal depth (12" plus 2-1/2" slab). The structural floor is 1-1/2"
below the finished floor, the difference allowing for recessed tile, filled with
light-weight concrete. This has the smallest structural bay of any of the
hospitals studied and is one of the most economical in structure. The
concrete topping, although adding weight and cost to the structure,
undoubtedly reduced the cost of labor and formwork required for the many
floor recesses.
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