750
Cost and Time Analysis
751
FIRST COST
751.1
EXAMPLE BUILDING SCHEMATIC DESIGN
751.1.1
The cost estimate for the example building schematic design (Section
730) is based on material and labor costs prevailing in the San Francisco
Bay Area with the national ENR Building Cost Index at 960. All figures
include the general contractor's and subcontractor's overhead and profit.
The estimate is for the entire building to a point five feet beyond the
building line, except for the figures for central plant and laundry, which are
not in the example schematic design, but have been added to make the
total comparable in scope to the cost base (the six hospitals analyzed in
Section 530). The outside gross area of the example schematic design is
approximately 843,000 square feet. (See Table 750-1.)
751.1.2
Structure, exterior wall, ceiling, fire partition and corridor partition
quantities were measured on the plans. Other partition quantities were
based on the average functional area quantities of the Miami and
Memphis field stations. (See Section 534 for explanation of functional
area breakdown.) Mechanical, plumbing and electrical costs were based
on functional area take-offs, with unit prices established for each type of
functional area. Items such as casework, conveyors, hospital equipment,
lighting, communications and building specialties were prorated from the
Miami and Memphis analyses.
751.1.3
Direct comparison of the total unit cost of the example schematic design
(.79) with the basic construction cost established in the cost base
(.60) could be misleading because the example schematic design has
a higher gross-to-net-area ratio than is typically the case in VA hospitals.
The additional gross area is in the more generous service spaces and
shafts, and in "incremental" assignable space introduced by the use of
large-scale planning modules. (The latter type of space is not really gross,
but is in addition to "programmed" net.)
The exact gross-to-net ratios for the six hospitals analyzed in the cost
base were not calculated, but based on VA standards current at the time,
these ratios probably average about 1.6. The equivalent ratio for the
example schematic design is 1.9.
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