Concrete Floor System

Concrete Floor System

The main objectives of this publication are to
assist in the selection of the most econom-
ical cast-in-place concrete floor system for
a given plan layout and a given set of loads
Provide a preliminary estimate of material
quantities for the floor system; and
Discuss the effect of different variables in the selection process.
Five different floor systems are considered in
this publication. These are the flat plate, the flat
slab, the one-way joist, the two-way joist or
waffle, and the slab supported on beams on all
four sides. Material quantity estimates are
given for each floor system for various bay
sizes.cost ia because ofi-kc buildings are designed
with more open spaces which in structural terms
means costlier, longer clear spans.

The total cost to construct a building depends on
the use for which the structure is designed, the
availability of qualified contractors, and the part
of the country in which the structure is built.
Figure 1 gives cost comparisons for two differ-
ent types of uses over the past several years.
(The data presented in Figures 1 through 5 and
Table 1 were obtained from Means Concrete
Cost Data, 1990.) ‘Ilte average price per square
foot is considerably greater for office buildings
than for apartment buildings.The majority of the structural cost of a build-
ing typically is the cost of the floor system. This
is particularly true of low-rise buildings and
buildings in low seismic zones. Therefore, it is
imperative to select the most economical floor


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