Complete the preliminary design of the four-story library building shown in Fig. P12.5, using a beam-girder (or joist-girder) floor system. The first floor (slab-on-grade) is supported on drilled piers and serves as the reading and library services area. The upper three floors serve as stack areas (see Table 1.1). The out-to-out building dimensions are 90 X 150 ft, exclusive of the exterior facade. Columns should be spaced at approximately 30 ft in each direction. The minimum clear space between floors is 12 ft, and the floor depth should not exceed 24 in. Assume a load of 70 psf on the roof for the mechanical pent- house and a snow load of 20 psf. The building is enclosed in a self-supporting curtain wall that also carries the lateral load on the structure. The column cross sections should be maintained from floor to floor. Use f, = 60,000 psi and f = 4000 psi for the floors. Concrete with f up to 8000 psi is available for the columns. The preliminary design should include the initial dimensions of the structural slab, beams, girders, and columns for a typical floor.
Complete the preliminary design of the four-story library building shown in Fig. P12.5, using a beam-girder (or joist-girder) floor system. The first floor (slab-on-grade) is supported on drilled piers and serves as the reading and library services area. The upper three floors serve as stack areas (see Table 1.1). The out-to-out building dimensions are 90 X 150 ft, exclusive of the exterior facade. Columns should be spaced at approximately 30 ft in each direction. The minimum clear space between floors is 12 ft, and the floor depth should not exceed 24 in. Assume a load of 70 psf on the roof for the mechanical pent- house and a snow load of 20 psf. The building is enclosed in a self-supporting curtain wall that also carries the lateral load on the structure. The column cross sections should be maintained from floor to floor. Use f, = 60,000 psi and f = 4000 psi for the floors. Concrete with f up to 8000 psi is available for the columns. The preliminary design should include the initial dimensions of the structural slab, beams, girders, and columns for a typical floor.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Complete the preliminary design of the four-story library building shown in
Fig. P12.5, using a beam-girder (or joist-girder) floor system. The first floor
(slab-on-grade) is supported on drilled piers and serves as the reading and
library services area. The upper three floors serve as stack areas (see Table 1.1).
The out-to-out building dimensions are 90 X 150 ft, exclusive of the exterior
facade. Columns should be spaced at approximately 30 ft in each direction.
The minimum clear space between floors is 12 ft, and the floor depth should
not exceed 24 in. Assume a load of 70 psf on the roof for the mechanical pent-
house and a snow load of 20 psf. The building is enclosed in a self-supporting
curtain wall that also carries the lateral load on the structure. The column cross
sections should be maintained from floor to floor. Use f, = 60,000 psi and
f = 4000 psi for the floors. Concrete with f up to 8000 psi is available for
the columns. The preliminary design should include the initial dimensions of
the structural slab, beams, girders, and columns for a typical floor.
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