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Notes regarding reinforcement details.
In the following problems, the reinforcement details are compressed to clarify the problem solutions. The
reinforcement details are noted by the line:
Reinforcement details
Reinforcement is shown by bar size. Thus a No. 9 (No. 29) bar is As9. Expansion of the "Reinforcement
details" line gives all bar sizes and diameters, thus:
Reinforcement details
Area of Reinforcing Bars
Diameter of reinforcing bars
1.1 The building in figure P.1 is used for general office space. The slab is 8 in. thick on a beam
12 in. wide by 18 in. deep, the bay dimensions are 18'-6” in the x direction and 21'-0” in the y
direction and the superimposed service dead load is 12 psf. Calculate the slab service load in psf
and the beam service load in klf.. (Solution: qs = 162 psf, wu = 3.12 klf).
SOLUTION
1.2 The building in figure P.1 is used for general office space. The slab is 8 in. thick on a 12
in. wide x 18 in. deep beam, the bay dimensions are 18’-6” in the x direction and 21’-0” in the
y direction and the superimposed service dead load is 12 psf. Calculate the factored column
load transferred to column C3 on the 3rd floor. (Solution: Pu = 86.4 kips).
SOLUTION γc150pcf ql50psf qsdl 12psf
1.3 The building in figure P.1 is used for general office space. The slab is 8 in. thick on beams
12 in. wide x 18 in. deep, the bay dimensions are 18’- 6” in the x direction and 21’- 0” in the y
direction and the superimposed service dead load is 12 psf. Calculate the slab factored load in
p
sf and the beam factored load in klf. Comment on your solution in comparison with problem
1.1.
γc150pcf ql50psf qsdl 12psf
SOLUTION
1.4 A slab in figure P.1 is used for lobby space. The slab is 10 in. thick on a 14 in. wide x
24 in. deep beam, the bay dimensions are 21’- 0” in the x direction and 26’- 0” in the y
direction and the superimposed service dead load is 15 psf. Calculate the slab factored
load in psf and the beam factored load in klf.
SOLUTION
1.5 The building in figure P.1 is used for light storage space. The slab is 10 in. thick on a 16 in. wide x 20
in. deep beam, the bay dimensions are 20’- 0” in the x direction and 25’- 0” in the y direction and the
superimposed sprinkler dead load is 4 psf. Calculate the slab factored load in psf and the beam factored
load in klf.
SOLUTION
1.6 The roof on the building in figure P.1 has a slab 7 in. thick on a 12 in. wide x 16 in. deep beam, the
bay dimensions are 19’- 0” in the x direction and 21’- 0” in the y direction and the superimposed service
dead load is 6 psf. Calculate the slab factored load in psf and the beam factored load in klf.
SOLUTION
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