Question

Design a simply supported one-way reinforced concrete floor slab to span 12 ft and carry a service live load of 180 psf and a service dead load of 20 psf. Use fc’=3000 psi and fy=60,000 psi. Make the slab thickness to 1⁄2 inch increments. (Hint: Design the slab according to the ACI Code minimum thickness)

Answer #1

Design a one-way floor slab to carry a uniform live load of 500
psf on a simply supported span of 21 ft, given
fc’=4000 psi and
fy=50000 psi. Use the ACI 318 code. Keep the
reinforcement ratio at about 30% of the amount of balanced strain
condition so that deflection is unlikely to be excessive.

Design a simple-span one-way slab to carry a uniformly
distributed live load of 450 psf. this is the only load to be
supported other than the self weight of the slab. the span is 7-ft,
center-to-center of the supports. Assume f'c = 4000 psi, fy = 60000
psi. Design per foot of width.

A simply supported reinforced concrete beam has a width (b) of
14 inches, and an effective depth (d) of 24 inches. It is
reinforced with 3 # 8 bars. Assume 60-ksi steel and 3000-psi
concrete. Determine the resisting moment (Mr) in ft-k that this
beam can safely sustain.
Problem 2
The beam given in Problem 1 has a span of 21 ft. It is supposed
to carry a uniformly distributed service dead load of 3.7 k/ft, in
addition to its...

The project will include the design of One Way Slabs, Beams and
Columns.
Choose the largest room in your house/apartment and measure the
area. let's say (length 6m* width 4m) ( height 3m)
Steel yield stress (fy = 60000 psi)
Concrete ultimate compressive strength (f’c = 4000 psi)
Reinforced concrete density = 150 lb/ft3.
Normal weight concrete is used.
The slab is treated as a one way slab and subjected to a dead
load of 120 psf (excluding the self-weight...

design a simply supported floor beam of A992 steel to carry a
De0ad load of 0.5k/ft and a Live load of 1.5k/ft over a span 24 ft.
The beam has Full lateral bracing provided. Show All steps.

Problem 3
A reinforced concrete beam is cantilevered over a span of 10 ft.
The beam width is 14”. The beam is supposed to carry a uniformly
distributed service dead load of 1.2 k/ft and a uniformly
distributed service live load of 0.5 k/ft over its entire span. The
dead load includes an allowance for the beam weight. Assume 60- ksi
steel and 4,000-psi concrete.
1.Use the design equations to determine the minimum required
effective depth (d).
2.Select the tensile...

A
three-span continuous beam supports 6-inch thick one-way slabs that
span 20 ft center-to-center of beams. The beams have clear spans,
face-to-face of 16-in.-square columns, of 27, 30, and 27 ft. The
floor supports ceiling, ductwork, and lighting fixtures weighing a
total of 8 psf, ceramic floor tile weighing 16 psf, partitions
equivalent to a uniform dead load of 20 psf, and a live load of 100
psf. Design the beam, using f’c = 4500 psi and fy = 60...

2. Design a reinforced concrete beam of 20 feet span carrying a
uniformly distributed load of 1200 lbs/ft. Use Fc = 3,000 psi and
steel stress of 20,000 psi and assume appropriate modulus of
elasticity and other required material properties.

Consider a simply supported one-way slab over a 15ft span, 6in
thick with #5 bars at 12" on top and #5 bars 12" at bottom.
Do the following:
(a) total load
(b) Concrete slab thickness change to 6.5 inches.
(c) If footer were drop 3in what will happen?

A rectangular, tension-reinforced beam is to be designed for
dead load of 500 lb/ft plus
self-weight and service live load of 1200 lb/ft, with a 22 ft
simple span. Material strengths will be fy =
60 ksi and fc・= 3 ksi for steel and concrete, respectively. The
total beam depth must not exceed 16
in. Calculate the required beam width and tensile steel
requirement, using a reinforcement
ratio of 0.60 ρ0.005 . Use ACI load factors and strength reduction
factors....

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