Question

Please select the reinforcement spacing for the entire span of a simply supported beam on a 22 ft span. Use the detailed method to calculate Vc. Do not use a shear envelope diagram use the regular shear force diagram. Use b = 16 in., d = 27 in., the main bending reinforcement consists of 4 #9 bars. The unfactored dead and live loads are 2.6 Kip/ft and 2.5 kip/ft, respectively, f’c = 4500 psi, and fy = 60,000 psi. Use #3 U stirrups. Also, locate in your beam the point beyond which no stirrups are required and find the distance from that point to the supports and to midspan. Use any allowable shear force reduction permitted by the ACI code. Provide a sketch of your final design.

Answer #1

A simply supported rectangular concrete beam is 18 in. wide and
has an effective depth of 32 in. The beam supports a factored load
(wu) of 15 kips/ft. on a clear span of 22 ft. The given load
includes the weight of the beam. Use f'c = 4,000 psi. and fy =
60,000 psi.
Over what length of span are stirrups required?
Group of answer choices
8.35 ft.
9.18 ft.
10.26 ft.
Stirrups are not required for this beam.
None...

A rectangular beam having b=300 mm and d=575 mm, spans 5.5 m
face to face of simple
supports. It is reinforced for flexure with 4φ32 bars that continue
uninterrupted to the ends of
the span. It is to carry a service dead load wD=30 kN/m (including
self-weight) and a service live
load =45 kN/m both uniformly distributed along the span. Design the
shear reinforcement using
φ10 vertical U stirrups. Use the equation (a) for Vc. Material
strengths are fc’=22 and...

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...

A simply supported rectangular concrete beam is 18 in. wide and
has an effective depth of 32 in. The beam supports a factored load
(wu) of 15 kips/ft. on a clear span of 22 ft. The given load
includes the weight of the beam. Use f'c = 4,000 psi. and fy =
60,000 psi.
What is the un-rounded stirrup spacing requirement at the
critical section?
Group of answer choices
3.23 in.
3.63 in.
4.04 in.
4.50 in.
None of the...

A Douglas fir 4x8 beam (select structural) is simply-supported
(unbraced) and has a span of 10 FT. it is subject to a dead load of
200 PLF and a live load of 100 PLF. The beam is in an outdoor
environment which is not expected to be extremely hot for sustained
periods.
(a)Determine which timber design parameters/factors (Fb, Fv, Fc,
Cm, Ct, etc.) are relevant to bending and explain in words (or show
calculations for) your choice of value for...

a
rectangular beam having dimensions: b=300mm and d=550mm, spans 6m
face to face of simple supports. it is reinforced for flexure with
3D36mm bars that continue uninterrupted to the ends of the soan. it
is to carry a service dead load of 23.8 KN/m (including
self-weight) and a service lice load equal to 47.6 KN/m, both
uniformly distributed along the span. use fc’=27.6 Mpa and fy=414.7
Mpa. Normal weight concrete will be used and diameter of stirrup
are 10mm.
1.using...

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