Question

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. The

effective depth may be assumed to be 2.5 in. less than the total
depth.

Answer #1

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.

A rectangular RC beam is simply supported over a span of 8m and
carries a dead load of 15kN/m (including self-weight) and an
imposed load of 8kN/m. The beam is 250mm wide and has an effective
depth of 400mm. Grade 30 concrete is to be used.
Determine if the beam should be singly reinforced or
doubly reinforced.

A simply supported rectangular beam of 5m span carries a
characteristic dead, gk (inclusive of the beam’s self-weight) and
imposed, qk, loads of 15 and 7 kN/m respectively.
Given the following data:
Beam: 285mm wide and 500mm high, Reinforcement steel: High
tensile steel, Concrete grade: C30, Exposure condition: Mild and
Fire resistance = 1.5h.
Design the rectangular beam according to BS8110.

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...

Design a rectangular reinforced concrete beam for Mu = 550 k-ft
(not including self-weight). Use f’c = 4000 psi and fy = 60,000
psi. Use a design ρ = 0.01. Using the method of
bd2, and choosing a width b no smaller than 15
inches and no larger than 18 inches, design a beam to resist the
moment. Save room for #3 stirrups. Report your final design and
draw the cross-section labeling all dimensions and showing the
rebar layout and...

Determine the largest allowable bending moment for a rectangular
reinforced concrete beam having the width b = 200 mm, total height
h = 375 mm and the distance from the bottom surface of the beam to
the centre line of steel bars = 75 mm. Use the total area of steel
As = 1360 mm2, modulus of elasticity of concrete = 30 GPa, modulus
of elasticity of steel = 210 GPa, allowable compressive stress for
concrete = 15 MPa and...

While working with a concrete subcontractor, you were asked to
redesign a concrete beam to use No #8 reinforcing bars as the Sub
has excess amounts of it. To do so, you need to determine the
following: 1) The effective depth of the beam (d) 2) The total
depth of the beam (h) 3) The area of tensile reinforcing required
and then the number of #8 bars The service load bending moments on
the beam are 62 kip-ft for dead...

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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