In: Civil Engineering

A 12 in. x 18 in. rectangular beam has an effective span of 20 ft. A dead load of 1500 lb/ft (includes self weight) and a live load of 4000 lb/ft is applied to the beam. The concrete and steel strengths are 4000 psi and 60000 psi respectively. Design and detail the shear reinforcement for the beam. Assume d is 2 inches less than h

(1) Select the lightest, rectangular Douglas fir section for the
cantilever beam of15- ft span that will carry a uniform load of 450
lb/ft. [Hint: V max = wL; Mmax = wL2/2]

Design a rectangular reinforced concrete beam for a simple span
of 35 ft. Uniform service loads are 1.0 kip/ft dead load (excluding
the self-weight of the beam) and 1.2 kips/ft live load. Use
f′c=4,000 psi and fy=60,000 psi. Sketch your design.

A simple floor girder with a span 20 ft has a tributary width of
20 ft. The nominal loads that act on the floor system are shown
below. Using the ASCE 7 Strength Design load combinations determine
the factored design load in the beam (plf). Show all load
combination calculations and identify the controlling load
combination and resulting design values for positive and negative
moment (±Mu) and shear (Vu).
Nominal Loads
Live Load
40 psf
Floor Vertical Earthquake Load...

Problem 2: A simple roof beam with a span 30 ft has a tributary
width of 5 ft. The nominal loads that act on the roof system are
shown below. Using the ASCE 7 Strength Design load combinations
determine the factored design load in the beam (plf). Show all load
combination calculations and identify the controlling load
combination and resulting design values for positive and negative
moment (±Mu) and shear (Vu).
Nominal Loads
Roof Live Load 20 psf
Snow Load...

A 40 ft simple span beam is loaded with a uniform dead load of
2.4 kips/ft plus the beam self-weight and a uniform live load of
3.3 kips/ft. The lateral supports are located at the supports and
at the midpoint of the span. Determine the leastweight W-shape to
carry the load. Use A992 steel and Cb= 1.0. Design by (a) LRFD and
(b) ASD. [6.16-36]

A simply supported beam with a span of 26 FT is used to carry a
service dead load (including self-weight) of 1.65 KLF and a service
live load of 3.3 KLF and is reinforced with 4-#9 bars. The beam has
a width b of 14 IN, an effective depth of 24.5 IN., and a height of
27 IN. The material strengths are f’c = 4000 PSI and fy = 60 KSI.
The immediate deflection due to live load is limited...

A rectangular beam has a width of 300 mm and an effective depth
of 510 mm. It carries Vu = 200 KN and Mu = 55 KN-m and is
reinforced with 2650 mm2. Use f’c = 21 MPa and fy = 345
MPa. Normal concrete. Express your answer in two decimal
places.
a. Compute the shear strength in KN provided by concrete using
the less conservative formula as shown. Express your answer in two
decimal places.
b. Calculate the required...

1)
A full rectangular water tank has a base of 10 ft x 15 ft and is
20 ft high. What is the pressure at the bottom of the tank in a)
PSI b) Pa
2)
A cargo ship has a volume of 10,000 cubic meters. The total mass
of the ship and cargo is 8 million kg. Will it sink or float at the
surface of seawater having a density 1025 kg/m3? Why?

1. A 3.5 m clear span singly reinforced cantilever
beam has a rectangular section of b=300mm and D=500
mm is reinforced with 2 bars of 32 mm diameter and 1 bar of 25mm
diameter in the tension zone. The
live load taken by the beam is 19 kN/m. Check if the beam is safe
to carry the above load . Use M25
and Fe500.

Problem 2: A rectangular concrete beam measures 350mm wide and
has an effective depth of 425mm. Compression steel consisting of
two # 25 is located 65mm from the compression face of the beam. If
f ′ c=28MPa and fy = 420MPa, what is the design moment capacity of
the beam, according to the ACI code, for the following alternative
tensile steel area. (a) As = 3 # 32 bars in one layer, (b) As = 5 #
29 in two...

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