STEEL DESIGN W/ ACCESS
6th Edition
ISBN: 9781337761499
Author: Segui
Publisher: CENGAGE L
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Textbook Question
Chapter 2, Problem 2.3P
A beam is part of the framing system for the floor of an office building. The floor is subjected to both dead loads and live loads. The maximum moment caused by the service dead load is 45 ft-kips, and the maximum moment for the service live load is 63 ft-kips (these moments occur at the same location on the beam and can therefore be combined).
a. If load and resistance factor design is used, determine the maximum factored bending moment (required moment strength). What is the controlling AISC load combination?
b. What is the required nominal moment strength for a resistance factor
c. If allowable strength design is used, determine the required moment strength. What is the controlling AISC lead combination?
d. What is the required nominal moment strength for a safety factor
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A wooden beam is fabricated from three boards, which are fastened together with screws, as shown. The screws are uniformly spaced
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mm, b. 23 mm, b₂100 mm, d₁-210 mm. d₂-32 mm. Determine:
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(b) the shear force F in each screw.
(c) the magnitude of the maximum bending stress max in the beam.
Answers:
(a) Fmax
(b) F-
(c) Omas
MPa.
N per screw.
MPa.
Screws
THE BEAM SHOWN BELOW HAS THE FOLLOWING PROPERTIES. f’c =30 MPa, fc=13.5 MPa, fy=400 MPa, fs=200MPa. DETERMINE THE FOLLOWING.
d)THE MOMENT CAPACITY OF THE BEAM ASSUMING IT IS UNCRACKED.
a. The beam weighs 3600N. Draw the V and M diagram. b. Assume we do not
know the weight of the beam the solid steel bar has a square cross section of side b
and is supported as shown. We know that density of steel is 7860 kg/m, calculate
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A
C
-1.2 m-1.2 m-
D
1-1-1
B
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b
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