CIVE 420 Final, Spring 2010
American University of Beirut · Concrete I · 1 page
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?roblem No. If (20 points) (Learning Outcome 9)
4 simply supported rectangular R/C beam has the following properties: span Jength = § m, b= ’
40 crs; h = 60 éms; d = 55 cms; f’, = 210 kg/sq.cm. The jongitudinal reinforcement is composed
of 4732 (Grade 60) in one layer. Center to center spacing of bars = 10.0 cms. The beam supports
a concentrated load P, = 27.5 tons at midspan. NEGLECT THE SELF-WEIGHT OF THE
BEAM. ; ty: ase
yes
}. Calculate the development length of the bars. (6 points) in
2. The minimum distance from midspan_ where 2 bars can be (i) theoretically cut-off, (ii)
actually cut-off. (74 points)