Current Attempt in Progress A composite beam is fabricated by bolting two 2.4-in.-wide by 10-in.-deep timber planks to the sides of a 0.6-in. by 10-in. steel plate. The moduli of elasticity of the timber and the steel are 1790 ksi and 28300 ksi, respectively. The simply supported beam spans a distance of 18 ft and carries two concentrated loads P, which are applied as shown. Assume LAB = LCD= 4 ft, LBc= 10 ft, b = 2.4 in., d = 10 in. and t = 0.6 in. (a) Determine the maximum bending stresses o,, o, produced in the timber planks and the steel plate if P = 3.4 kips. (b) Assume that the allowable bending stresses of the timber and the steel are 1450 psi and 25000 psi, respectively. Determine the largest acceptable magnitude for concentrated loads P. (You may neglect the weight of the beam in your calculations.) Answers: (a) o, = (b) P= LAB i i B LBC F Lodlod b Cross section C kips. d ksi, o, = LCD D ksi.
Current Attempt in Progress A composite beam is fabricated by bolting two 2.4-in.-wide by 10-in.-deep timber planks to the sides of a 0.6-in. by 10-in. steel plate. The moduli of elasticity of the timber and the steel are 1790 ksi and 28300 ksi, respectively. The simply supported beam spans a distance of 18 ft and carries two concentrated loads P, which are applied as shown. Assume LAB = LCD= 4 ft, LBc= 10 ft, b = 2.4 in., d = 10 in. and t = 0.6 in. (a) Determine the maximum bending stresses o,, o, produced in the timber planks and the steel plate if P = 3.4 kips. (b) Assume that the allowable bending stresses of the timber and the steel are 1450 psi and 25000 psi, respectively. Determine the largest acceptable magnitude for concentrated loads P. (You may neglect the weight of the beam in your calculations.) Answers: (a) o, = (b) P= LAB i i B LBC F Lodlod b Cross section C kips. d ksi, o, = LCD D ksi.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Current Attempt in Progress
A composite beam is fabricated by bolting two 2.4-in.-wide by 10-in.-deep timber planks to the sides of a 0.6-in. by 10-in. steel plate.
The moduli of elasticity of the timber and the steel are 1790 ksi and 28300 ksi, respectively. The simply supported beam spans a
distance of 18 ft and carries two concentrated loads P, which are applied as shown. Assume LAB = LCD= 4 ft, LBc = 10 ft, b = 2.4 in., d = 10
in. and t = 0.6 in.
(a) Determine the maximum bending stresses o,, o, produced in the timber planks and the steel plate if P = 3.4 kips.
(b) Assume that the allowable bending stresses of the timber and the steel are 1450 psi and 25000 psi, respectively. Determine the
largest acceptable magnitude for concentrated loads P. (You may neglect the weight of the beam in your calculations.)
Answers:
(a) o, =
(b) P=
LAB
i
i
B
LBC
F
Lodlod
b
Cross section
C
kips.
d
ksi, o, =
LCD
D
ksi.
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