2. A precast T beam is to be used as a bridge over a small roadway. Concrete dimensions are b = 48 in., bw = 16 in., hƒ= 5 in., and h = 25 in. The effective depth d = 20 in. Concrete and steel strengths are 6000 psi and 60,000 psi, respectively. Using approximately one-half the maximum tensile reinforcement permitted by the ACI Code (select the actual size of bar and number to be used), determine the design moment capacity of the girder. If the beam is used on a 30 ft simple span, and if in addition to its own weight it must support railings, curbs, and suspended loads totaling 0.475 kip/ft, what uniform service live load limit should be posted?
2. A precast T beam is to be used as a bridge over a small roadway. Concrete dimensions are b = 48 in., bw = 16 in., hƒ= 5 in., and h = 25 in. The effective depth d = 20 in. Concrete and steel strengths are 6000 psi and 60,000 psi, respectively. Using approximately one-half the maximum tensile reinforcement permitted by the ACI Code (select the actual size of bar and number to be used), determine the design moment capacity of the girder. If the beam is used on a 30 ft simple span, and if in addition to its own weight it must support railings, curbs, and suspended loads totaling 0.475 kip/ft, what uniform service live load limit should be posted?
Traffic and Highway Engineering
5th Edition
ISBN:9781305156241
Author:Garber, Nicholas J.
Publisher:Garber, Nicholas J.
Chapter20: Design Of Rigid Pavements
Section: Chapter Questions
Problem 1P: Portland cement concrete consists of what four primary elements?
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
Transcribed Image Text:2.
A precast T beam is to be used as a bridge over a small roadway. Concrete dimensions are
b = 48 in., bw = 16 in., hƒ= 5 in., and h = 25 in. The effective depth d = 20 in. Concrete and
steel strengths are 6000 psi and 60,000 psi, respectively. Using approximately one-half the
maximum tensile reinforcement permitted by the ACI Code (select the actual size of bar
and number to be used), determine the design moment capacity of the girder. If the beam
is used on a 30 ft simple span, and if in addition to its own weight it must support railings,
curbs, and suspended loads totaling 0.475 kip/ft, what uniform service live load limit
should be posted?
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