Determine the required spacing of #3 stirrups (Grade 40) along the length of a 5000 psi, 35-ft long concrete beam. The beamwidth is 15 inches and the height is 36 inches. Estimate that the bottom layer of reinforcement is centered at 3 ½ inches from the bottom of the beam. Assume that you should provide a maximum of 3 different spacings (and perhaps only 2) for the stirrups so as not to overcomplicate matters for the contractor. The service loading on the beam is 1 k/ft for the dead load (does NOT include self-weight) and the service live load is 2 k/ft. The beam is cast monolithically with the columns and is a single span. Include the effects of the shear maximum envelope. Show all checks for minimum and maximum allowable stirrup bar areas and spacings per ACI 318-19. Please DRAW and label the factored maximum shear envelope diagram across the length of the beam (with the φ factor included). Please DRAW an elevation view of the beam for one-half of the beam length to scale and label/dimension the locations and spacings of the stirrups.
Determine the required spacing of #3 stirrups (Grade 40) along the length of a 5000 psi, 35-ft long concrete beam. The beamwidth is 15 inches and the height is 36 inches. Estimate that the bottom layer of reinforcement is centered at 3 ½ inches from the bottom of the beam.
Assume that you should provide a maximum of 3 different spacings (and perhaps only 2) for the stirrups so as not to overcomplicate matters for the contractor. The service loading on the beam is 1 k/ft for the dead load (does NOT include self-weight) and the service live load is 2 k/ft. The beam is cast monolithically with the columns and is a single span. Include the effects of the shear maximum envelope.
Show all checks for minimum and maximum allowable stirrup bar areas and spacings per ACI 318-19.
Please DRAW and label the factored maximum shear envelope diagram across the length of the beam (with the φ factor included).
Please DRAW an elevation view of the beam for one-half of the beam length to scale and label/dimension the locations and spacings of the stirrups.
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