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Determine the development length of the #9 bars. Is it safe?

Determine the development length of the #9 bars. Is it safe?

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Determine the development length of the #9 bars. Is it safe?

Determine the shear capacity of a W21x44.

 

## Structural Load Diagram and Beam Cross-Section Analysis ### Diagram Explanation #### Load Diagram - **Span:** 20 feet (horizontal distance across the beam). - **Live Load:** 8 pounds per square foot. - **Superimposed Dead Load:** 3 pounds per square foot. This part of the image illustrates a simple load distribution along a beam spanning 20 feet. The loads are depicted with arrows, indicating uniform distribution across the beam's span. #### Beam Cross-Section Design - **Dimensions:** - Width: 24 inches - Total Height: 36 inches - Effective Height: 33 inches - **Reinforcement:** - Top Reinforcement: #5 bars at 12-inch spacing (indicated by “#5 @ 12”) - Bottom Reinforcement: 6 #9 bars - **Material Properties:** - Concrete unit weight (γₙ): 150 pounds per cubic foot - Concrete compressive strength (f'c): 6 ksi (kips per square inch) - Yield strength of steel reinforcement (fᵧ): 60 ksi The cross-section diagram on the right provides details about the dimensions and reinforcement specifics of a concrete beam. Reinforcement bars are marked and labeled to show their placement and spacing, which is crucial for structural design by ensuring adequate support against bending and shear forces. This layout is essential for civil engineering studies focused on structural analysis and design, particularly in understanding how different loads are managed by structural elements like beams.
Transcribed Image Text:## Structural Load Diagram and Beam Cross-Section Analysis ### Diagram Explanation #### Load Diagram - **Span:** 20 feet (horizontal distance across the beam). - **Live Load:** 8 pounds per square foot. - **Superimposed Dead Load:** 3 pounds per square foot. This part of the image illustrates a simple load distribution along a beam spanning 20 feet. The loads are depicted with arrows, indicating uniform distribution across the beam's span. #### Beam Cross-Section Design - **Dimensions:** - Width: 24 inches - Total Height: 36 inches - Effective Height: 33 inches - **Reinforcement:** - Top Reinforcement: #5 bars at 12-inch spacing (indicated by “#5 @ 12”) - Bottom Reinforcement: 6 #9 bars - **Material Properties:** - Concrete unit weight (γₙ): 150 pounds per cubic foot - Concrete compressive strength (f'c): 6 ksi (kips per square inch) - Yield strength of steel reinforcement (fᵧ): 60 ksi The cross-section diagram on the right provides details about the dimensions and reinforcement specifics of a concrete beam. Reinforcement bars are marked and labeled to show their placement and spacing, which is crucial for structural design by ensuring adequate support against bending and shear forces. This layout is essential for civil engineering studies focused on structural analysis and design, particularly in understanding how different loads are managed by structural elements like beams.
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