1. For the rectangular beam shown here, calculate the development lengths of top No. 7 bars and bottom No. 9 bars. No. 4 bars are used for stirrups. The spacing of stirrups is 6 in. The clear side cover depth is 1.5 inch. (Clear cover depth means the distance from the beam face to the outer surface of a bar). Normalweight concrete is used.
1. For the rectangular beam shown here, calculate the development lengths of top No. 7 bars and bottom No. 9 bars. No. 4 bars are used for stirrups. The spacing of stirrups is 6 in. The clear side cover depth is 1.5 inch. (Clear cover depth means the distance from the beam face to the outer surface of a bar). Normalweight concrete is used.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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From the conditions given in problem 1, only the yield stress has been increased to 8000 psi (). Determine the development lengths with the increased compressive strength.
Transcribed Image Text:1. For the rectangular beam shown here, calculate the development lengths of top No. 7 bars and bottom No. 9 bars. No. 4 bars are used for stirrups. The spacing of stirrups is 6 inches. The clear side cover depth is 1.5 inches. (Clear cover depth means the distance from the beam face to the outer surface of a bar).
Normal weight concrete is used.
Therefore, Equation (6.5) and (6.6) will be used respectively. And the results shall be compared.
**Diagram Explanation:**
The diagram illustrates a cross-section of a rectangular beam. It includes:
- Two No. 7 (No. 22) bars positioned at the top.
- Four No. 9 (No. 29) bars positioned at the bottom.
- Stirrups are represented using No. 4 bars with a spacing of 6 inches.
- The dimensions of the beam are indicated as 20 inches in height and 10 inches in width.
- The clear cover depth on the sides is 1.5 inches, while distances from the top and bottom are also provided.
Transcribed Image Text:**Question 3:**
From the conditions given in problem 1, only the yield stress has been increased to 8000 psi. Determine the development lengths with the increased compressive strength.
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