**Problem 7.21** Are the uncoated #8 bars shown anchored sufficiently with their 90° hooks? - \( f'_c = 4000 \, \text{psi} \) - \( f_y = 60 \, \text{ksi} \) The side and top cover is \( 2\frac{1}{2} \, \text{in.} \) on bar extensions. Normal-weight concrete is used. - Required steel area, \( A_s \text{required} = 2.20 \, \text{in.}^2 \). **Answer:** \( \ell_{dh} = 12.4 \, \text{in.} \), sufficient. **Diagram Explanation:** The diagram shows a right-angle hook configuration for the #8 bars. The setup includes: - **3 #8 Bars:** A label indicating three #8 rebar sections in the setup. - **12 in. Clear:** This dimension represents the clear vertical distance between adjacent elements. - **16 in. Clear Horizontal Extension:** Indicates the clear horizontal distance beyond which the bar is extended. - **14 in. Hook Length:** This is the length of the hook at the end of the rebar. - **2 in. Clear:** The clear concrete cover from the inner face of the hook to the outer concrete edge. This setup demonstrates the anchoring situation of the rebar within the concrete structure.

Problem 7.21 Are the uncoated #8 bars shown anchored sufficiently with their 90° hooks? - \( f'_c = 4000 \, \text{psi} \) - \( f_y = 60 \, \text{ksi} \) The side and top cover is \( 2\frac{1}{2} \, \text{in.} \) on bar extensions. Normal-weight concrete is used. - Required steel area, \( A_s \text{required} = 2.20 \, \text{in.}^2 \). Answer: \( \ell_{dh} = 12.4 \, \text{in.} \), sufficient. Diagram Explanation: The diagram shows a right-angle hook configuration for the #8 bars. The setup includes: - 3 #8 Bars: A label indicating three #8 rebar sections in the setup. - 12 in. Clear: This dimension represents the clear vertical distance between adjacent elements. - 16 in. Clear Horizontal Extension: Indicates the clear horizontal distance beyond which the bar is extended. - 14 in. Hook Length: This is the length of the hook at the end of the rebar. - 2 in. Clear: The clear concrete cover from the inner face of the hook to the outer concrete edge. This setup demonstrates the anchoring situation of the rebar within the concrete structure.

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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