What is the anchorage value of a standard hook of a reinforcement bar of diameter-a)4Db)8Dc)12Dd)16DCorrect answer is option 'D'. Can you explain this answer?

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Answer

Anchorage Value of a Standard Hook

The anchorage value of a standard hook refers to the amount of force or load that the hook can withstand before it starts to pull out or fail. This value is determined by various factors such as the diameter of the reinforcement bar and the length of the hook.

Determining the Anchorage Value

The anchorage value of a standard hook is generally expressed in terms of the diameter of the reinforcement bar (D). The correct answer to the given question is option 'D', which means the anchorage value is 16D.

Explanation of Options

Option a) 4D: This means that the anchorage value is four times the diameter of the reinforcement bar. However, this value is relatively low and may not provide sufficient anchorage for most applications.

Option b) 8D: This means that the anchorage value is eight times the diameter of the reinforcement bar. While this value is higher than option a), it may still not be adequate for certain situations.

Option c) 12D: This means that the anchorage value is twelve times the diameter of the reinforcement bar. Although this value is higher than options a) and b), it may still not meet the required anchorage strength in many cases.

Option d) 16D: This means that the anchorage value is sixteen times the diameter of the reinforcement bar. This value is generally considered to be a standard requirement for most construction applications and provides sufficient anchorage strength.

Importance of Anchorage Value

The anchorage value is crucial in ensuring the stability and structural integrity of reinforced concrete elements. Proper anchorage of reinforcement bars helps to prevent pullout failures, which can occur when the applied loads exceed the capacity of the hooks to resist the forces acting on them.

By using hooks with an appropriate anchorage value, the reinforcement bars can be securely anchored to the concrete, allowing them to effectively transfer the applied loads and resist the tensile forces. This helps to ensure the overall stability and performance of the structure.

It is important to follow the recommended anchorage values specified in design codes and standards to ensure the safety and reliability of reinforced concrete structures.

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