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Consider the following statements:
1. The two angle sections placed back to back are most frequently used in roof trusses.
2. A built-up section consisting of two channel sections back to back is occasionally used.
3. The local buckling of a compression member limits its size.
Which of these statements are correct?
  • a)
    Both 1 and 2
  • b)
    Both 1 and 3
  • c)
    Both 2 and 3 
  • d)
    1,2 and 3
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Consider the following statements:1. The two angle sections placed bac...
Analysis of Statements
To evaluate the correctness of the given statements regarding structural members in civil engineering, we can analyze each one individually.
Statement 1: Two Angle Sections in Roof Trusses
- Two angle sections placed back to back are indeed a common choice in roof trusses.
- They provide excellent resistance against bending and shear forces, making them suitable for various loading conditions.
Statement 2: Built-up Section with Channel Sections
- A built-up section consisting of two channel sections back to back is occasionally used in practice.
- This configuration helps in achieving the required strength and stiffness, particularly in larger spans or where specific design constraints exist.
Statement 3: Local Buckling of Compression Members
- Local buckling is a critical concern for compression members, particularly for slender sections.
- It indeed limits the effective size and capacity of these members, necessitating careful design consideration to prevent failure.
Conclusion: All Statements are Correct
- Each statement presented is accurate and reflects common practices and considerations in structural engineering.
- Therefore, the correct answer is option 'D', as all three statements are valid observations regarding the use of structural members in roof trusses and the implications of local buckling.
In summary, understanding these concepts is essential for designing safe and efficient structures in civil engineering.
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Consider the following statements:1. The two angle sections placed back to back are most frequently used in roof trusses.2. A built-up section consisting of two channel sections back to back is occasionally used.3. The local buckling of a compression member limits its size.Which of these statements are correct?a)Both 1 and 2b)Both 1 and 3c)Both 2 and 3d)1,2 and 3Correct answer is option 'D'. Can you explain this answer?
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