Civil Engineering - Steel Structure Design - Discussion

Discussion Forum : Steel Structure Design - Section 2 (Q.No. 44)
44.
When a large value of radius of gyration is not required
channels are placed back to back
channel flanges are kept inward
channel flanges are kept outward
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
7 comments Page 1 of 1.

Prem lakwad said:   8 years ago
Options A is correct because face to face provide large value of radius gyration.

Prem lakwad said:   8 years ago
Channel is used as column flange then option B is correct.

Ritu said:   8 years ago
Channel should be placed back to back when less radius of gyration is required.

And should be placed face to face when the large radius of gyration is desirable.

Pellu said:   7 years ago
According to me, Option A is correct.

Ashu said:   6 years ago
Right @Ritu.

Shivakant said:   5 years ago
The option B is correct;

(1) For outward (back to back) Iyy>Ixx
(2) For inward (face to face) Iyy<Ixx

Ixx is same for both the cases but Iyy from the case-(2) will be least.
So, the minimum moment of inertia will be from the case-(2) and so the minimum radius of gyration.

Ishu said:   4 years ago
option [a] and [c] both are correct
(2)

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