Civil Engineering - Steel Structure Design - Discussion

1. 

The effective length of a compression member of length L held in position and restrained in direction at one end and effectively restrained in direction but not held in position at the other end, is

[A]. L
[B]. 0.67 L
[C]. 0.85 L
[D]. 1.5 L
[E]. 2 L

Answer: Option A

Explanation:

No answer description available for this question.

Kishan said: (Feb 25, 2014)  
As both ends are pin jointed and free to rotation.

Nirmal said: (Jun 30, 2014)  
Its answer. Should be 1.5 as one end is fix in rotation and translation movement while other end is rigid with roller support.

Swamy said: (Dec 19, 2014)  
Answer is E. Fixed at bottom and free at other end it is cantilever. So answer is 2.0 L.

Michael L Rokhum said: (Jan 11, 2015)  
The correct answer is E. It says and I quote "not held in position" so is free to sway. Hence it's 2L.

Aachal said: (Jan 16, 2015)  
The correct answer is 1.2 as one end is fixed and the other end free to move in horizontal direction.

Ashok Kumar said: (Jan 23, 2015)  
Effectively held in position and restrained against the rotation at one end and the other end is restrained against the rotation but not held in position:

Effective length = 0.80 L.

Himanshu said: (Feb 6, 2015)  
Effectively held in position and restrained against rotation at one end, and at the other end restrained against rotation but not held in position.

Effective length = 1.2 L.

Kavish Srivastava said: (May 29, 2015)  
The question is incorrect or incomplete because it has not mention whether to tell - theoretical or recommended value of effective length. As per theoretical value of effective length the answer will be "l". But. As per recommended value of effective length the answer will be "1.2l".

On other hand this question can be considered a tricky one, since the optional value "0.67l" and "0.85l" doesn't exist in place it is "0.65l" and "0.8l". Moreover "1.5l" couldn't b the answer since there is no where mention the partially restrained against rotation condition.

So this is also incorrect. "2l" can also not b the correct one because your its only applicable for 2 conditions for which you can refer your book or notes.

Thank you!

Binita Ekka said: (Aug 6, 2015)  
In any steel structure book recommended vale is given but theoretical is not mentioned. So by default we will understand that recommended value is asked. Recommended value is 1.2L.

Anuj Hiwre said: (Aug 28, 2015)  
In IS 456:2000, Table no. 28, the theoretical value of effective length for above mentioned condition is 1.00L. Therefore answer is correct.

Sumit Meena said: (Sep 12, 2015)  
In IS-456:2000 for the given condition.

Theoretical value of L (eff) = L.

Recommended value of L (eff) = 1.2 L.

Hence given Answer is absolutely correct!

Mike Tyson said: (Dec 14, 2015)  
Actual answer is 1.2L reference design of steel structures by S.Ramamurtham & R.Narayanan. Options has to be changed.

Himanshu said: (May 24, 2016)  
The correct answer is 1.5 L.

Suman Sarkar said: (Jun 15, 2016)  
The correct answer is 1.2.

Gulshan Suhag said: (Jun 22, 2016)  
Correct ans is 1.2l.

Navneet Solanky said: (Aug 8, 2016)  
According to me, the correct one is 2L.

Saumya Awasthi said: (Aug 17, 2016)  
The answer is 1.2 L.

Rakeysh said: (Oct 9, 2016)  
The perfect answer is 1.2 L.

Rakesh Katm said: (Oct 21, 2016)  
1.2 L is the correct answer.

Sangeetha said: (Nov 7, 2016)  
1.2L is correct, according to IS:800-1984.

Ram Vishwakarma said: (Nov 8, 2016)  
The correct answer is 1.20 L.

Baloch said: (Nov 10, 2016)  
As per the question, one end is "held" other is not 'held' which sounds Pin and Fixed supports, i.e. 0.8L.

Bablu said: (Nov 24, 2016)  
1.2 L is the answer according to IS: 800-2007 table 11.

Gdr said: (Dec 3, 2016)  
1.2 L is the correct answer.

Arvind said: (Dec 5, 2016)  
1.2L is the correct answer.

Suraj Yadav said: (Dec 13, 2016)  
I agree with the given answer i.e L.

Amresh Kumar Meena said: (Dec 17, 2016)  
Both ends are pin joints and free in rotation.

Raju said: (Dec 19, 2016)  
Yes, I agree that 1.2L is the correct answer.

Amulya Yadav said: (Feb 5, 2017)  
Yes, 1.2 L is right.

I too agree.

Sachin Chaurasia said: (Mar 2, 2017)  
According to me, 1.2 is right.

Satyawan Suthar said: (Mar 7, 2017)  
According to IS :800 -1984 the answer should be 1.2L.

Munde Suresh said: (Mar 14, 2017)  
According to me the correct answer 1.2l.

Sagar said: (Apr 4, 2017)  
I also agree that 1.2 correct answer.

Santhosh Kumar said: (Apr 27, 2017)  
As per norms,

Theoretical value = L.
Recommended =1.2L.

Devender Yadav said: (May 15, 2017)  
Answer is 1.2 (correct)

Ajay Ray said: (May 16, 2017)  
Table 11 of IS 800:2007.

The correct answer is 1.2L.

K. C. Akshaya said: (May 22, 2017)  
I think the correct answer is 1.2 l.

Vikash said: (May 29, 2017)  
Ans [D].

When both end of a column is restraint and one end is not in position then effective length may be 1.5L or 1.2L conditionally but according to options 1.5L will be the answer.

Indu said: (Sep 2, 2017)  
At one end is a restrained translation, free rotation as well as another side so, it's equals to 1.0L Nothing but L.

Amit Kumar said: (Sep 6, 2017)  
According IS:800_1984 Table no. 5.2 (clauses 5.2.2) (page no. 42).

Answer is 1.2L.

Praveen Gehlot said: (Oct 3, 2017)  
clause 5.2.2 IS 800-1984.

Answer is 1.2L.

Rakesh said: (Oct 28, 2017)  
The correct answer would be 1.2L. refer IS 800:2007 clause 7.2.2.

Tewelde said: (Dec 7, 2017)  
2L is the correct answer. Because one end is restrained so the effective length should 2L.

Deepak said: (Dec 9, 2017)  
1.2l is recommended and 1l is a theoritical value so it's not wrong.

Madhukar said: (Dec 26, 2017)  
1.2 L is correct.

Garry said: (Jan 17, 2018)  
References design of steel structures SK Duggal the correct answer should be 1.2L.

Udit said: (Feb 13, 2018)  
The ans as per IS 800-2007: steel code.
Ans be 1.2L.
As per is 456-2000.
Ans be 1.0 L.

Harsh said: (Feb 13, 2018)  
Yes, the correct answer would be 1.2.

Ramesh said: (Mar 6, 2018)  
Member whose one end hinged and other rollers. So it's answer is 1.5.

Amit said: (Apr 5, 2018)  
The correct answer is 1.2.

Tameshwar Dewangan said: (Apr 28, 2018)  
Yes, 1.2 is the correct answer.

Prateek said: (May 14, 2018)  
The correct answer is 1.2L.

Rocky said: (May 30, 2018)  
1.2L is absolutely correct.

Poonam Chand said: (Jun 21, 2018)  
The correct answer is 1.2L.

Chandan Anand said: (Jul 7, 2018)  
1.2L is right.

Sam said: (Sep 8, 2018)  
I think C is the right answer.

Shiv Kumar said: (Sep 10, 2018)  
As per my knowledge 1.2 is the correct answer.

Akshay Lakhanpal said: (Sep 14, 2018)  
The answer should be 1.2L.

Rishi said: (Oct 17, 2018)  
The answer should be 1.5L.

Rakesh said: (Oct 21, 2018)  
1.2L is the correct answer.

Kiran said: (Oct 31, 2018)  
L is the correct answer.

Kishan said: (Dec 20, 2018)  
1.2l is the correct answer according to me.

Sachin said: (Dec 21, 2018)  
Yes, 1.2 L is the correct answer.

Debonil Saha said: (Feb 1, 2019)  
1.2L is the correct answer.

Ranku Biswas said: (Mar 9, 2019)  
@All.

I will explain this in easy way;

Held in position= it can't move.
+
Restrained in direction = can't rotate
= fixed one end.

Effectively Restrained in direction = can't rotate.
+
Not held in position = it can move.
= roller.

Therefore support conditions are one end fixed and another one roller.
Theoretical value is 1 and the recommended value is 1.2.

Suman said: (Apr 7, 2019)  
Ans should be 1.2L as one end is fixed and other end is allowed to move in horizontal direction only so as per IS 800:1984 Clause 5.2.2 the ans should be 1.2L.

Milan said: (May 2, 2019)  
1.2 L is correct.

Ram Ashish Maurya said: (Aug 24, 2019)  
Effective h1 is 2L.

Bose said: (Sep 8, 2019)  
1.2L is the correct answer.

Chinmaya said: (Oct 31, 2019)  
One support is fixed and the other is shear rollered so theoretical value 1.0L but codal value 1.20L.

Opsc Aee said: (Nov 22, 2019)  
1 end is fixed another 1 end is free.

So 2L.

Mahendra said: (Dec 12, 2019)  
The correct answer is 1.2.

Chandni Singh said: (Apr 8, 2020)  
Correct ans is 1.2L.

Ref: R.S. Khurmi & J.K .Gupta ( S.Chand publication).

Abubakar said: (Apr 15, 2020)  
What's is meant by held in position and restrained in direction? Please explain it.

Santosh Kumar Swain said: (Jul 17, 2020)  
According to Code IS : 806-1968, L is correct.

Md Irfan Alam said: (Jul 22, 2020)  
In IS-456:2000(Table-28) for the given condition.

Theoretical value of L (eff) = L.
Recommended value of L (eff) = 1.2 L.
As per IS :800;2007(Table-11).
L(eff)=1.0L.
Hence given Answer is absolutely correct.

Harsh Shukla said: (Jul 31, 2020)  
One end fixed other end Restricted in rotation but not held in position.
Theoretical (SOM) = 1.0L.
Recommended (RCC) = 1.2L.

Since, 1.2 L is not in option hence L will be the answer. Answer (A) is correct.

Ali said: (Aug 22, 2020)  
The Correct answer is 1.2L.

Parveen Kumar said: (Sep 10, 2020)  
The right answer is 1.20.

Rohan Mukherjee said: (Sep 24, 2020)  
It's 1.2L.

Sanku said: (Oct 11, 2020)  
1.2L will be the correct answer.

Tej Pratap said: (Nov 1, 2020)  
Yes, the right answer is 1.2L.

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