As per IS 800:2007, the maximum effective slenderness ratio for ‘members always in tension (other than pre-tensioned members)’ is :
- A180
- B250
- C350
- D400Correct
Solution
Concept
Slenderness limits of members (IS 800 Table 3)
Step-by-step solution
1. Members carrying compressive loads due to dead and live load: 180. 2. Tension members that may reverse under wind/earthquake: 350. 3. Members always in tension (other than pre-tensioned): 400.
Explanation
Tension members are less sensitive to slenderness because they do not buckle, so a higher limit of 400 is allowed when the member is always in tension.
Why the other options are wrong
180 is for compression members under dead and live loads, 250 is for compression members carrying loads due to wind or earthquake, and 350 is for tension members that may reverse.
Shortcut
180 / 250 / 350 / 400 for compression, wind-compression, reversal, always-tension.
Common mistake
Choosing 350.
Correct answer: D) 400