Match the following lists :
| List-I (Members) | List-II (Maximum effective slenderness ratio) |
|---|---|
| P.A tension member in which a reversal of direct stress occurs due to loads other than wind or seismic forces | 1.350 |
| Q.A member subjected to compressive forces resulting only from a combination of wind actions | 2.400 |
| R.A member normally acting as a tie in a roof truss which is not considered effective when subject to reversal of stress resulting from the earthquake | 3.180 |
| S.Members always in tension | 4.250 |
Select the correct answer using the code given below :
- A2 3 4 1
- B3 4 1 2Correct
- C3 4 2 1
- D2 4 1 3
Solution
Concept
Maximum slenderness ratios in IS 800
Step-by-step solution
1. A tension member with reversal of stress from loads other than wind or earthquake: 180 → 3. 2. A member subject to compression from wind or earthquake only: 250 → 4. 3. A tie not considered effective under earthquake reversal: 350 → 1. 4. Members always in tension: 400 → 2.
Explanation
Slenderness limits are tightest (180) for members taking compressive load from dead and live loads and loosest (400) for members always in tension.
Why the other options are wrong
The other codes assign 400 to members that can carry compression.
Shortcut
180 / 250 / 350 / 400.
Correct answer: B) 3 4 1 2