The 'slenderness ratio' limit for compression members in IS 800 is:
Choose the correct answer
Always 120 for all members
180 for primary compression; 250 for wind/seismic; 350 for tension with occasional compression per IS 800
50 for all members
No limit specified in IS 800
Correct Answer
B. 180 for primary compression; 250 for wind/seismic; 350 for tension with occasional compression per IS 800
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IS 800 Cl. 7.3.3: maximum slenderness ratio (KL/r) for compression members: (1) Members carrying load from dead + live (primary compression): 180; (2) Members carrying wind/seismic + gravity: 250; (3) Tension members used as compression in load reversal: 350; (4) Members normally in tension (sag rods etc.): 400. Higher limit → more slender allowed for light loading.
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