Correct Answer - Option 1 : 350
Explanation:
Slenderness ratio limits:
In order to provide adequate rigidity to prevent undesirable lateral movement or excessive vibrations, maximum slenderness ratio for tension members has been specified in IS 800: 2007 and are given below:
As per IS: 800 - 2007
|
Type of member
|
Maximum slenderness ratio
|
|
A member carrying compressive loads resulting from the dead load and the imposed load
|
180
|
|
A tension member in which a reversal of direct stress occurs due to loads other than wind and seismic forces
|
180
|
|
A member subjected to compression force resulting only from combination with wind/earthquake actions, provided the deformation of such members does not adversely affect the stress in any part of the structure
|
250
|
|
Compression flange of a beam against lateral torsional buckling
|
300
|
|
A member normally acting as a tie in a roof truss or a bracing system is not considered effective when subjected to a possible reversal of stress into compression resulting from the action of wind earthquake forces.
|
350
|
|
Member always under tension (other than pre-tensioned members)
|
400
|
Note:
- For a hanger bar (selling fan rod) maximum slenderness ratio is 160.
- The Maximum slenderness ratio for lacing members is 145.
