The maximum effective slenderness ratio, , values of a beam, strut or tension member shall not exceed those given in Table 3. ' ' is the effective length of the member and ' ' is appropriate radius of gyration based on the effective section as defined in 3.6.1.
Table 3 Maximum Values of Effective
Slenderness Ratios
| Sl No. | Member | Maximum Effective Slenderness Ratio (KL/r) |
|---|---|---|
| (1) | (2) | (3) |
| i) | A member carrying compressive loads resulting from dead loads and imposed loads | 180 |
| ii) | A tension member in which a reversal of direct stress occurs due to loads other than wind or seismic forces | 180 |
| iii) | A member subjected to compression forces resulting only from combination with wind/earthquake actions, provided the deformation of such member does not adversely affect the stress in any part of the structure | 250 |
| iv) | Compression flange of a beam against lateral torsional buckling | 300 |
| v) | A member normally acting m a tie in a roof truss or a bracing system not considered effective when subject to possible reversal of stress into compression resulting from the action of wind or earthquake forces1) | 350 |
| vi) | Members always under tension1) (other than pre-tensioned members) | 400 |
b) Tension members, such as bracing's, pre-tensioned to avoid sag, need not satisfy the maximum slenderness ratio limits.