Correct Answer - Option 2 : 0.85 L
Following table gives the effective buckling length of different types of angles struts
|
Type
|
End connection
|
Effective length (l)
|
|
1. Single angle discontinuous
|
i. One rivet or bolt at each end
|
l = L
|
|
ii. Two or more rivet or bolts at each end
|
l = 0.85 L
|
|
2. Double angle, discontinuous, stitched together
|
i. Connected on the same side of gusset plate
a) One rivet or bolt at each end
b) Two or more rivet or bolt at each end
|
l = L
l = 0.85 L
|
|
ii. Connected on both side of gusset plate by two or more rivet or bolt
|
l = 0.7 to 0.85 L
|
|
3. Single or double angle, continuous
|
One or more rivet or bolt
|
l = 0.7 to 0.85 L
|
Important point:
In question it is not mentioned whether it is for Single angle or double angle, but in both the cases for two or more rivets (double rivets) the effective buckling length is 0.85 L.
