Correct Answer - Option 2 : 40°
Explanation:
As per IS 800 Design specifications of lacing are:
1. The angle of inclination of the lacing with the longitudinal axis of the column should be between 40° to 70°.
2. The slenderness ratio of the lacing bar should not exceed 145.
3. Minimum width of lacing in riveted connections should be:
|
ϕ (mm)
|
22
|
20
|
18
|
16
|
|
Width (mm)
|
65
|
60
|
55
|
50
|
Which is approximated to 3 times the nominal diameter.
Note: The inclination of lacing bars with the axis of the compressive member should be more than 40° and less than 70°.
