Question

The effective depth of end battens should be

(i) More than twice the flange width of component columns

(ii) More than the distance between CG of component columns

(iii) Less than twice the flange width of component columns

(iv) Less than the distance between CG of component columns

1. (i) and (ii) 
2. (iii) and (iv)
3. (i) and (iv)
4. (ii) and (iii)

Answer 1

Correct Answer - Option 1 : (i) and (ii) 

Explanation:

Effective depth of end battens should be:

• More than twice the flange width of the component column.
• More The distance between the center of gravity of the component members.

The design of battened column is prescribed under section 7.7 of IS 800: 2007. As per 

1) 7.7.1.3 – The number of battens shall be of a minimum of three bays members.

2) 7.7.1.4 – The effective slenderness ratio should be taken 1.1 times the actual slenderness ratio.

3) 7.7.2.1 – Battens should be designed to carry 2.5% of the axial load of its transverse shear capacity.

4) 7.7.2.3 – The thickness of the batten or the tie plates shall not be less than one-fiftieth of the distance between innermost connecting lines of connection.

5) 7.7.3 – The spacing shall be such that the slenderness ratio shall neither be greater than 50 nor greater than 0.7 × slenderness ratio of the member as a whole.