Question

Consider the following statements for a laced column:

1. The capacity of a laced column is taken as 1.05 times the actual capacity.

2. The lacing bar is designed for the condition that slenderness ratio should be less than 145.

3. Lacing are most effective when the angle of inclination of lacing bar with longitudinal axis is between 35${}^{\circ }$ to 45${}^{\circ }$.

4. For a single lacing system, the thickness of flat should not be less than 1/40th its effective length.

Which of the above statements are correct?

• A. 1, 2, 3 and 4
• B. 2, 3 and 4
• C. 1, 2 and 4
• D. 1, 2 and 3

Answer 1

The correct option is B 2, 3 and 4

The effective slenderness ratio of the laced column is taken as 1.05 the actual maximum slenderness ratio. As slenderness ratio increases, allowable compressive stress decreases. Thus capacity of laced column of taken lesser than the actual capacity.