# Design of Steel Structures Questions and Answers – Battens

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This set of Design of Steel Structures Multiple Choice Questions & Answers (MCQs) focuses on “Battens”.

1. Which of the following statement is true?
a) Number of battens in a column should be such that member is divided into not less than three bays
b) Number of battens in a column should be such that member is divided into less than three bays
c) Number of battens in a column should be such that member is divided into less than two bays
d) No restriction on number of battens

Explanation: Battens are plates or any other rolled section used to connect the main components of compression members. Battens should be placed opposite to each other on the two parallel faces of compression members. Number of battens in a column should be such that member is divided into not less than three bays.

2. Battens should be designed to resist transverse shear force which is
a) 5% of axial force
b) 0.5% of axial force
c) 2.5% of axial force
d) 7.2% of axial force

Explanation: Battens should be designed to resist transverse shear force which is 2.5% of total axial force on whole compression member. This transverse shear force is divided equally in all parallel planes in which, there is shear resisting elements.

3. Battens should be designed to resist longitudinal shear equal to
a) Vt L0 ns
b) Vt L0 / ns
c) Vt /L0 ns
d) Vt L0n/s

Explanation: Battens should be designed to resist longitudinal shear equal to V = Vt L0 / ns , where Vt is transverse shear force, L0 is distance between centre-to-centre of battens longitudinally, s is minimum transverse distance between centroids of bolt/rivet group/ welding connecting batten to main member, n is number of parallel planes of battens.
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4. Battens should be designed to resist moment equal to
a) Vt L0 n
b) Vt L0 / n
c) Vt /L0 n
d) Vt L0 /2n

Explanation: Battens should be designed to resist moment equal to Vt L0/2n , where Vt = transverse shear force, L0 = distance between centre-to-centre of battens longitudinally, n = number of parallel planes of battens.

5. Which of the following is true about effective depth of battens?
a) less than perpendicular distance between centroids for end battens
b) less than three quarters of the perpendicular distance between centroids for intermediate battens
c) not less than twice the width of one member in plane of batten
d) less than twice the width of one member in plane of batten

Explanation: When plates are used for battens, effective depth between end bolts/rivets or welds should not be less than twice the width of one member in plane of batten, not less than perpendicular distance between centroids for end battens and not less than three quarters of the perpendicular distance between centroids for intermediate battens.

6. Thickness of batten plates shall be
a) not less than 1/50th of distance between innermost connecting transverse bolts/rivets
b) less than 1/50th of distance between innermost connecting transverse bolts/rivets
c) less than 1/60th of distance between innermost connecting transverse bolts/rivets
d) less than 1/80th of distance between innermost connecting transverse bolts/rivets

Explanation: Thickness of batten plates shall be not less than 1/50th of distance between innermost connecting transverse bolts/rivets or welds perpendicular to main member i.e. t > (1/50)(s + 2g), where g is gauge distance for particular section.

7. Which of the following is correct?
a) length of weld connecting each end of batten should be less than one fourth the depth of plate
b) length of weld and depth of batten shall be measured perpendicular to longitudinal axis of member
c) weld shall be returned only along other two edges for length less than minimum lap
d) length of weld connecting each end of batten should be such that at least one third of its length should be placed on each end

Explanation: Length of weld connecting each end of batten shall be more than half the depth of plate. Length of weld connecting each end of batten should be such that at least one third of its length should be placed on each end. Weld shall be returned only along other two edges for length less than minimum lap. Length of weld and depth of batten shall be measured along longitudinal axis of main member.

8. Effective slenderness ratio of battened column shall be ____ of actual slenderness ratio of column
a) 0.5 times
b) 1.1 times
c) 2 times
d) 2.5 times

Explanation: Effective slenderness ratio of battened column shall be 1.1 times the maximum actual slenderness ratio of column to account for shear deformation effects.

9. Maximum spacing of batten should be such that slenderness ratio of component member should be
a) not greater than 50
b) greater than 50
c) greater than 0.7 times slenderness ratio of member as a whole
d) greater than slenderness ratio of member as a whole

Explanation: Maximum spacing of batten should be such that slenderness ratio of component member should be not greater than 50 or 0.7 times slenderness ratio of member as a whole, about axis parallel to end of battens.

10. Which of the following is true about effective depth of end batten?
a) it should be less than distance between centre of gravity of component
b) it should be half the distance between centre of gravity of component
c) it should be less than twice the width of component member
d) it should be greater than twice the width of component member

Explanation: Effective depth of end batten should not be less than distance between centre of gravity of component and should be greater than twice the width of component member.

11. Depth of intermediate batten = _______ depth of end batten
a) 1/2
b) 3/4
c) 1
d) 2

Explanation: Depth of intermediate batten is taken as three fourth of the effective depth of end batten and should be more than twice the width of component member.

12. Thickness of batten should not be less than
a) 1/40th of distance between innermost connecting lines of bolts
b) 1/50th of distance between innermost connecting lines of bolts
c) 1/100th of distance between innermost connecting lines of bolts
d) 1/10th of distance between innermost connecting lines of bolts

Explanation: Thickness of batten should not be less than 1/50th of distance between innermost connecting lines of rivets/bolts/welds perpendicular to main member.

13. A laced column is_____ than battened column for same load
a) equally strong
b) weaker
c) stronger
d) cannot be compared

Explanation: A laced column is stronger than battened column for same load, unsupported length and end conditions.

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