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31.

The best arrangement to provide unified behavior in built up steel columns is by

A.	lacing	B.	battening
C.	tie plates	D.	perforated cover plates

32.

If the 20 mm rivets are used in lacing bars, then the minimum width of lacing bar should be

A.	40mm	B.	60mm
C.	80mm	D.	100mm

33.

The use of tie plates in laced columns is

A.	prohibited	B.	not prohibited
C.	permitted at start and end of lacing system only	D.	permitted between two parts of the lacing

34.

Lacing bars in a steel column should be designed to resist

A.	bending moment due to 2.5% of the column load	B.	shear force due to 2.5% of the column load
C.	2.5% of the column load	D.	both (a) and (b)

35.

Angle of inclination of the lacing bar with the longitudinal axis of the column should preferably be between

A.	10° to 30°	B.	30° to 40°
C.	40° to 70°	D.	90°

36.

The effective length of a battened column is increased by

A.	5%	B.	10%
C.	15%	D.	20%

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