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Question
Consider the following statements:
1.As far as practicable, the lacing system shall not be varied throughout the length of the strut 
2.Single laced systems on opposite sides of the components shall preferably  be in mutually opposite directions, so that one is not the shadow of the other. 
3.Rolled sections or tubes of equivalent strength may be used as lacing bars instead of  flats.
Which of the statements given above are correct ?
A.
1 and 2
B.
1 and 3
C.
2 and 3
D.
1, 2 and 3
Answer ( Option C)

2 and 3

Solution

According to IS 800-1984

• As far as practicable, the lacing system shall not be varied throughout the length of the strut

• Single laced systems on opposite sides of the components shall preferably be in the same direction so that one be the shadow of the other. 

• Rolled sections or tubes of equivalent strength may be used as lacing bars instead of flats.

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