The following observation relate to designing of laced column :1. Single lacing systems on opposite planes shall preferably be in the same direction so that one is the shadow of the other.2. Lacing bar should only be a flat.3. The slenderness ratio of the lacing bars for compression shall not exceed 180.4. Laced compression members are to be provided with tie plates of ends.Of these observations :

The following observation relate to designing of laced column :1. Sing

1.	The following observation relate to designing of laced column :1. Single lacing systems on opposite planes shall preferably be in the same direction so that one is the shadow of the other.2. Lacing bar should only be a flat.3. The slenderness ratio of the lacing bars for compression shall not exceed 180.4. Laced compression members are to be provided with tie plates of ends.Of these observations :
A.	1, 2, 3 and 4 are correct
B.	1, 3 and 4 are correct
C.	2 and 3 are correct
D.	1 and 4 are correct
Answer» E.

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