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The slenderness ratio of lacing bars should not exceed:

  • A.120
  • B.145
  • C.180
  • D.100

Answer: B

The slenderness ratio of lacing bars should not exceed 145.

IS 800 limits the slenderness ratio of lacing bars in laced compression members to 145, so that the lacing, which acts as a small strut carrying the transverse shear, does not buckle before the main member.

180 is the general limit for members carrying compression due to dead and imposed loads, so it is the trap; 120 and 100 are not the code's limit for lacing.

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