Which of the following is true?(a) when there is small spacing between the two sections placedback-to-back, washers and packing should be provided(b) when there is small spacing between the two sections placedback-to-back, washers and packing should not be provided(c) there should be additional connection in between along the length of member(d) when leg of angles greater than 125mm wide or web of channel is mm wide, minimumbolt is sufficient for connectionThe question was posed to me in class test.My doubt stems from Back-to-Back Connection topic in portion Design of Compression Members of Design of Steel Structures

Which of the following is true?(a) when there is small spacing between

1.	Which of the following is true?(a) when there is small spacing between the two sections placedback-to-back, washers and packing should be provided(b) when there is small spacing between the two sections placedback-to-back, washers and packing should not be provided(c) there should be additional connection in between along the length of member(d) when leg of angles greater than 125mm wide or web of channel is mm wide, minimumbolt is sufficient for connectionThe question was posed to me in class test.My doubt stems from Back-to-Back Connection topic in portion Design of Compression Members of Design of Steel Structures
Answer» The correct choice is (a) when there is small spacing between the two SECTIONS placedback-to-back, washers and packing should be provided The explanation: There should be minimum of two additional connection in between, SPACED equidistant along the length of member. When there is small spacing between the two sections placedback-to-back, washers(in case of bolts) and packing(in case of WELDING) should be provided to make connection. When leg of angles greater than 125mm wide or web of channel is MM wide, minimum two bolts/rivets should be for connection.

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