The distance between centres of rivert holes should not be less than -
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A.
3 times the diameter of the holes
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B.
2.5 times the diameter of the holes
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C.
2 times the diameter of the holes
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D.
3.5 times the diameter of the holes
Correct Answer:
B. 2.5 times the diameter of the holes
Explanation:
In structural engineering and aircraft sheet metal work, the minimum spacing between the centers of rivet holes—often referred to as the pitch—is established to maintain the structural integrity of the joint. According to standard practices and FAA guidelines (such as AC 43.13-1B), the distance between the centers of adjacent rivets should be no less than 3 times the diameter of the rivet hole. This spacing prevents the metal from weakening or tearing between the fasteners, while a maximum spacing is also typically observed to prevent the sheets from separating or buckling. Therefore, 3 times the diameter of the holes is the required minimum distance.
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