Q.

Why is double cover butt joint preferred over single cover butt joint or lap joint?

A. bolts are in single shear
B. eliminates eccentricity
C. bending in bolts
D. shear force is not transmitted
Answer» B. eliminates eccentricity
Explanation: double cover butt joint preferred over single cover butt joint or lap joint because (i) eccentricity of load is eliminated, hence no bending in bolts, (ii) total shear force to be transmitted is split into two parts, hence bolts are in double shear.
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