8.
In order to avoid tearing of the plate at edge, the distance from the center line of the rivet hole to the nearest edge of the plate in terms of dia. of rivet d should be equal to

9.
If shearing stress in nut is half the tensile stress in a bolt, then nut length should be equal to

10.
The maximum stress due to stress concentration in a bar having circular transverse hole, as compared to its static stress without hole will be

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