Machine Design
According to I.B.R., the distance between the rows of rivets, for equal number of rivets in more than one row for lap joint or butt joint (chain riveting) shall not be less than

2 d
2.5 d
1.5 d
d

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Machine Design
The creep in the belt is due to

Stresses beyond elastic limit of belt material
Material of belt
Unequal extensions in the belt due to tight and slack side tensions
Effect of temperature on belt

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