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As per IS: 800-1984 specification, how to calculate the gross diameter of a rivet? (If diameter of the rivet is less than or equal to 25 mm.)

As per IS: 800-1984 specification, how to calculate the gross diameter of a rivet? (If diameter of the rivet is less than or equal to 25 mm.) Correct Answer Nominal diameter + 1.5 mm

As per IS 800-1984 clause 3.6.1.1,

In making a deduction for rivets less than or equal to 25 mm in diameter, the diameter of the hole shall be assumed to be 1.5 mm in excess of the nominal diameter of the rivet unless specified otherwise. If the diameter of the rivet is greater than 25 mm, the diameter of the hole shall be assumed to be 2.0 mm in excess of the nominal diameter of the rivet unless specified otherwise.

Important Points

In making a deduction for bolts, the diameter of the hole shall be assumed to be 1.5 mm in excess of the nominal diameter of the bolt, unless otherwise specified.

For countersunk rivets or bolts, the appropriate addition shall be made to the diameter of the hole.

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