A rivet is made out of a round bar of steel or wrought iron, one end is formed into rivet head. The other part is known as the stem or shank. Rivet are manufactured in different lengths to suit different purpose. Size of rivet is expressed by the diameter of the shank. In the process of riveting, the tail end of the rivet is formed as head by the process of forging.
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| Rivets Joint |
(1) Shop Rivets
(2) Field Rivet
(3) Hot driven Rivet
(4) Cold driven Rivet
(1) Shop Rivets : For fabrication when rivet are driven in the fabricating shop are known as shop rivet. These are driven by a riveting press which simply squeezes the hot rivet into a tight fit by exerting a large pressure. Shop rivets are stronger than field rivets and are therefore, more economical and give better results.
(2) Field Rivets : Rivet driven in the field i.e. at site during the erection of structure are called field rivets. These are driven by hand operated pneumatic riveting hammer. There is comparatively less control in the of fabrication, hence less strength of joint as compared to shop rivets.
(3) Hot Driven Rivets : In this case, a properly heated rivet is inserted in a hole in the connection to be riveted and then, the pressure is applied in order to force the heated mental to expand in the hole and to form the driven head.
(4) Cold Driven Rivets : In this case, the rivets are not heated at all but are driven or squeezed to fill the holes and formed head by application of large pressure.
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