A Rivet is around bar of steel or wrought iron provided with a head on one side & tail on the other side.
There are two types of riveted joints
1.Lap Riveted Joints
In Lap joints one member is placed above the other & both members are connected by rivet just like in the below image
2.Butt Riveted Joints
In butt joints 2 Members are kept aligned and another third member is used to join 2 members(Refer Below Picture)
IMPORTANT TERMS USED IN RIVETING
- Nominal Diameter- It is the diameter of the shank of rivet before riveting.
- Effective Diameter (Gross Diameter)- It is the diameter of the hole it fills after riveting.
- Pitch- It is the centre to centre distance of two adjacent rivets measured parallel to the direction of force.
- Diagonal Pitch- It is the diagonal distance between centres of 2 rivets.
- Gauge Line or Rivet Line- It is the line along which the rivets are placed. The perpendicular distance between the adjacent gauge lines is known as guage
- Margin- It is the distance between the centre of rivet hole to the nearest edge of plate.
- Tacking Rivets- are those rivets which are used to connect long lengths of members in the members of roof trusses. These are provided at suitable distance so that the members may act as one unit