Single riveted lap joint: This is the simplest and most commonly used type of joint. This joint is useful for joining both thick and thin plates. In this, the plates to be joined are overlapped at the ends and single row of rivets is placed in the middle of the lap.

Double riveted lap joint: This type of joint will have two rows of rivets. The overlap is large enough to accommodate two rows of rivets.

Sheet metal work is carried out only on metal sheets, which are rolled.

Advantage of aluminium sheets
1. Lightweight
2. Strong
3. Aluminium sheets are corrosion resistant
4. Malleability