Kinds of joints and splices?

Answer 1

1.PIG-TAIL JOINT
2.TEE JOINT
3.TOP JOINT
4.WESTERN UNION JOINT

Answer 2

dado joints

Answer 3

kinds of joints andsplices

Answer 4

There are all manner of joints and splices used in wood, furniture making. Can't really address that other than to say scarf joints and a lot of other joint types exist, though they are more commonly called 'joinery' in my experience.
Structurally, in wood, there are finger-joints (code allowed /good only for compression).
Most materials have bearing as one means of making a joint - setting a piece on top of another piece. Typically some other kind of connection (nails, rods) are used to hold the pieces in place and keep them from sliding, but the force is considered to transfer through the pieces in bearing.
In steel there are moment splices, shear splices and other joints (simple connections , moment connections, column splices), and so on, they are used to keep the building together without falling down while at the same time making the pieces small enough to ship, assemble, or lift, as well as gett them into the fabrication shop to drill holes for other connections, hoisting lines, safety cables, or cut (block, cope) pieces off to make the pieces fit together, etc.
In concrete there are moment / shear splices, but usually the limiting element here is not shipping but the length of the reinforcing bars, or how much weight of concrete can be resisted, how much concrete can be poured, etc. There are also cold joints where they simply pile the concrete from one day on one side and the next day pour fresh concrete against the hardened concrete from the day before. These aren't structural joints, but they are considered joints. Other types are construction joints and contraction joints, which are used to limit cracking of a concrete slab.
Expansion joints, used to allow the structure to expand or contract in the heat / cool of the seasons are used in larger structures and bridges to keep them from damaging themselves when they expand or contract from the temperature.
Bridges employ a large variety of bearings to allow the bridge to move slightly (again, because of heat/cold), and they are periodically inspected to ensure they are functioning properly and not jammed / stuck / or rusting.**strong text**