These connections are particularly used when continuity between the members of the building frame is required to provide more flexural resistance and reduce lateral deflection due to wind loads. In this type of connection both the webs and flanges are connected. In this connection greater than 90% moment can be transferred with full transfer of shear and other forces
These connections have rigidity less than 90%. The original angles between the connected members may change up to a certain limit after the application of loads. These connections can transfer some percentage of moment along with full shear force.
These connections have less than 20% rigidity. These are considered flexible and beams become simply supported. In this case only the web is connected with the other member because most of shear stresses are concentrated in the web.
These types of connections provide rigidity in between fully restrained and simple connections and approximately 20% to 90% moment compared with ideal rigid joint may be transferred. These type of connections are mostly used in practice because their performance is exceptionally well under cyclic loads and earthquakes
These are the connections which used to transfer moment besides other type of forces. The term bracket is generally used for an extra plate projecting out of column and acting like a seat for the beam.