Connections can be classified into 3 categories:
1- The classification according to moment strength is grouped under 3 sections such as full strength, partial strength and hinge.
2- According to rotational rigidity, it is divided into 3, which are rigid, semi-rigid and hinged.
3- According to the rotational capacity, it is classified as highly and moderately ductile.
The computational rules related to moment-resisting and hinged connections are explained in the relevant sub-sections.