The beam-to-beam joints are hinges.
The first type (Bf1) ha a coping applied to the secondary beam, and a FIN plate which is welded on one side and bolted to the other. It can be applied to master having the following cross-section types: rolled I or H also with unequal flanges; welded I or H; welded or rolled hollow box; UPN, PFC and welded U; welded T and rolled T. It can be applied to slaves having the same types, with the exception of rectangular boxes.
The second type does not have a coping applied to the secondary beam, and that the FIN plate has not the total depth of the main beam (BF1).
The third type (BF2) is like the previous but the plate has the complete depth of the master element. This type is chosen when the depth of the two members is similar.
The fourth type has an end-plate welded to the secondary beam extremity (BE1). The first sub-type has the end-plate having the full inner depth of the master member.
The fifth type is similar to the previous one, but the plate is not extended along all the depth of the master element (BE2).
The sixth type is like BE1, but when the angle is not 90° (BE3).
The seventh type is like BE2, but when the ange is not 90° (BE4).
Other types using FIN plate use slotted holes and are used for expansion joints, when an axial release is applied.