Types of rebar couplers

Standard coupler, which is also known as "right-hand thread coupler", is one of the most common and widely used types of coupler. The internal thread of the coupler is right-handed, that's why it is also called right-handed coupler. This coupler is used to connect rebars of the same size and is used in all parts of concrete structures. Provided that at least one of the bars inside it can rotate.

Screw coupler or locking screw coupler is a special type of mechanical patch. Using this coupler is the best way to continue short waiting rebars, repair and strengthen concrete, which makes the connection of rebars integrated. This coupler is used for rebars that are 20 cm and does not require threading in the rebar head. Also, there is no need to rotate the armature inside the coupler. The application of this type of connection is in prefabricated structures, piles, columns and beams.
The end of the armature inside the coupler is surrounded by two toothed buffers and the screws on the coupler are fixed on the armature. To implement the coupler type, only one standard wrench is needed.

This coupler is used to establish a connection between a rebar and a metal structure, such as connecting an A3 rebar that does not have good welding capabilities to a metal plate. This patch makes it possible to connect the reinforcement to the metal structure, and soft steel is used to make it, so it does not need heating for welding, and welding is done easily.

This type of coupler is used in places where none of the armatures can rotate. One side of the coupler has right-handed threads and the other side has left-handed threads, and the threads created at the end of the two rebars are right-handed and the other left-handed.

To build strong structures, more rebars are needed in concrete. Considering this issue, to use more rebars, smaller sections are used, which reduces the space and congestion of rebars in concrete. Also, the presence of ninety degree rebars creates problems that cause difficulty in concreting. To solve these problems and reduce the number of rebars used in concrete, they use an end coupler that reduces the hardness of concreting by 60%. This type of coupler is used in foundations, piles and columns.

This type of coupler is mostly used to build prefabricated structures such as beams, columns, walls, etc. In this type, we have two pieces, in the first piece, a part of the rebar head is taken out and threaded. In the second piece, the rebars are placed inside the coupler and the concrete covers the coupler so that it is completely hidden in the concrete. That part of the concrete that is grooved is placed on the coupler and the two pieces are placed on top of each other with pressure.

This type of coupler makes it possible to connect two armatures with different diameters. At first, the rebar with a larger diameter is closed and this coupler is placed between the two rebars and connects them together. Conversion coupler is in the middle coupler category.

This type of coupler has a male and female part and a locking nut. This coupler is used in places where two reinforcements are placed separately in two parts of the concrete structure and are not able to move.

This type of coupler is also called pressure sheath and it has the possibility of connecting to a rebar. A compression sheath is used for rebars with a diameter of 20 mm and more, which are under load pressure. Using this type of coupler in the structure makes the pressure load divided between the rebars and prevents them from breaking. This type of coupler is used to make rebar mesh network.