There are two types of couplers. One is a single strand coupler, which can be used for single prestressed tendon connection or bundled prestressed tendon connection, and it can also be used for tool-type single prestressed tendon connection in the pre-tensioning structure.
Another is a multi-strand peripheral suspension extrusion type, and is mostly used in continuous beams. It includes the coupler block, wedges, protection cover, restraining ring, etc.
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