Yes. SDA bars can be extended using threaded couplers, allowing multiple hollow threaded bars to be connected to achieve the required drilling depth.
During installation, additional anchor bars can be added as drilling progresses. The threaded connection provides a continuous load-bearing connection between bar sections while maintaining the hollow passage required for flushing and grout injection.
The appropriate coupler type and length should be selected according to the SDA bar diameter, thread profile, and system requirements. Properly matched couplers help ensure reliable load transfer and maintain the mechanical performance of the complete anchor system.
This extension method makes SDA systems suitable for deep drilling, variable ground conditions, and applications where the required anchor length exceeds the standard bar length.
