The groove plate belongs to the end grain.

As early as 2012, SHERPA was the first supplier of standardized connectors for main and secondary beam connections, which relied exclusively on the helical screw connection.

We did not settle for a pure oblique fitting at 45 °, but added a horizontal angle of 15 ° for every other pair of screws.

When positioning the individual screws in the connector plates, not only the performance but also the safety aspect plays a role. Thus, the spring plate is optimally adapted to the needs of main beams and columns.
For the grooved plate are the characteristics of the end grain taken into account. There is no tearing of the cross-section due to the screw positioning and alignment.

Nutplatte am Hirnholz
In SHERPA the groove plate always comes at the end grain of the joist to accomplish the optimum in safety and performance.

Compared to the spring plate, the grooved plate has a up to 30% higher number of screws and thus excludes a failure under load.

The advantages of permanently assigned connector plates are:
  • the higher number of screws in the end grain excludes failures in this area
  • a screw arrangement optimized for the wood fiber provides more power with less splitting forces
  • better conditions if a fire breaks out