1. Topin has preset back bolts, and it is possible to use the large plate UHPC as a dry-hanging system.
2. When the UHPC plate is preset in the factory, the Topin preset back bolt is buried in the plate as required to wait for epoxy. After the epoxy is finished, the aluminum pendant is installed to dry the plate.
3. The height of the preset back bolt is the same as the embedment depth of the plate, thereby avoiding the bump of the conventional pre-buried sleeve. This greatly solves the plate damage caused by the raised bumps in subsequent transportation.
4. Topin's preset back bolt uses the mature rear anchoring principle, which has superior performance, high safety and low cost.