The stressing anchorage set (BEM) can be used either at the fixed or stressing end of PT work. The steel strands through this anchorage set need to be first pulled by the jack and then fixed with the wedges such that the PT can be transmitted to the concrete structure via the casting plate. The BEM Type A set transfers the PT into the concrete by the casting plate with a single plane.
BEM Type B has the same function as type A. The BEM Type B set does so by the casting plate with multiple planes. Another difference between these two types is that the bearing area of Type B is smaller than that of Type A.
The fixed-end anchorage set (BEF) is designed to be buried in the concrete with no need of stressing. Its anchor head is pre-assembled by the wedges, springs, and spacers. The BEM Type A set transfers the PT into the concrete by the casting plate with a single plane.
BEF Type B has the same function as type A. The BEF Type B set does so by the casting plate with multiple planes. Another difference between these two types is that the bearing area of Type B is smaller than that of Type A.