Description：Prestressed concrete used in the permanent  anchoring device is in post-tensioned structures or components,Website: , in order to  maintain the tension tendons and passes it to the inside of concrete anchoring  tool, also known as Anchorage.Classification of anchorage：(1)Round anchorage specifications expressed  as: YJM15-N or YJM13-N; This type of anchor has a good self-anchored  properties. Tension generally use feedthrough jack.(2)Flat anchorage Specification expressed  as: BJM15-N or BJM13-N (B, flat anchor Pinyin first letter, on behalf of flat  anchorage means); flat type is mainly used for deck transverse prestressing  anchor, hollow plate low altitude Box, so that the stress distribution is more uniform and reasonable further thinning structure thickness.(3)Bond-type anchor (fixed end anchorage)  specification model is expressed as: JYM15-N or JYM13-N; applies to member end  fabric design stress greater or end space is limited situations, it uses an  extruder extrusion sleeve pressure on the knot in a strand bond-type anchor, it  is embedded in the concrete, arranged according to need, to the design strength  of concrete after solidification, during tensioning.