Pre-stressed anchorage devices are used in post-tensioned structures or components to maintain the tension of the prestressing steel and transfer it to the concrete interior. These anchorage devices mainly consist of anchor sleeves, wedges, and anchor pads, and can be further divided into anchor sleeves, wedges, anchor pads, and spiral reinforcement. Among them, the wedges are the key part of the anchorage, which are externally categorized as working wedges and tool wedges, and can be reused during use.

In addition to tension end anchor bolts and fixed end anchor bolts, the types of anchors for prestressed tendons include screw-end rod anchors, nut-end rod anchors, upsetting anchors, and more. After installation, these anchors are typically embedded in concrete, serving to stabilize and reinforce the structure.