Post Tension Anchor Wedges

Key performance

The performance of Post Tension Anchor Wedges directly determines the structural safety and durability of major projects such as bridges and buildings. Choosing Xiaoguo®, you will obtain a reliable guarantee that can withstand the most stringent standards.

（1）Static load anchoring efficiency

Efficiency coefficient ηa ≥ 0.95

Whether the anchoring system can efficiently utilize the full strength of the steel strands

（2）Ultimate total strain

εapu ≥ 2.0%

Measures the ductility of the anchoring system under the ultimate state to prevent brittle failure

（3）Fatigue performance

No failure after 2 million cycles of loading

Ensures that the structure, such as bridges and wind turbine towers, which are subjected to long-term dynamic loads, will not fail due to fatigue.

（4）Friction loss in the anchorage area

Total loss at the anchor opening + trumpet opening ≤ 6%

Reduces the loss of effective prestress caused by friction, affecting the tensioning efficiency and cost control.

（5）Retraction amount of the wedge block

Low retraction anchor ≤ 0.5mm; Ordinary anchor ≤ 6mm

This directly affects the accuracy of prestress establishment. The smaller the retraction, the less the prestress loss during establishment.

（6）Hardness requirements:

Post Tension Anchor Wedges: HRC 58-65; Anchor plate: HB ≥ 251

Ensure that the surface of the parts is wear-resistant and will not deform or collapse under great pressure.

Classification

The Post Tension Anchor Wedges can be further classified into many types. The main classification criteria are based on the number of pieces, the form of the internal teeth, and the shape of the outer cone. The corresponding structural features and uses

【1】the number of pieces

（1）Two-piece

Structural Characteristics：Two symmetrical wedge-shaped clamping plates, when combined, form a circular hole in the middle

Typical Applications：Permanent working anchor, for one-time use

（2）Three-piece

Structural Characteristics：Three wedge-shaped clamping plates evenly divided, with gaps between them, requires a spring coil for coordination

Typical Applications：Tool anchor, reusable

【2】the form of the internal teeth

（1）Circular teeth

Characteristics：The Post Tension Anchor Wedges has multiple independent circular protruding teeth, with sharp tooth tips.

Applicable steel strands：Standard steel strand (1×7 structure)

（2）Spiral thread

Characteristics：Continuous spiral internal thread

Applicable steel strands：High-strength steel wire bundle or special prestressed reinforcement

（3）Combination type

Characteristics：Circumferential teeth + Longitudinal grooves

Applicable steel strands：Enhances chip removal and engagement performance

【3】the shape of the outer cone

（1）Single conical surface

Conical surface characteristics：The entire surface has a single taper (the most common)

（2）Double conical surface

Conical surface characteristics：There is a small-angle transition near the large end, improving the distribution of forces

（3）With guiding section

Conical surface characteristics：A cylindrical guiding section extends from the small end, facilitating the initial insertion