(1) Cutting Prestressing Tendons: Use a grinding wheel saw for cutting prestressing tendons. Arc cutting must not be used.

(2) Strand Bundling: When bundling steel strands, straighten them one by one and bind them into a neat bundle to avoid tangling. For fixed-end extruded or button-head anchors, assemble them beforehand with the bearing plate and spiral reinforcement.

(3) Equipment Maintenance: Tensioning equipment and gauges must be regularly maintained and calibrated.

(4) Pre-tensioning Concrete Check: Before tensioning, obtain the concrete compressive strength test report. Tensioning may only proceed after the concrete’s compressive strength meets the design requirements and is not less than 75% of the design strength grade.

(5) Bearing Plate Inspection: Before tensioning, clean the bearing plate surface and inspect the concrete behind it. If voids are found, repair them with epoxy mortar before tensioning.

(6) Anchor Installation: Align the anchor plate correctly during installation. Tighten the wedges evenly, but avoid excessive hammering which could damage them.

(7) Large-tonnage Tensioning Trial: For large-tonnage prestressing tendons, conduct a trial tensioning with specialists beforehand. Proceed with batch tensioning only after confirming the tensioning process is sound, elongation values are normal, and no harmful cracks appear. Measure actual duct friction losses if necessary. Avoid using small jacks for single-strand tensioning of curved tendons to prevent unnecessary prestress losses. Operators must stand in safe areas during tensioning, taking protective measures, and must never stand ahead of the tendon being tensioned or already tensioned.

(8) Tensioning Procedure: Apply load from zero to the initial force corresponding to the elongation measurement start point, then increase load stepwise to the required tensioning force.

(9) Tensioning Control: Manage tensioning by stress control, verified by elongation. The allowable deviation between actual and calculated elongation is -5% to +10%. If exceeded, pause tensioning; resume only after implementing corrective measures. If elongation is insufficient, overtensioning may be applied, but the tension force must not exceed 0.8fptk. For multi-wave curved tendons, overtensioning and release techniques can be used to increase stress at internal supports and reduce stress at the anchor mouth after tensioning.

(10) Grouting Operations: Grout ducts must be fully filled. The cement grout strength grade should not be lower than C40. Before grouting, ducts should be moistened and cleaned. Grouting must proceed slowly, uniformly, and uninterrupted, ensuring venting. If a blockage occurs, replace the grouting inlet, but first expel the initially injected grout to prevent air pockets. After filling the duct and sealing vents, maintain a pressure of 0.5-0.6 MPa briefly before sealing the grout inlet. Grouting pressure for vertical ducts should be determined based on grouting height.

(11) Continuous Span Grouting: For ducts connected by couplers across multiple spans, grout each span after it is tensioned. Do not grout all spans in a single operation after full tensioning.

(12) Anchorage Protection: The exposed length of the tendon after anchoring should preferably be no less than 30 mm. Protect anchors with end sealing concrete. For permanent exposure, take anti-corrosion measures. If rust is present on strands, thoroughly clean the anchorage grip zone and the external end of the strand of rust and contaminants to prevent slippage caused by clogged wedge grooves.

(13) Tool vs. Work Wedges: Tool wedges are three-piece; work wedges are two-piece. They must not be mixed. Work anchors must not be used as tool anchors or reused as such.

(14) Anchor Handling and Care: Store anchors properly. They must be free of rust, water, and other contaminants during use. Working wedges can be used directly after removing the packaging foam. For long tendons requiring repeated tensioning/anchoring, applying a small amount of lubricant (e.g., release agent) to the anchor plate cone facilitates wedge seating and release, and aids repeated anchoring. Lubricate tool wedge surfaces and anchor plate cone surfaces before use; clean wedge surfaces regularly to ensure easy release. Replace cracked or damaged wedges immediately; do not reuse them.

(15) Tensioning Safety: Implement safety measures during tensioning. No personnel should stand behind the tensioning jack.

(16) System Compatibility: Use the anchorage system as a complete set; do not mix with components from other systems. For static load tests, clean wedges with organic solvent (e.g., gasoline) and wipe off anti-rust oil from anchor plate holes, as residue can affect anchorage performance.

(17) Qualified Personnel: Prestressing work must be performed by specialized construction teams, and personnel must be professionally trained and certified.