Civil MDC

Specification for Unbonded Single-Strand Tendon Materials (ACI 423.7-14) 2

Specification for Unbonded Single-Strand Tendon Materials (ACI 423.7-14)


The following definitions govern in this specification. See “ACI Concrete Terminology” for additional definitions. http://www.concrete.org/Tools/ConcreteTerminology.aspxanchorage—a device used to maintain elongation in prestressing strand by transferring compression force to concrete.

Architect/Engineer—the architect, engineer, architec-tural firm, or engineering firm developing Contract Docu-ments or administering the Work under Contract Docu-ments, or both. Contract Documents—a set of documents supplied by Owner to Contractor as the basis for construction; these documents contain contract forms, contract conditions, specifications, drawings, addenda, and contract changes.coupler—a mechanical device that connects ends of two strands together, thereby creating a continuous tendon by transferring the post-tensioning force from one strand to the other strand .encapsulated tendon—a tendon that is completely enclosed in a watertight covering from end to end, including anchorages, sheathing, post-tensioning coating, sleeves, and an encapsulation cap over the strand tail at each end.

encapsulation cap—plastic cap filled with post-tensioning coating that provides a watertight connection to all anchorages protecting the wedges and the tendon tail from moisture infiltration. The watertight connection shall include a mechanical interlock of a type that does not rely on friction alone to be held in place.fpu—specified tensile strength of prestressing steel, psi (MPa).fixed anchorage—anchorage located at end of tendon where stressing of tendon is not required (also known as dead-end anchorage).installation drawings—drawings showing information about the specifics of the post-tensioning system and tendon placement such as the number, size, length, marking, loca-tion, elongation, and tendon profiles (also referred to as shop drawings).intermediate anchorage—anchorage located between the ends of the tendon for application of post-tensioning force,

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