Unbonded Steel Strand Cable-Stayed Cable Technical Conditions JTT771-2009

Standard Overview

JT/T 771-2009 Technical conditions of unbonded steel strand stay cable is a transportation industry standard of the People's Republic of China. It specifies the technical conditions for stay cables made of unbonded steel strand, which are widely used as cable-stayed bridge stay cables and in other cable-supported structures. For PV flexible brackets, which belong to the same cable-anchor structural family as cable-stayed bridges, this standard is an important design and construction reference for anchor cable systems.

Why It Matters for Flexible PV Brackets

• It defines the structural composition and technical requirements of unbonded strand stay cables, including the strand, anchor and protection system.
• It provides acceptance criteria for manufacturing and installation quality of cable systems — directly applicable guidance for flexible bracket anchor cables.
• It is a reference for the design values, tolerance and inspection of unbonded strand cable products used in similar large-span tension structures.

Original Document

The full original standard document (Chinese) is available for download:

Download JT/T 771-2009 (PDF)