In this type of tie rod, the tensile-resistant element consists of 7-wire Wire Ropes, 6 of which are steel wires of the same nominal diameter, strung together through a helical twist, with a uniform pitch around a central wire. The supply of the Wire Ropes follows the classification of the ABNT NBR-7483 standard – Steel Wire Ropes for prestressed concrete, according to their tensile strength (kgf/mm²) and the type of behavior regarding relaxation, which may be RB or RN.
