RS25

Continuity connection system for precast concrete elements

The RS25 Continuity Connection is part of the B.S. Italia continuity connection systems and is a patented seismic-resistant system for connecting concrete structures.

The system guarantees the direct transfer of forces between two reinforcement bars and achieves perfect emulation of cast-in-place structures, contributing to the structural continuity of precast concrete elements.

APPLICATIONS OF THE RS25 SYSTEM

Structural connections between precast concrete elements

The RS25 system is designed to create continuity connections between:

• precast columns and foundation structures;
• two segments of a precast column;
• precast beams and precast columns.

The solution makes it possible to obtain structural continuity typical of cast-in-place concrete structures.

OPERATION OF THE RS25 SYSTEM

Direct transfer of forces between reinforcement bars

The RS25 Continuity Connection guarantees the direct transfer of forces between two reinforcement bars by means of the principle of adherence between reinforcement and metal sleeve.
The system exploits double adherence, internal and external, between reinforcement bars and metal sleeve.

Adjustment foot for the installation of precast elements

The system uses an adjustable device, known as an adjustment foot, placed dry between the concrete structures to be connected.

This device allows the precast elements to be installed without provisional shoring or support work.

The adjustment foot also participates in absorbing the forces both during the transitory phase and during operation.

ADVANTAGES OF THE RS25 CONNECTION SYSTEM

• Emulation of cast-in-place structures. The system makes it possible to obtain structural continuity equivalent to that of structures built by cast-in-place concrete.
• Seismic performance in continuity connections. The RS25 connection represents a particularly effective solution from the point of view of seismic performance thanks to the structural continuity obtained between the connected elements.
• Reduction of provisional support work. The use of the adjustment foot allows precast elements to be installed without resorting to provisional shoring or support work.
• Absorption of forces during installation and operation phases.The adjustable device participates in absorbing the forces both during the installation phase and throughout the service life of the structure

TECHNICAL DATA AND DESIGN SUPPORT

Sealing with B.S. Grout

The connection between the structures is completed on site by wet sealing using B.S. Grout.
The mortar, developed through the collaboration between Mapei and B.S. Italia, is a high-strength, doubly expansive mortar during setting and hardening, designed to confer high performance to the RS Continuity Connection