BSF 225 kN, Beam-column connection

The connector is suitable for both beam-to-column and beam-to-beam applications. It has a maximum vertical load capacity of 225 kN, a minimum column width of 240 mm and a minimum beam dimension of 190 x 370 mm.

Function and Design

The BSF 225 system consists of three main components: a beam unit cast into the supported beam, a column or beam-to-beam receiving unit cast into the supporting element, and a solid steel sliding knife that transfers the load between the units.

During erection, the knife is retracted and protected inside the beam unit. Once the beam is correctly positioned, the knife is extended into the receiving unit. The load is then transferred through the steel knife and into the specified anchoring reinforcement in the precast elements.

Materials and Finish

The main load-bearing components of the BSF 225, including the blade and semi-circular bearing plates, are manufactured from S355 steel, with grade 8.8 threaded rods. The recess boxes are manufactured from thin sheet steel and supplied in standard finish.

Applications

BSF 225 is designed for heavy-duty connections between precast beams and columns, beams and walls, or two beams. The corbel-free arrangement is particularly useful where architectural appearance, clear headroom, efficient formwork and flexible column geometry are important.

Installation and Fire Performance

The telescopic design supports fast and safe erection because the knife remains inside the beam unit until the beam is in position. After installation, the connection can be protected by the surrounding concrete and completed in accordance with the project-specific fire-protection design. The steel components have reaction to fire Class A1 according to EN 13501-1.

Documentation and Design

Technical memos cover capacities, main dimensions, reference levels, tolerances, torsion, expansion joints, seismic design proposals, reinforcement design and installation guidance. A dedicated BSF calculation tool is also available for structural design.

BSF products are manufactured under CE-marked production in accordance with EN 1090. The declared BSF 225 vertical load capacity is 225 kN, based on minimum concrete strength class C35/45 and project-specific reinforcement design.

Design and reinforcement must be verified for the actual beam, supporting element, loads, tolerances and project conditions using the current technical documentation.