Transitional devices or expansion joints (often called comb-finger devices), meaning bridge transition devices, consist of a series of comb modules, made by steel casting or machining from steel plates (no welding of parts). The mass and dimensions of the module are optimized to be easy to manipulate and transport.

The basic purpose of transition devices is to enable unhindered movements of the face of the span assembly and to bridge the gap between the face of the building and the abutment, so that traffic can proceed smoothly.

By filling structural holes in the bridge construction, transitional devices must satisfy safe load transfer, solid structure of components, low wear, constant adaptation against deformations, watertightness, use of materials resistant to aging, corrosion and wear, durability and simple maintenance.

The steel modules are attached with high-value screws to the steel substructure, which is anchored into the structure of the abutment or span assembly of the bridge. Between the steel comb modules and the steel substructure, an EPDM reinforced rubber seal, reinforced with canvas, is installed, which ensures the watertightness of the transition device. The advantage of these modules is their replaceability on the construction site in case of damage.

Through constant factory control of all production processes and the use of high-quality materials, Diorit offers high quality transitional devices and bearings.

Diorit d.o.o. is able to offer tuned massive shock absorbers for bridges and expansion joints-transitional-comb devices (Bridge Expansion Technology). By using the technology of tuned mass dampers for bridges, vibrations from various sources (wind, earthquake, traffic, etc.) can be significantly reduced.

Standard rubber bearings, cup bearings and spherical bearings are available. For special cases, engineers in cooperation with our company can design tailor-made solutions. The design and delivery of bearings for bridges and expansion joints-transitional-comb devices is carried out together with our partner companies relevant in the world.