1. Summary
The Mosaic Complex Type Expansion Joint (DBFR) was developed by assembling Mosaic finger plates over Rail type expansion joint. It has the same operation principle as Rail Type Expansion Joint. Mosaic Finger Plate is applied to the top of rail beam in order to reduce noise. So, it reduces noise by distributing load and noise. It is applicable to all bridge types ranging from small bridges to very long span bridges, and supports field-tailored all-in-one product.This expansion joint is capable of minimizing structure damage through its free expansion & contraction and rotation in all directions (longitudinal, transversal, and vertical directions).
2. Features
Since Mosaic Finger Plate is applied, this expansion joint provides far better vehicle driving than Rail Type Expansion Joint. The waterproof rubber seal between rail beams is put in the rail groove processed in the same way as a rubber seal, playing its waterproof role perfectly. So it secures the durability of the lower structures of bridge. The spacing system installed on the bottom of rail beams equally distributes the whole expansion behavior. For the semi-permanent use of structural steel parts, elastic parts with exnt attenuation are applied. It is possible to make continuous use only by replacing parts. Mosaic Complex Type Expansion Joint uses only the parts that passed strict tests. So, it is possible to endure various environmental and sical conditions during the endurance life of bridge. In addition, the expansion joint is applicable regardless of a bridge type. In short, it is usable without the limitation of expansion length (at least 50 mm).The gap between mosaic finger plates rail beams is max. 80-100mm according to field conditions. The of rail beams and the of waterproof rubber seals depend on expansion length.Expansion & contraction and rotation in all directions (longitudinal, transversal, and vertical)Full waterproof functionCustomized designInstallation in all types of bridgesElastic parts with exnt load attenuationApproved high-quality materialsMosaic finger plate installation for low noise effect and bike-wheel sticking prevention
3. Waterproof
For the implementation of the perfect waterproof function of expansion joints, waterproof rubber seals are put in the rail grooves processed in the same way of rubber seals. So, water leak is perfectly prevented. It is easy to assemble and repair the diamond-shaped waterproof rubber seals that have the exnt function to prevent water from leaking to the bottom of an expansion joint.
4. Anti-corrosion
As for the surface treatment of structural steels, hot dip galvanizing is applied to prevent salt stress and corrosion in accordance with KS D 8308 Standards. Compared to coating, this treatment guarantees exnt corrosion-resistance and adhesion. The thickness is 85μm, ensuring about 45 years of endurance.
