Modular Expansion Joint Systems (MEJS)
BAS Expansion Joints (NZ)™ have available an extensive range of proprietary and custom MEJS available. Both WABO® and TechStar™ Inc. are leaders in the design and manufacturing of this type of joint with hundreds of successful installations throughout the world. All our products are manufactured according to the New Zealand Bridge Manual v.3 and the relevant NZ/AS standards and requirements. We can provide a 15 year materials defect warranties as needed.
The Modular Expansion Joint System (MEJS) is a mechanical device installed in bridge expansion joint openings. The primary function of the MEJS is to permit vehicle traffic to travel smoothly across large expansion joint openings. It does this by dividing the large expansion joint openings into a series of smaller openings called cells. These cells work in series to accommodate the necessary thermal bridge movement (expansion and contraction) while providing a smooth riding surface for bridge vehicle traffic. The MEJS is normally used for expansion joints with a movement range exceeding 75 mm.
The MEJS also has the secondary function of protecting the surrounding bridge superstructure and substructure. All MEJS cells are equipped with watertight sealing elements that prevent debris, water, and corrosives such as de-icing chemicals from passing through bridge expansion openings and damaging superstructure and substructure components.
For noise restricted areas, or where traffic noise is a significant factor in the joint selection process, we have the option of noise reducing sinus plates that can either be included in the original design, or installed on an existing, problematic installation to significantly reduce the noise created by vehicles traversing the MEJS joints..
Feel free to contact us to discuss your Modular Expansion Joint requirements. Our technical team are able to assist you with design specifications, installation recommendations and onsite inspections as needed.
TechStar noise reducing 'Sinus Plates' add-on option