Expansion Devices

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Modular expansion device

The Modular Expansion Joint System is a mechanical device installed in bridge expansion joint openings. The main function is to allow the vehicle to travel smoothly through large expansion joint openings. It does this by dividing the large expansion joint opening into a series of smaller openings called cells.


The modular expansion joint from Minka has completed the design of expansion capacity of 80-2000mm, which can be used for all kinds of new bridges and for the replacement of expansion joints of old bridges. Modular expansion joints consist of multiple parts to provide greater movement. Modular expansion device is designed with the necessary movement capabilities and application areas in mind. These nodes may be displaced when single-span bridges are used, exceeding the bearing capacity of the nodes.


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Product Detail

Features of modular expansion joint:

Ensure the displacement of freedom;

Provide continuous transportation bearing surface;

Reduce noise and anti-seismic;

High waterproofing performance and excretory system.


DESIGN PARAMETERS

Modular expansion device


ModelDisplacement(mm)Distance from bearing center to beam endWidth of expansion deviceExpansion gapPrefabricated installation groove
aminamaxCminCmaxhb
MZL-8080-8016050130≥250300
MZL-1601609016032080240≥250340
MZL-24024090240480160400400380
MZL-320320100320640220540450440
MZL-400400100400800300700450500
MZL-480480100480960380860450560
MZL-5605601155601120430990450640
MZL-64064011564012805101150450700
MZL-72072011572014405901310500760
MZL-80080014080016006201420500820
MZL-88088014088017607001580500880
MZL-96096014096019207801740500940
MZL-104010401651040208081018505001000
MZL-112011201651120224089020105001060
MZL-120012001651200240097021705001120
MZL-1280128016512802560105023305501160
MZL-1360136016513602720113024905501200
MZL-1440144016514402880121026505501240
MZL-1520152016515203040129028105501280
MZL-1600160016516003200137029705501320
MZL-1680168016516803360145031305501360
MZL-1760176016517603520153032905501400
MZL-1840184016518403640161034505501440
MZL-1920192016519203840169036105501480
MZL-2000200016520004000177037705501520

What is the purpose of expansion joints?

An expansion joint or motion joint is an assembly designed to hold parts together while safely absorbing temperature-induced expansion and contraction of building materials and vibration, or to allow movement due to ground subsidence or seismic activity.


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