Introduction to Expansion Joints

 

Expansion joint devices are widely used in various types of public buildings and structures, effectively responding to deformations and displacements caused by external factors such as temperature and humidity.They are necessary components to prevent buildings from cracking, damaging, or even collapsing, significantly improving the practicality, durability, and safety of buildings.

 

In the absence of relevant standards for the widespread use of expansion joints, based on years of successful experience and reference to foreign materials, Lianheqiang Company invented the first domestic expansion joint testing instrument and testing method in 2004.In collaboration with the China Academy of Building Research, they compiled and published the first industry standard in China, the "Expansion Joint Construction Atlas," designing according to specific usage locations and actual conditions.

 

1. Floor and ground plane type expansion joints;

2. Floor and ground corner type expansion joints;

3. Floor and ground load-bearing type expansion joints;

4. Roof plane type expansion joints;

5. Wall plane type expansion joints;

6. Wall corner type expansion joints;

and six major types with over 40 structural designs;

 

Lianheqiang Company, combining experience with window and curtain wall sealing strips, has detailed designs for

1. Expansion joint components - elastic sealing strips;

2. Curtain wall expansion joint components - single-layer accordion panels;

3. Curtain wall expansion joint components - double-layer accordion panels;

 

and other practical accessories, thus changing the current situation where there are no national standards and reference materials for "expansion joint devices" in China, marking a historic new chapter for expansion joint devices in our country.In 2014, based on the "Expansion Joint Construction Atlas" edited by Lianheqiang Company,

 

a unified national standard will be formulated, indicating that the expansion joint industry will usher in greater glory!The reference drawings for the expansion joint industry edited by Lianheqiang Company were adopted as national standards and officially issued in 2015.

 

                                         Technical information related to Lianheqiang expansion joint products

 

 

1. Product Introduction

 

Expansion joint devices are widely used in various types of industrial and civil buildings, effectively adapting to deformations and displacements caused by external factors such as earthquakes, temperature changes, and strong vibrations.

 

They are component devices that alleviate the cracking and damage caused by these factors, playing an important role in improving the durability, safety, and aesthetics of buildings.

 

2. Scope of Application

Products	Main Materials	Applicable Scope
Floor and ground expansion joint devices	Aluminum alloy base, aluminum alloy cover plate	Pedestrian passage floor joints
Load-bearing floor expansion joint devices	Aluminum alloy base, stainless steel cover plate	Garage and passage joints
Exterior wall expansion joint devices	Aluminum alloy base, aluminum alloy cover plate	Exterior wall joints
Interior wall expansion joint devices	Aluminum alloy base, aluminum alloy cover plate	Interior wall joints
Ceiling expansion joint devices	Aluminum alloy base, aluminum alloy cover plate	Ceiling joints
Roof expansion joints	Aluminum alloy base, aluminum alloy cover plate	Roof joints
Parking roof expansion joint devices	Aluminum alloy base, stainless steel cover plate	Parking roof joints

 

3. Performance Characteristics

The "seamless connection" style of the expansion joint significantly corrects the height difference between the cover plate and the base, reducing the amplitude of vibrations during daily use. Compared to other ordinary cover plate styles, it is more aesthetically pleasing and practical. The expansion joint device incorporates a thermally melt-weldable, highly elastic rubber component - thermoplastic vulcanizate (TPV), which, when combined, provides greater expansion capabilities and allows for seamless connections and welded corners, playing a key role in water stopping; specially formulated rubber can also achieve fire resistance.

    

                                                                                       TPV/Thermoplastic Vulcanizate Rubber Strip Products

      

                   Floor expansion joints Floor and ground corner type expansion joints Wall expansion joints Floor and ground seismic type expansion joints

      

                   Wall expansion joints Expansion joint accordion rubber Expansion joint accordion rubber Expansion joint accordion rubber

      

                   Wall expansion joints Wall expansion joints Wall expansion joints Wall expansion joints Wall expansion joints

    

                                 Bridge expansion joints Floor expansion joints Floor expansion joints

    

                           Floor expansion joints Floor expansion joints Floor and ground corner type expansion joints & wall corner type expansion joints

The expansion joint device is widely used in various types of public buildings and structures. It can effectively respond to deformations and displacements caused by external factors such as temperature and humidity. It is a necessary component to prevent buildings from cracking, damaging, or even collapsing, and can significantly enhance the practicality, durability, and safety of buildings.