Qian Cheng Metal Products Co., Ltd. is a professional manufacturer specializing in the research, development, and production of various steel products, plates, construction materials, metal products, thermal insulation materials, expansion joints, and contraction joints. The company's main business includes:

Expansion joints, shrinkage joints, roof expansion joints, exterior wall expansion joints, floor expansion joints, heavy-duty expansion joints, floor shrinkage joints, interior wall expansion joints, building shrinkage joints, expansion joints and stainless steel expansion joints, aluminum alloy expansion joints, expansion joint covers, shrinkage joint covers, finished expansion joints, settlement joints, exterior walls, roof settlement joints, interior walls, ceiling settlement joints, floor settlement joints, stainless steel settlement joints;

Our company is located in Jinan, Shandong. Tailoring to the diverse technical needs of our clients, we continuously innovate and develop to meet the actual demands of a broad user base, producing a variety of specifications and models to cater to our extensive clientele.

Our products are widely used in various buildings, including KFC outlets, car dealerships, office buildings, institutional buildings, commercial structures, and high-standard factory facilities.

Our company, with an attitude of integrity, sincerely welcomes all design institutes and engineering design units of all sizes across the nation to choose our products. We kindly request experts, leaders at all levels, and industry主管部门 to come for guidance, and together contribute to the development of China's construction industry!

Expansion joints are divided into three types: expansion joints, settlement joints, and seismic joints.

Expansion joints: Due to changes in temperature and humidity, building components may undergo expansion and contraction deformation. To address this, vertical gaps are typically set at appropriate locations in the structure, separating the walls, floor slabs, and roofs from the foundation upwards, creating several independent sections of the building. For gaps set to overcome excessive temperature differences, the foundation may not be cut, but the structure is broken along from the top of the foundation to the roof.

Seismic joint: A gap set to make buildings more regular and enhance structural seismic resistance, with the foundation remaining unbroken. Its purpose is to divide large buildings into smaller sections, creating relatively independent seismic units, to avoid overall uncoordinated vibrations of the building due to earthquakes and subsequent damage.

In seismic-resistant zones, settlement joints and expansion joints must meet the seismic joint requirements.

Settlement Joint: A structural joint designed in buildings where there is a significant difference in elevation, uneven distribution of upper loads, or construction on different subsoil foundations, to prevent cracking in walls or other structural parts due to uneven settlement. The settlement joint divides the building into several sections, forming an independent system with no connection between the foundation, walls, floors, and roof. The joint width is typically 70-100 millimeters. A vertical seam that completely separates the building or structure from the foundation to the top, used to avoid cracks caused by uneven下沉 in different sections. Usually located between parts of the building with significant differences in height, load, or foundation bearing capacity, as well as at the junction of new and old buildings.