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What is a shear key in steel structures?

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 In steel structure engineering , the column base connection serves as the pivotal interface linking the superstructure to the concrete foundation below. It must safely and reliably transmit various loads from the upper structure: vertical pressure , uplift forces , bending moments , and horizontal shear forces . When horizontal shear forces become substantial, the friction alone between the column base plate and the concrete foundation surface proves insufficient to resist them. At this juncture, a critical small component becomes indispensable—the shear key . Shear keys, as the name suggests, are structural steel connection components specifically designed to resist and transmit horizontal shear forces. Essentially, they are short steel members. Installation location: Typically welded or anchored to the base plate of a steel column (or other load-bearing components such as equipment supports ), with its lower end embedded in the concrete foundation or concrete structure cast ...
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New Options for Optimising Building Transport and Installation

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As an important part of modern steel structure buildings, steel mesh frame, with its unique lightweight and high strength characteristics, shows significant advantages in the field of building construction. Among them, easy transport is one of the most important features of steel mesh frame, behind which lies a significant improvement in building installation efficiency.

In traditional building construction, large steel structure buildings often face transport problems. The bulky section steel structure not only has high transport cost, but also has very high requirements on the space and load capacity of the transport tool, which can easily lead to loss and waste of time in the transport process. The emergence of steel mesh frame has completely changed this situation. By breaking down the building structure into modular design, the steel mesh frame achieves a great reduction of structural weight, and the transport process becomes extremely easy. For example, in the construction of a mega stadium, the project team successfully reduced the transport weight of the whole building to one-third of the original design by adopting the steel mesh frame system, so that the frequency of transport vehicles is greatly reduced, and the cost and time of transport are also significantly optimised.


During the transport process, the modular design of the steel mesh frame makes the lifting operation more efficient. The standardised mesh units can be dismantled and assembled quickly, reducing the time and cost of secondary processing during on-site construction. Especially in overseas construction projects, the standardised transportation and modular installation of steel mesh frame can greatly shorten the construction period and control the construction cost. In addition, the lightweight feature of steel mesh frame reduces the energy consumption during transportation, which further enhances the environmental protection benefit.

On the construction site, the installation efficiency of the steel mesh frame has also been significantly improved. Due to its modular design, on-site workers can quickly assemble each unit, significantly shortening the installation cycle. Especially in some high-rise building projects, the rapid installation of steel mesh frame not only ensures the safety of the building, but also provides sufficient space for the subsequent interior decoration, which guarantees the quality and progress of the overall project.

With the continuous improvement of steel structure mesh frame technology, whether it is the transport efficiency or installation speed, steel structure mesh frame is constantly revolutionising the face of modern building construction. In the future, with the integration of 5G, artificial intelligence and other new technologies, the transport and installation efficiency of steel structure mesh frame will be further improved, bringing broader development space for the construction industry.

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What is the difference between a single-layer reticulated shell and a double-layerreticulated shell?

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