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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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What is PC resistant board? Why do sunroom canopies use it?

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First, what is PC board?

Many people have a misunderstanding of PC board, that PC board is acrylic board, is a piece of ordinary plastic board, easy to yellow and become brittle. In fact, PC board and acrylic board is not the same at all! Acrylic sheet is made of methyl methacrylate monomer MMA polymerisation, PC sheet is a high-performance engineering plastics polycarbonate processed. In addition to the two translucency look about the same, the performance of raw materials are not the same, we do not want to get confused.

PC board


Second, what are the characteristics of PC sheet?

PC Sheet is a material with excellent light transmission properties, its 6MM thickness of the transmittance of up to 82%, similar to glass, it is difficult to distinguish. In addition, the material also has excellent impact resistance, compared with the same thickness of ordinary glass, plexiglass and toughened glass, its impact resistance is 300 times, 30 times and 20 times higher respectively. Even when a 3kg hammer is dropped from a height of 2 metres, the material remains undamaged. As a result, sunrooms and canopies made of PC panels can effectively withstand damage from hail, snow pressure, and overhead smashers.

In addition, the heat transfer coefficient of PC sheet is 1.1-4.1W/m2℃, which is lower than the heat transfer coefficient (K value) of ordinary glass and other plastics, and its heat insulation effect is 7%-25% higher than that of the equivalent glass, and its heat insulation performance can be up to 49%. In the outdoor application of sunroom and canopy, even in the sun exposure, the material will not turn yellow and decay, ten years after the loss of light transmission rate of only 6%.

Third, the PC endurance plate application cases 

With the development of materials, PC endurance plate in the field of construction is very widely used in the domestic field, can be used for patio awnings, courtyard sunroom, terrace sunroom, etc., can also be used in the field of outdoor canopies such as stations, airports, etc., can effectively prevent ultraviolet rays, so can be used for a long time in the outdoors.

 

The application of PC endurance board in various fields is very wide, with good performance and use effect. In the future, the application fields of PC resistance plate will continue to expand and deepen.


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Explore the endless possibilities at https://www.safsteelstructure.com/

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What is a coal bunker?

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Suspension structures

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 A suspension structure is a structural form that carries roof loads through a series of high-strength steel cables. Its main load-bearing member is the cables, which are usually steel cables made of high-strength steel wires. The roof of the suspension structure is generally light and thin, and its shape can be very flexible, able to realize the large span across. For example, in the roofs of some large conference centers or exhibition halls, the suspension structure can create unique shapes such as double-curved paraboloid or single-curved paraboloid, which make the building have a strong artistic influence. Suspension structures require a stable support structure to anchor the steel cables, usually using reinforced concrete columns or steel columns as support. And in order to ensure the stability of the structure, it is also necessary to set a certain amount of prestressing, so that the steel cables are in a tensioned state before they are subjected to loads. Scope of applicatio...
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What is the difference between a single-layer reticulated shell and a double-layerreticulated shell?

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  The differences between single-layer reticulated shells and double-layer reticulated shells are as follows: Structural Configuration   Single-layer reticulated shell: Composed of a single layer of members, with the members directly connected to form a grid structure . The node configuration is relatively simple, typically employing rigid connections that allow the members to bear not only axial forces but also bending moments and shear forces.   Double-layer reticulated shell: Consists of upper and lower parallel layers of members connected by web members, forming a truss-like structural system. The nodes are generally hinged, and the members primarily bear axial forces. Its configuration is relatively complex, requiring more members and nodes to ensure structural stability and load-bearing capacity. Structure Single-layer mesh shell: composed of one layer of rods, the rods are directly connected to form a mesh structure, the node structure is relatively simple, usually...
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