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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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Cooling method of steel building structure

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 Steel structure plant mainly refers to the main load-bearing components are composed of steel. Including steel columns, steel beams, steel structure foundation, steel roof truss (of course, the span of the factory is relatively large, basically now are steel structure roof truss), steel roof, pay attention to the wall of steel structure can also be maintained by brick wall. Due to the increase of China's steel production, many have begun to use steel structure plants, which can also be divided into light and heavy steel structure plants. Industrial and civil construction facilities made of steel are called steel structures.

1. Heat preservation and cooling:

Steel structure plant insulation film can isolate most of the solar radiation and conduction heat, reduce the indoor greenhouse effect. Then the temperature of the plant is greatly reduced to improve the environment of the steel structure plant.

The commonly used methods now have the following two choices: the steel structure roof of the plant is covered with thermal insulation cotton, the general thermal insulation cotton used on the roof is glass wool, the common thickness is 50mm,75mm,100mm, and the density is 10kg/m. Good equipment can generally reduce the indoor temperature by 5-8 ° C, and the construction process is messy. It is necessary to remove the original roof, pull the steel wire mesh, lay glass wool on the steel wire mesh, cover the original roof plate on the steel structure, and then do water insulation treatment. Thermal insulation reflective coating sprayed on roofing panels.


2. Let in air to cool down

Because some machines in the steel structure plant have heat and water vapor, these hot gases and water vapor assuming that they are not discharged in time will accumulate in the plant, and then the temperature of the steel structure plant will increase and affect the steel structure plant environment. The way to deal with these problems is to ensure the fair ventilation of the plant and the appropriate ventilation system of the equipment. The exhaust system equipment will obviously improve the air environment of the steel structure plant and greatly reduce the temperature of the steel structure plant.

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