What is the nest?
Slee is a steel skeleton based on multiple columns. These columns are connected to the foundation by the column plate and prevent vibration in the structure. The other part of the columns are connected to the frame or frame with flanges. Behavior also makes it easy to install and execute the sloping roof.
Most sports halls, warehouses, livestock and poultry halls, etc. are made of nest. Based on the size of the crater, height, length and amount of rain and snow are designed and implemented in various forms. The nest is derived from the English word Industrial SHED and is called triangular structure.
In Iran, niche was used about 75 years ago to build various industrial plants and workshops. Iranian engineers designed and executed a similar structure to European niches to build niches in Iran. In today's world, more than thousands of niches have been built in different industrial settlements and industries.
What are the types of niches?
As mentioned, niches are metal structures with a sloping ceiling that are manufactured in different types and are used according to the type of use and location. Each of these niches has features that the buyer or customer can order according to the type of project and its taste.
Truss nest
One of the simplest and most up -to -date niches is truss nest. The unique parameters in its construction make it distinct from other types of niches. In terms of materials used in manufacturing, it is similar to beam nest, but it is different in accurate technical calculations.
The use of up -to -date engineering expertise in the construction of truss nest has made the use of steel components in its lowest value, resulting in the amount of steel. The weight of the structure decreases and increases its durability and durability. Failure to use too much steel components in the truss niches does not undermine its safety and security at all.
In this structure, all the lateral forces such as wind, earthquake, etc. are distributed uniformly in all parts, and this will prevent weight from being accumulated at one point.
The benefits of making truss nest can be low -cost costs, design of arc or octagonal roof, ease of installation by crane in any number, final price less, no restriction on wide openings and no open openings The column, the lack of design, and the ability to open the structure, made it easy to point out. In making this type of nest, the crater can be created in the desired size and size to suit the customer's taste.
The beam nest
The oldest and most widely used niches over time are beams. Keep in mind, however, that in the past because of the lack of sufficient engineering knowledge, these types of niches were more common.
Due to the teaching of the construction of the beam in the past, all college graduates used this method of construction. That is why the number of beams in the country is higher than other types. The construction of these types of niches is obsolete in European countries but is still used in Asian countries such as Iraq, Afghanistan, Iran, etc.
Making beam nest is done using steel and black sheets. The roof shape of this type of nest is a octagonal form that is caused by a weld.
It is not possible to build a span of more than 45 meters long. The weight of this nest is higher than usual because of the use of large parts and is more costly than other structures. According to the explanations, people prefer to replace another nest structure.
It is recommended that niches with a span below 18 meters through the beam due to less cost parts. There are fewer to build, use a beam nest for this size.
UBM niches (UBM)
In the manufacture of this type of niches, galvanized sheets are formated and rolled. The sheets are connected to each other by a special device called Samir. This is done to fasten the sheets together. But the point in this section is the possibility of removing the sheets from each other due to contraction, expansion and severe vibrations caused by wind force. The most common use of this type of nest for structures is up to 30 meters.
Low resistance to air, rain and snow due to the use of spray insulation, causing the component to be used shortly after the components. Need to be repaired and this will increase consumption costs.
Insulation used in these types of niches is flammable and absorb contamination. In addition, they will have no disinfection capability, so this type of nest should be used in hospitals, food, poultry or animal husbandry. It is to other niches, but due to the longitudinal limit and lack of resistance to moisture and climate change, it is recommended to use other types of niches.