Most of the steel structure factory commonly uses two kinds of manufacturing ways of the H-shape steel - hot rolled and welded, this is cause the cold rolled steel require higher cost and precisions. Comparing with it , the hot rolled and welded H shape steel column and beam are widely used for the steel structure buildings.

The difference between them can be described in three aspects: manufacturing ways, application range, the standard,and others.

Manufacturing Ways

Hot rolled execution is manufactured by the steel raw material supplier through one shoot like “shaped steel”, the factory only need to carry out the prefabrication work afterwards.

The raw material of the welded H shape is the steel sheet , which the producer need to carry out the cutting and welding process in advance, then prefabricate in next step.

It is easily to define it by vision: no welding lines on Hot Rolled H shape.

Application Ranges

Hot Rolled H shape steel structure is mostly used in the projects with clear small span less than 25meters. Especially the projects in European or French speaking countries that they have the limited space and specific construction regulation request.

Flexible welded H shape is used for the big project like industry workshop, big plant,etc. These projects need more spaces for the big machinery and loading trucks,the span generally is more than 30 meters with 8 meters height or even more. 

Standard

Hot Rolled type has the different standard for different regions. GB is the Chinese Standard, and IPE,HEA as the European Standard, ASTM standard for United states. These standard is the most common and used, they have a little bit difference about the specification, tension and combination of the elements.

Comparing with the Welded H shape steel structure, Hot rolled is smaller scale with less weight and rectangular shape, which can load more volumes in the container.

It will need variable cross-section, in order to security the safety and stability of whole steel structure buildings for some big projects, which only can be realized by the flexible Welded H type.

Because there is different specification of shape steel in other countries, IPE&HEA&ASTM need to be imported from the other countries, which is more expensive than GB standard under the same quality, increasing the construction cost, and according to our comparision, different standard have not obvious distinction in the application of the building, besides of higher requirement of one specifications.

Normally, Dorian recommended the economic GB standard solution, then choose the suitable manufacturing ways according to the local environment and the building size as well as the customer’ demand.

Other Aspects

The hot rolled generally have better quality and longer service time ;the welded H-shape have more varieties and can choose the size of the section based on the actual requirements, and the hot rolled have less model and easy to waste of the material; through the hot rolled process ,we can gain the H-type steel with higher quality and less energy consumption and material. 

To sum up ,due to the limitation of the current technology ,the welded H shape steel is more and more wide application by the manufacturer with higher efficiency, lower consumption and cost. But ,with the development of the technology, the hot rolled will certainly replace the welded , and is widely used by the construction industry. Finally, If you have any questions about the steel structure ,please tell us.

Compared to concrete buildings , steel structure buildings are green & low carbon, energy-saving and environmentally friendly, which will significantly reduce solid waste, water consumption and carbon dioxide emissions. When steel structure buildings are disassembled, the steel material can be recycled and produced higher residual value than the other buildings.

In the context of the world economy’ pursuit of sustainable development,and the continuous development and innovation of the manufacturing technology of steel, steel structures building have undoubtedly become a better choice for various types of buildings. Steel structures are widely used in industrial workshop, various types of warehouse, poultry house and supermarkets and so on ,which are composed of steel structure frame, roof&wall system and connecting system.

• Steel Structure Frame

The steel structure frame includes main frame and secondary frame. In general, the main frame includes steel column and steel beam, and secondary frame consists of roof&wall bracing, tie bar, roof&wall purlin, brace, bracing tube and angle brace.

The steel column is the main load-bearing and anti-lateral force part of the steel frame. The steel beam needs to bear the load of roof in total steel frame, and transmits that to steel column and  foundation in turn. At the same time, the steel beam can coordinate the internal force of the steel column and bear the vertical and horizontal loads together with the steel column. Lastly, the foundation supports the steel column and bears the upper load of the steel structure.

In order to realize the stability and safety of whole steel structure building, the engineer need to design secondary frame composed of the different component for different sizes of building.

• Roof&Wall System

The roof&wall panel are an important part of roof&wall system, which generally choose the single layer steel sheet, EPS sandwich panel and rock wool sandwich panel according to the buyer’ need and local conditions., Single layer steel sheet is enough for regular steel structure building. Compared to other sandwich panel, the EPS sandwich panel have better water-proof performance and rock wool sandwich panel have better fire-proof effect, but,the price of the sandwich panel is higher than single layer steel sheet. So the type of roof&wall panel depends on the buyer’ requirement.

Except for roof&wall panel, the roof&wall system also includes the ventilation system and the daylighting panel, window and door , which are customized by clients.

If clients don’t have special requirements for roof&wall system, engineer will design based on regular function. The completed drawings will be sent to the client for final confirmation prior to quotation.

• Connecting system

Connecting system is usually put in last section of quotation and it contains common bolt, high-strength bolt, anchor bolt and basket bolt. The steel structure frame and roof&wall system are connected by these different bolts. For example, the steel column will be installed on foundation by M24 anchor bolt, and the roof panel is installed on roof purlin by M12 common bolt.

For a steel structure project, foundation work must be done firstly. Usually, the layout drawing of foundation will be provided to the buyer after the deal is confirmed. Workers need to erect steel structure frame and roof&wall system using various bolts according to installation drawing during the installation.

The factory processes and manufactures steel structural parts, and workers can directly fasten different types of bolts on site for construction and assembly. Therefore, this makes that the steel structure building has faster installation speed and shorter construction period.

Steel has high strength and structural bearing capacity, which is why steel buildings are strong and durable. At the same time, the steel structure can realize the free combination of different spans, so the internal space of the building can be arranged flexibly and maximized.

Dorian sales&engineers team always provides ideal drawing as clients’ requirements and offer the competitive price in the steel market. Please share the steel structure project info and let us put forward the full-set solution to your project.