Steel Structure Introduction
Steel structure is the materials used in various steel constructions and it has specific shape. Based on the project's unique specifications, the steel components can assume various shapes, dimensions, and thicknesses, produced through hot or cold rolling processes. In contrast, others are created by welding flat or curved plates together.
Steel structures typically feature shapes such as H profile, I-beams, hollow structural sections (HSS), channels, angles, and plates.
The main type of steel structure are the frame structure, the truss structure, the grid structure, the arch structure, and the portal rigid steel frame.
| Specification |
| Main steel frame | Column: Q355 Welded H Section Steel (equivalent to S355JR, ASTM A572 Gr. 50) |
| Beam: Q355 Welded H Section Steel (equivalent to S355JR, ASTM A572 Gr. 50) |
| Secondary Frame | Purlin: Q235 C and Z purlin (equivalent to S235JR, ASTM A36) |
| Knee brace: Q235 Angle Steel (equivalent to S235JR, ASTM A36) |
| Tie Rod: Q235 Circular Steel Pipe (equivalent to S235JR, ASTM A36) |
| Brace: Q235 Round Bar (equivalent to S235JR, ASTM A36) |
| Maintenance system | Roof Panel: EPS Sandwich Panel/ Glass Fiber Sandwich Panel/ Rock Wool Sandwich Panel |
| Wall Panel: Sandwich Panel/ Corrugated Steel Sheet |
| Accessories | Window: Aluminium Alloy Window/ PVC Window/ Sandwich Panel Window |
| Door: Sliding Sandwich Panel Door/ Rolling Metal Door/ Personal Door |
| Structure Usage | Up to 50 years |
| Finishing Options | Vast array of colors and textures available |
The frame load-bearing structure is a load-bearing system composed of a horizontal frame and a longitudinal connecting member, and the wall only serves as an enclosure. It is suitable for large spans, high plants, and large crane loads. The load-bearing framework is made of steel plate or hot-rolled steel through cutting and welding.
The horizontal framework of the factory building includes roof beams (or roof truss), columns, and foundations. It bears the loads from skylights, roofs, walls, and other parts, as well as its weight, various loads generated by cranes, and longitudinal wall wind loads. These loads are transmitted to the foundation through the transverse framework through the columns.
The longitudinal connecting components are connected by the roof purlins, wall beams, tie rods, supports, etc. to the horizontal frame to form a single-story industrial building space system. They are mainly to ensure the stability of the transverse framework, bear the tension load, and transmit it to the foundation through the column.
Steel Structure Widely Application
There are two main types of steel plate: Q235 and Q355.
Q means "bend", it is for the yield strength.
Q235 is the minimum yield strength 235 Mpa.
Q355 is the minimum yield strength 355 Mpa.
Q235 and Q345 as the popular construction steel materials
They are divided into 4 grades, ABCD. Such as Q235A , Q235B, Q235C, Q235D.
ABCD refers to the impact test grade. A means that it has not been impact tested. B means that it has been impact tested at 20 ° C temperature. C means that it has been impact tested at 0 ° C temperature. And D means that it has been impact tested at low temperature of -20 ° C.
Q235A&Q235B, Q345A&Q345B are the most popular.
Q345 is mainly used for main steel frame. Like column, beam, wind speed resistant column, crane girder...
Q235 is mainly used for secondary steel frame. Like tie bar, brace, vertical/horizontal support...
The choice of material can be according to the design of the structure of your specific circumstances. For example, if the structure is intensity control structure, Q345 can be considered. If the structure is stiffness control structure, you can choose Q235. The price Q345 is a little higher, but because of its high strength, the material can be saved. And the price difference is not great.
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