A steel structure is made up of hundreds or thousands of individual components. The deciding factor in the cohesion and synchronous operation of the entire system is the steel structure connectionA structure can only be solid when its connections are strong enough and properly executed.
Currently, there are 3 most common types of connections: welded connections, bolted connections and riveted connections, of which welded connections and bolted connections are the most widely used. This article will analyze each type of connection in detail, helping you understand their advantages, disadvantages and scope of application.
1. Welded Connections
Welding is a method of using heat to locally melt metals at the contact point, causing them to fuse together and form a permanent joint after cooling.
- Advantage: Saving materials (no need for additional details such as brackets, bolts); creating monolithic structures with high aesthetics; tight and durable connections.
- Disadvantages: The heating process can cause deformation and warping of components; the quality of the weld depends largely on the worker's skill; it is difficult to check the quality with the naked eye, requiring specialized equipment.
- Common types of weld joints:
- Korea vs. China: Direct connection of two components lying on the same plane.
- Corner welding: Connecting two structural members placed perpendicular or inclined to each other, very common in beam-column connections.
- Korean husband: Join two overlapping steel plates.
2. Bolted Connections
This is a method of using bolts and nuts to tighten steel components together through pre-drilled holes.
- Advantage: Construction and installation at the construction site is very quick; easy to disassemble, convenient for repair, maintenance or relocation of the project; quality is easy to check; does not require highly skilled workers.
- Disadvantages: More material is required for bolts and gussets; drilling weakens the cross-section of the member.
- Commonly used bolts:
- Regular bolts: Made from low carbon steel, used in connections that do not require too much force.
- High strength bolts: Made from alloy steel, heat treated, has the ability to withstand very large forces, creating large frictional force between the steel plates.
3. Quick comparison: When to use Welding Joints, when to use Bolts?
In practice, these two methods are often combined: welding is preferred during the manufacturing and processing of components at the factory, while bolted connections are used mainly for the assembly of components at the construction site.
| Criteria | Korean Link | Bolt Connection |
| Place of implementation | Mainly at the factory (easy to control) | Mainly at construction sites |
| Construction speed | Slower at the construction site | Very fast at the construction site |
| Technical requirements | Requires highly skilled workers | No high skills required |
| CHeck quality | Difficult, requires specialized equipment | Easy, check with eyes and torque wrench |
| Detachability | Hard (permanent link) | Easily |
| Economic | Saving steel materials | Costs more materials but saves time and installation labor |
4. Vietnamese Standards (TCVN) applied to steel joints
The design and calculation of connections in steel structures in Vietnam must strictly comply with the regulations in TCVN 5575:2012 – Steel structures – Design standardsThis standard specifies in detail how to calculate the load-bearing capacity of various types of welds and bolts, ensuring that connections are designed safely and effectively.
Choosing and designing the right type of linkaget is a vital factor for the quality of a steel structure project. At Hai Long Construction, we apply the latest design standards and modern technology to ensure that every connection in the project is of the highest quality and safety.
WHY SHOULD YOU CHOOSE HAI LONG CONSTRUCTION AS A STEEL STRUCTURE PRODUCTION AND INSTALLATION UNIT?
With more than 25 years of experience in the field of manufacturing & erecting steel structures, Hai Long Construction is proud to be Leading reputable unit, providing customers with complete construction solutions, meeting all needs and requirements.
- Team experienced engineers, architects and experts, knowledgeable about the design and construction of warehouse factories according to international standards.
- Diverse construction capacity, meeting all project sizes and requirements, from simple to complex factories.
- Possessing a system of modern machinery and equipment, with a capacity of nearly 50.000 tons/year, ensuring fast, accurate and safe construction.
- Professional construction process, is strictly managed.
You are looking for one Prestigious and professional steel structure manufacturing and erection unit? Please contact Hai Long Construction for free consultation and quote:
- HAI LONG CONSTRUCTION JOINT STOCK COMPANY – MEMBER OF TAIYO GROUP
- Address: Taiyo Building, 97 Bach Dang, Hong Bang Ward, Hai Phong City, Vietnam.
- Hotline: 084 6625 888
- Email: info@hailongjsc.vn
