In the context of the modern construction industry constantly developing, choosing the right structural system is a decisive factor for the success, safety and economic efficiency of a project. Among countless solutions, steel structures emerge as a top choice thanks to their outstanding advantages in terms of load-bearing capacity, flexibility and construction speed. However, the world of steel structures is extremely diverse, each type is born to solve separate technical and architectural problems.
So, what are the most common types of steel structures? When should you use frame structures for high-rise buildings, when are truss structures optimal for large-span factory roofs, and why are arch structures ideal for sports halls?
This article will provide a comprehensive and in-depth look, analyzing in detail the 5 most popular types of steel structures today: Frame, Truss, Arch, Space and Cable. Not only stopping at the definition, we will dissect the structure, working principle, advantages and disadvantages and practical applications of each type. In particular, an intuitive comparison matrix will help you easily make a decision to choose the most optimal solution for your project.
1. What is Steel Structure?
Steel structure is a load-bearing system of a building formed by connecting steel components together. Instead of using traditional reinforced concrete, all or most of the main load-bearing frame of the building (columns, beams, floors, roofs) are made of steel. Thanks to its high strength, steel structures are very sturdy and require less material than other types of structures such as concrete or wood.
In modern construction, steel structures are applied to most types of works, from heavy industrial factories, high-rise buildings, traffic infrastructure, bridges, towers, airports, to civil works.
2. Detailed Analysis of 5 Common Types of Steel Structures
Each type of steel structure has a specific working principle and application range. Understanding the nature of each type will help engineers and investors optimize both technical and cost.
2.1. Frame Structures
This is the most popular and widely used type of steel structure, especially in high-rise buildings and civil housing.
Structure and Working Principle: A frame structure consists of vertical members such as steel columns and horizontal members such as steel beams. These beams and columns are rigidly connected to each other at the joints, forming a space frame system capable of withstanding both vertical loads (self-weight, live loads) and horizontal loads (wind, earthquakes). The load from the floor will be transferred to the beam, then the beam will be transferred to the column and finally the column will be transferred to the foundation system.
Advantage:
- High load bearing capacity: Very effective in resisting complex loads.
- Space optimization: Allows the creation of open, flexible spaces within the building.
- Fast construction: Components are prefabricated at the factory and quickly assembled at the construction site.
- High flexibility: Easy to modify, upgrade or expand in the future.
Disadvantages:
- Limited span capacity: Compared to other structural systems, pure frame structures are not optimal for structures that require extremely large spans without central columns.
- Poor fire resistance: Steel will soften and lose its strength at temperatures of 500-600°C, requiring expensive fireproofing solutions.
Typical applications:
- High-rise buildings, office buildings, apartments.
- Shopping mall, showroom, supermarket.
- Residential houses, steel frame townhouses.
- Small and medium sized industrial factories and warehouses.
2.2. Truss Structures
Truss structure is the optimal solution for projects that need to overcome large spans, especially in roof structures.
Structure and Working Principle: Truss structure uses a series of straight steel bars (usually angle steel, steel pipes) linked together to form stable triangles. The basic principle of truss is to convert bending forces (moments) acting on the whole system into longitudinal forces (tension or compression) in each individual bar. Because steel is very good at tension and compression, this solution is extremely efficient in terms of materials.
Advantage:
- Large span capacity: The most economical solution for factory roofs, stadiums, exhibition halls that require large spaces without columns in between.
- Light weight: Compared with solid beams with the same load-bearing capacity, trusses are significantly lighter, helping to reduce the load on columns and foundations.
- Material saving: Make the most of the working capacity of steel materials.
- Flexibility: Can create many complex roof shapes.
Disadvantages:
- High fabrication cost: Requires a lot of fabrication and welding of truss nodes.
- Large structural height: Truss systems usually take up more vertical space than solid beams.
- Maintenance requirements: The truss bars are thin and have many contact surfaces, so they are susceptible to corrosion and need to be carefully protected with paint.
Typical applications:
- Roofs of industrial factories and warehouses.
- Roof of gymnasium, stadium, exhibition center.
- Road bridges, railway bridges.
- Types of communication towers, power transmission towers.
2.3. Arch Structures
The arched structure offers high aesthetics and unique load-bearing capacity, often chosen for iconic architectural works.
Structure and Working Principle: The arch structure has a characteristic curved shape. Under the effect of vertical load, the arch mainly bears the compressive force along its axis, with a very small bending moment. This compressive force is transmitted to the two arch legs and creates a large horizontal thrust. Therefore, the foundation of the arch structure must be specially designed to withstand this thrust.
Advantage:
- High aesthetics: Create unique and impressive architectural spaces.
- Material saving: Because it is mainly subjected to compression and has a small bending moment, the arch structure is very efficient in terms of material use.
- Good span capacity: Can be used for medium to large span structures.
Disadvantages:
- Large horizontal thrust: Requires complex and expensive foundation systems to neutralize horizontal thrust.
- Complex construction: The fabrication and erection of curved components requires high precision.
Typical applications:
- Gymnasium, stadium, swimming pool.
- Cultural palace, theater, exhibition center.
- Terminal, hangar.
- Steel arch bridge.
2.4. Space Frame Structures
This is a developed form of truss structure, working in three dimensions, providing superior load-bearing and covering capacity for very large-scale projects.
Structure and Working Principle: The space structure is formed by welding or bolting steel bars (usually steel pipes) and bridge nodes into a three-dimensional grid system. This structural system works simultaneously in many directions, effectively dispersing the load throughout the entire system, giving it very high stiffness and stability.
Advantage:
- Extremely large span: The leading solution for projects requiring super-large spaces such as airports and train stations.
- High overall stiffness: Very good resistance to deformation and vibration.
- Lightweight: Despite its large size, its self-weight per square meter is relatively light.
- Diverse architecture: Can create complex, freeform shapes.
Disadvantages:
- Complex design and calculations: Require specialized software and highly skilled engineers.
- High manufacturing and assembly costs: The number of bars and nodes is very large, requiring absolute precision in production and assembly.
Typical applications:
- Airport canopy, train station.
- Sports arena, national convention center.
- Covering large squares and public spaces.
2.5. Cable Structures
Cable structures are the most efficient type of load-bearing structures, taking advantage of the superior tensile properties of steel materials.
Structure and Working Principle: This structural system uses high-strength steel cables as the main load-bearing members. Cables can only bear tensile force, so the entire load acting on the structure will be converted into tensile force in the cables. These cables are anchored to compressive members such as towers, columns or directly anchored to the ground and large concrete blocks to ensure stability.
Advantage:
- Longest span: The only solution for bridges with spans of several kilometers.
- Most efficient use of materials: Make the most of the tensile strength of steel.
- Slender, light architecture: Creating iconic and aesthetically pleasing structures.
Disadvantages:
- Low stiffness: Susceptible to deformation and vibration under dynamic loads such as wind, requiring complex stiffening solutions.
- Huge anchorage and foundation requirements: Massive foundation systems are needed to withstand the enormous pulling forces from the cables.
- Special construction techniques: Require specialized construction technology and equipment, very complicated.
Typical applications:
- Suspension bridge, cable-stayed bridge.
- Suspended canopy for stadiums and gymnasiums.
- The structures are stabilized by mooring lines.
3. Visual Comparison of Types of Steel Structures
To make the right choice, it is essential to directly compare the important characteristics of each type of structure. Below is a summary and comparison of 5 types of steel structures based on the main criteria.
Frame Structure
- Main advantages: Good multi-directional load bearing, fast construction, flexible space.
- Disadvantages / Technical requirements: Limited span, fire protection measures required.
- Optimal span capacity: Small to Medium (under 30m)
- Relative cost: Average
- Most suitable applications: High-rise buildings, industrial buildings, commercial centers, residential houses.
Truss Structure
- Main advantages: Large span, light weight, material saving.
- Disadvantages / Technical requirements: Large structural height, high cost of manufacturing truss nodes.
- Optimal span capacity: Large (30m – 100m)
- Relative cost: Medium – High
- Most suitable applications: Factory roofs, warehouses, gymnasiums, road bridges.
Arch Structure
- Main advantages: High aesthetics, material saving due to mainly compression.
- Disadvantages / Technical requirements: Creates large horizontal thrust at the foundation, complicated construction.
- Optimal span capacity: Medium to Large (20m – 80m)
- Relative cost: Medium – High
- Best suited applications: Gymnasiums, cultural palaces, swimming pools, train stations.
Spatial Structure
- Main advantages: Extremely large span, very high overall stiffness, architectural freedom.
- Disadvantages / Technical requirements: Design and construction are very complicated, manufacturing costs are high.
- Optimal span capacity: Very large (over 80m)
- Relative cost: High
- Most suitable application: Airport roof, train station, national convention center.
Cable Structure
- Main advantages: Longest span, most efficient use of materials, slim architecture.
- Disadvantages / Technical requirements: Low stiffness, easy to vibrate, requires extremely large anchor and foundation systems.
- Optimal span capacity: Extremely large (hundreds to thousands of meters)
- Relative cost: Very high
- Best suited applications: Suspension bridges, cable-stayed bridges, suspended stadium roofs.
4. Additional Factors to Consider When Choosing
In addition to choosing the type of structure, the steel material also plays an important role.
4.1. Common Types of Steel Profile Materials
Structural steel is manufactured in a variety of cross-sectional shapes, each suited to a particular load-bearing function.
H and I-shaped steel: Often used as main columns and beams in frame structures thanks to their good load-bearing capacity. I-shaped steel is often preferred for vertical load-bearing structures.
U, C shaped steel: Popular for secondary beams, roof purlins, and lightweight structures due to their light weight and reasonable cost.
V-shaped steel (Angle steel): Is a basic component to create truss and tower structures.
Steel pipes (round, square, rectangular): Often used as columns, trusses, and components in spatial structures thanks to their good compressive and torsional resistance.
Steel plate: Used to create large-sized welded beams or as gusset plates in connections.
4.2. Classification of Structural Steel by Chemical Composition
Carbon Steel: The most common type of steel used in construction, without alloying elements added. Depending on the carbon content, it is divided into low carbon steel (mild steel), medium and high carbon steel. Mild steel has high ductility, is easy to process, and is often used for general structures.
High Strength Low Alloy Steel (HSLA): Small amounts of other alloying elements are added to enhance strength and corrosion resistance without significantly increasing cost.
Tempered alloy steel: Has undergone heat treatment to achieve very good strength and ductility, often used in construction works requiring high technical requirements.
Conclude
Choosing between Frame, Truss, Arch, Space, and Cable steel structures does not have a single answer for every project. Each solution has its own advantages and limitations, suitable for specific requirements in terms of span, function, architectural aesthetics and investment budget.
- Frame construction is a versatile and popular choice for most residential and industrial construction.
- Truss and Space Structures are the answer to the problem of large spans, creating open spaces.
- Arch and Cable structures offer unique, iconic architectural solutions but come with technical challenges and higher costs.
A sound decision requires careful analysis from qualified and experienced structural engineers. By understanding the nature of each type of structure and carefully considering the project factors, investors can ensure that their projects are not only safe and sustainable, but also economically and aesthetically optimal.
Hai Long Steel Structure – A Reliable Partner For Every Project
Modern steel fabrication technology has marked a major step forward in the performance, quality and sustainability of construction projects. Improvements in design, manufacturing and management help to optimise costs, minimise risks and ensure that structures meet the highest safety standards.
Choosing the right steel structure processing partner is the decisive factor for the success of each construction project. In the context of the market increasingly demanding high quality, progress and safety, Hai Long Steel Structure Proud to be the leading brand trusted by many large domestic and foreign investors:
- 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, three steel structure factories with a productivity of nearly 50.000 tons/year, ensuring quick, 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
