A large-span pipe truss space structure is a structural system composed of interconnected steel tubular members arranged to efficiently transfer loads over large distances. Truss structures are widely used in large industrial buildings, exhibition centers, stadiums, transportation terminals, bridges, warehouses, and other buildings requiring large column-free spaces.

Because steel trusses are commonly used as roof-supporting structures, they are also widely referred to as roof trusses.

Compared with conventional solid-beam systems, pipe truss structures offer excellent structural efficiency, reduced self-weight, high load-bearing capacity, and greater architectural flexibility, making them an ideal solution for modern large-span buildings.

Types of Steel Trusses by Shape

According to their external geometry, steel trusses can generally be divided into the following types:

1. Parallel Chord Truss

A parallel chord truss has upper and lower chords arranged approximately parallel to each other.

Advantages:

• Simple and regular structural form

• Suitable for standardized fabrication

• Convenient for double-layer structural layouts

• Easy to manufacture and install

• Suitable for industrial and commercial buildings

However, the internal force distribution of the members may be less uniform compared with some optimized truss configurations.

2. Polygonal or Curved Chord Truss

Polygonal and curved chord trusses are designed according to the structural load distribution. Their shape can approximate the bending moment diagram of a simply supported beam under uniform loading.

This configuration allows forces to be distributed more efficiently throughout the structure.

Main advantages include:

• More uniform force distribution

• Efficient use of structural steel

• Excellent large-span capability

• Reduced material consumption

• Attractive architectural appearance

Because of their geometry, fabrication and connection detailing may be more complex.

3. Triangular Truss

Triangular trusses are commonly used for pitched roof systems.

Although the internal forces may not be distributed as evenly as in some other truss configurations, the inclined shape is particularly suitable for roof drainage and architectural applications.

They are commonly used in:

• Industrial workshops

• Warehouses

• Factory buildings

• Sports facilities

• Large-span roof systems

Types of Trusses by Structural Configuration

According to their geometric composition, trusses can also be classified into three main types.

1. Simple Truss

A simple truss is formed from a basic triangular framework and gradually extended by adding additional triangular units.

The triangular configuration provides excellent geometric stability and allows structural loads to be efficiently transferred between members.

2. Compound Truss

A compound truss consists of several simple trusses connected together to form a larger and more stable structural system.

This configuration is suitable for projects requiring greater spans, higher load-bearing capacity, or more complex architectural layouts.

3. Complex Truss

Complex trusses include structural arrangements that cannot be classified as simple or compound trusses.

They are generally designed for special architectural requirements, complex loading conditions, or large-scale engineering projects.

Classification by Horizontal Thrust

Steel trusses can also be classified according to whether horizontal thrust is generated at the supports.

1. Beam-Type Truss Without Horizontal Thrust

A beam-type truss transfers loads primarily through axial forces within the upper chord, lower chord, and web members.

Compared with conventional solid steel beams, truss structures can significantly reduce structural dead weight while maintaining excellent load-bearing performance.

The upper and lower chords mainly resist bending-related axial forces, while the web members primarily transfer shear forces.

Key benefits include:

• Efficient structural performance

• Reduced steel consumption

• Lower structural self-weight

• High load-bearing capacity

• Suitable for large-span buildings

2. Arch-Type Truss with Horizontal Thrust

Arch-type trusses generate horizontal thrust at their supports.

By combining the arch action with a truss system, the structure achieves excellent overall rigidity and high spanning capability.

Main advantages include:

• Excellent structural integrity

• Strong large-span capability

• Efficient load transfer

• Reduced steel consumption

• Suitable for large roof structures

• Flexible architectural design

Advantages of Large-Span Pipe Truss Structures

Large-span steel pipe truss structures provide several important benefits for modern construction:

• Large column-free space – ideal for buildings requiring open interior layouts.

• High structural strength – tubular steel members provide excellent load-bearing performance.

• Lightweight structure – reduces the overall dead load compared with conventional structural systems.

• Efficient material utilization – structural members mainly carry axial tension and compression.

• Flexible architectural design – suitable for curved, arched, pitched, and other complex roof forms.

• Factory prefabrication – components can be fabricated and inspected before delivery to the construction site.

• Fast installation – prefabricated steel components help shorten on-site construction schedules.

• Excellent durability – appropriate coating and surface treatment systems provide reliable corrosion protection.

Typical Applications

Large-span pipe truss space structures are widely used in:

• Industrial factories

• Large-span workshops

• Warehouses and logistics centers

• Exhibition halls

• Sports stadiums

• Gymnasiums

• Airport terminals

• Railway stations

• Convention centers

• Shopping centers

• Aircraft hangars

• Large roof structures

• Bridges and transportation facilities

Custom Large-Span Steel Truss Solutions

Large-span pipe truss systems can be customized according to project span, loading conditions, architectural requirements, wind loads, seismic requirements, roofing systems, and local engineering standards.

From structural design and engineering detailing to steel fabrication, quality inspection, surface treatment, packing, export, and installation support, customized steel truss solutions can help meet the requirements of different industrial and commercial construction projects.