Large-span and multi-storey steel structures are widely used in modern industrial and commercial construction because of their high strength, flexible layout, fast installation, and excellent adaptability.

Compared with conventional reinforced concrete structures, steel structures have a higher strength-to-weight ratio and can reduce the load on foundations. Prefabricated steel components are manufactured in the factory and assembled on site, helping shorten the construction period and improve installation accuracy.

For large-span buildings, steel trusses, grid structures, and space frame systems can create wide interior spaces with fewer intermediate columns. This provides greater flexibility for equipment arrangement, production lines, seating areas, exhibition spaces, storage operations, and commercial layouts.

For multi-storey buildings, the steel frame can be combined with steel decking, concrete floors, stair systems, wall systems, and roofing systems to create a complete building solution.

The structural layout, section sizes, connection methods, roof shape, floor system, surface treatment, and building envelope can all be customized according to the project requirements.

Main Structural Systems

Depending on the building function, span, height, load conditions, and architectural design, the project may use one or more of the following structural systems.

Multi-Storey Steel Frame

A multi-storey steel frame consists mainly of steel columns, steel beams, floor beams, bracing systems, and floor decking. It is suitable for commercial buildings, office buildings, industrial plants, warehouses, and public facilities.

Large-Span Steel Truss

Steel trusses are used to achieve large roof spans while reducing the number of interior columns. They are suitable for stadiums, exhibition halls, terminals, hangars, production workshops, and large storage buildings.

Space Frame Structure

A space frame is a three-dimensional structural system composed of interconnected steel members. It provides high rigidity, stable load distribution, and flexibility for curved, circular, oval, or irregular roof designs.

Irregular Steel Structure

Customized steel components can be designed and fabricated for buildings with special architectural shapes, curved edges, complex roof systems, or non-standard structural layouts.

Composite Steel Structure

The steel frame can be combined with reinforced concrete floors, steel decking, precast panels, glass curtain walls, sandwich panels, and other building materials.

Product Advantages

Large Clear-Span Space

Steel trusses and space frame systems can create spacious interiors with fewer columns, improving the use of internal space.

Flexible Customization

The building width, length, height, column spacing, roof shape, floor layout, connection details, and surface treatment can be customized.

High Structural Strength

The structure can be designed according to project loads, wind conditions, seismic requirements, equipment loads, and local building standards.

Lightweight Structure

Steel has a high strength-to-weight ratio, which can reduce the total structural weight and foundation load.

Fast On-Site Installation

Most steel components are prefabricated in the factory and assembled on site with bolts and welding, helping shorten the construction schedule.

Accurate Fabrication

Detailed drawings, digital modeling, and controlled factory production help ensure component dimensions and connection positions.

Suitable for Complex Designs

Steel structures can accommodate curved roofs, irregular plans, large cantilevers, multiple floors, and customized architectural requirements.

Easy Expansion and Modification

Steel buildings can be expanded, reinforced, or modified more easily than many traditional building systems.

Durable and Maintainable

With suitable surface treatment and regular maintenance, steel structures can provide reliable long-term performance.

Efficient Material Use

Structural optimization helps balance safety, fabrication efficiency, transportation requirements, and overall project cost.

Main Steel Components

The complete steel structure system may include:

• Steel columns

• Steel beams

• Welded H-section components

• Box columns

• Box beams

• Circular steel columns

• Steel roof trusses

• Space frame members

• Grid roof structures

• Floor beams

• Steel decking

• Horizontal bracing

• Vertical bracing

• Roof purlins

• Wall girts

• Tie rods

• Connection plates

• Base plates

• Anchor bolts

• High-strength bolts

• Staircases and platforms

• Customized welded steel components

Materials and Surface Treatment

The selection of steel grade and surface treatment depends on the structural design, project location, environmental conditions, and customer requirements.

Common steel materials include Q235B, Q355B, and equivalent international steel grades.

Available surface treatment options include:

• Shot blasting

• Anti-rust primer

• Intermediate coating

• Finish painting

• Hot-dip galvanizing

• Fire-resistant coating

• Corrosion-resistant coating

For coastal, humid, industrial, or highly corrosive environments, a more durable protective coating system can be selected.

Design and Engineering Service

ZSJH Steel can provide engineering and technical support based on the information supplied by the customer.

Our design and detailing services may include:

• Preliminary structural solution

• Structural layout optimization

• Load analysis

• Steel member selection

• Connection design

• Tekla detailing

• BIM modeling

• Fabrication drawings

• Assembly drawings

• Installation drawings

• Bill of materials

• Component numbering

• Packaging and loading plans

The structure can be designed according to the applicable standards and technical requirements of the destination country.

Manufacturing Process

1. Drawing Review

The engineering team reviews the architectural drawings, structural requirements, dimensions, loads, connection details, and applicable standards.

2. Structural Detailing

Detailed fabrication drawings and component models are prepared before production.

3. Material Inspection

Steel plates, profiles, bolts, welding materials, and other raw materials are checked before processing.

4. Cutting and Preparation

Steel plates and sections are cut according to the approved fabrication drawings.

5. Assembly and Welding

Steel members are assembled and welded using controlled production procedures.

6. Dimensional Inspection

The dimensions, hole positions, connection plates, and component geometry are checked.

7. Surface Treatment

Components are cleaned by shot blasting or other methods before painting or galvanizing.

8. Identification and Marking

Each component is marked according to the installation drawings and packing list.

9. Export Packaging

Steel components are packed according to their size, weight, loading sequence, and transportation requirements.

10. Container Loading and Delivery

A loading plan is prepared to improve container utilization and support efficient unloading at the project site.

Quality Control

Quality control is carried out throughout the fabrication process to help ensure that the components meet the approved drawings and technical requirements.

Inspection procedures may include:

• Raw material certificate review

• Steel grade verification

• Dimensional inspection

• Cutting quality inspection

• Welding appearance inspection

• Weld size inspection

• Bolt hole position inspection

• Component geometry inspection

• Surface preparation inspection

• Paint thickness inspection

• Component marking inspection

• Packing and loading inspection

Non-destructive testing can also be arranged according to project requirements.

Applications

This customized steel structure system is suitable for:

• Multi-storey industrial buildings

• Commercial complexes

• Shopping centers

• Office buildings

• Exhibition halls

• Convention centers

• Stadiums and sports facilities

• Airport terminals

• Railway stations

• Bus terminals

• Aircraft hangars

• Large production workshops

• Logistics centers

• Warehousing facilities

• Distribution centers

• Energy facilities

• Mining facilities

• Public buildings

• Special-shaped architectural projects

• Large-span roof projects

Why Choose ZSJH Steel

Customized Engineering Solutions

Each project is developed according to the building dimensions, functions, loading conditions, local climate, and construction requirements.

Integrated Project Service

We support structural design, detailing, fabrication, inspection, packaging, transportation, and installation guidance.

Professional Steel Fabrication

Steel components are manufactured according to approved drawings and controlled production procedures.

Support for Complex Structures

We can fabricate multi-storey frames, large-span trusses, space frames, box columns, welded beams, and customized steel components.

Export-Oriented Packaging

Components are numbered and packed according to the installation sequence and international transportation requirements.

Technical Installation Support

Installation drawings, component lists, connection details, and remote technical guidance can be provided.