The system is mainly composed of steel columns and rafters connected by rigid joints, forming a stable portal frame capable of transferring vertical and horizontal loads efficiently.

Compared with traditional reinforced concrete structures, portal frame steel buildings offer lighter structural weight, larger clear spans, faster installation, flexible interior space, and easier future expansion.

We provide customized portal frame solutions covering structural design, steel fabrication, surface treatment, inspection, export packing, delivery, and installation guidance according to project drawings, building dimensions, load requirements, and local engineering standards.

Main Components

A complete portal frame structure typically includes:

• Main steel columns

• Steel rafters

• Roof beams

• End-wall columns

• Roof purlins

• Wall girts

• Horizontal bracing

• Vertical cross bracing

• Tie rods

• Eave struts

• Connection plates

• High-strength bolts

• Anchor bolts

• Base plates

• Roof and wall supporting members

Typical Technical Parameters

Manufacturing Process

1. Drawing Review

The engineering team reviews structural drawings, dimensions, connection details, and fabrication requirements.

2. Material Preparation

Steel materials are selected and prepared according to approved production documents.

3. CNC Cutting

Steel plates and sections are cut according to required dimensions.

4. Assembly

Individual steel parts are positioned and assembled before welding.

5. Welding

Structural members are welded according to fabrication requirements and approved procedures.

6. Drilling

Bolt holes and connection holes are processed according to shop drawings.

7. Dimensional Inspection

Dimensions, hole positions, straightness, and assembly accuracy are checked.

8. Surface Preparation

Steel surfaces are cleaned and prepared before painting or galvanizing.

9. Coating / Galvanizing

The selected corrosion protection system is applied.

10. Final Inspection

Finished components are inspected before packing.

11. Marking & Packing

Members are marked according to drawings and installation sequence.

12. Container Loading

Components are organized for efficient international transportation.

Why Choose Our Portal Frame Structure?

Custom Engineering

Structures can be customized according to drawings, dimensions, loads, and project requirements.

Factory-Direct Manufacturing

Steel components are fabricated directly at the production facility for better control over quality, schedule, and manufacturing coordination.

One-Stop Supply

Services can cover:

Design → Material Preparation → Fabrication → Inspection → Surface Treatment → Packing → Export → Installation Guidance

FAQ

1. What is a Portal Frame Structure?

A portal frame structure is a structural system consisting mainly of steel columns and rafters connected through rigid joints. It is commonly used for warehouses, workshops, factories, agricultural buildings, and other large-span structures.

2. What are the main advantages of a portal frame building?

The main advantages include lightweight construction, large clear spans, fast installation, flexible layouts, factory fabrication, easier transportation, and convenient future expansion.

3. Can you customize the portal frame according to my drawings?

Yes. The structure can be fabricated according to customer drawings, structural specifications, building dimensions, and project requirements.

4. Can you provide structural design if I do not have drawings?

Yes. If you provide basic information such as project location, building dimensions, intended use, wind load, snow load, and other requirements, a customized structural solution can be developed.

5. What building sizes can you manufacture?

Portal frame structures are customized rather than limited to one standard size. Building width, length, height, span, and column spacing are determined according to the project requirements and engineering design.