The system consists of rigidly connected steel columns and rafters that create a strong structural frame while maintaining a relatively lightweight building system.

Portal frames are particularly suitable for projects that require:

• Large unobstructed interior areas

• Fast project execution

• Flexible building dimensions

• High structural efficiency

• Factory-controlled fabrication

• Simplified site assembly

• Future building extension

Main Structural System

A portal frame building generally includes three major systems.

Primary Steel Frame

The primary structure carries the main building loads.

Typical components include:

• Main steel columns

• Roof rafters

• Haunch sections

• Ridge joints

• End-frame columns

• Base plates

• Connection plates

Secondary Steel Members

Secondary components support roofing and wall systems while improving overall building stability.

These may include:

• Z purlins

• C purlins

• Wall girts

• Eave struts

• Tie rods

• Sag rods

• Horizontal bracing

• Vertical bracing

Building Envelope

Optional building envelope materials include:

• Corrugated roofing sheets

• Steel wall sheets

• Sandwich panels

• Thermal insulation

• Ridge caps

• Flashings

• Gutters

• Downpipes

Technical Parameters

Available Building Configurations

Standard Single-Span Portal Frame

Designed for buildings requiring wide open space without central columns.

Typical applications:

• Workshops

• Warehouses

• Maintenance facilities

Multi-Span Portal Frame

Multiple portal frames can be combined to create very wide industrial buildings.

Suitable for:

• Large factories

• Logistics centers

• Processing plants

• Distribution centers

Portal Frame with Crane System

The structure can be designed with:

• Crane beams

• Supporting brackets

• Additional column reinforcement

Suitable for industrial facilities using overhead cranes.

Portal Frame with Mezzanine

An internal mezzanine can create additional:

• Office space

• Storage space

• Equipment areas

• Working platforms

Portal Frame with Loading Canopy

Exterior steel canopies can be installed for:

• Loading zones

• Entrances

• Truck areas

• Covered working zones

Production Process

Step 1 – Drawing Confirmation

Production drawings and structural details are reviewed before fabrication.

Step 2 – Material Preparation

Steel plates and sections are prepared according to approved specifications.

Step 3 – CNC Cutting

Components are accurately cut according to shop drawings.

Step 4 – Assembly

Steel plates and profiles are positioned to form columns, rafters, and other components.

Step 5 – Welding

Structural members are welded according to fabrication procedures.

Step 6 – Drilling

Connection holes are processed for bolts and assembly.

Step 7 – Correction & Inspection

Steel members are checked for straightness, dimensions, and fabrication accuracy.

Step 8 – Surface Treatment

Painting or galvanizing is completed according to project requirements.

Step 9 – Identification

Each structural component can be marked according to erection drawings.

Step 10 – Packing & Shipping

Components are organized and packed for overseas transportation.

FAQ

1. What is a portal frame structure?

A portal frame structure is a rigid steel framing system formed mainly by columns and roof rafters. It is commonly used for large-span industrial and commercial buildings.

2. Why are portal frames widely used for warehouses?

They provide large open spaces, require fewer internal columns, can be prefabricated in the factory, and are relatively fast to install.

3. Can the structure be customized?

Yes. Building size, span, height, roof slope, bay spacing, steel members, surface treatment, and accessories can be customized according to project requirements.

4. Can you produce according to our drawings?

Yes. Fabrication can be carried out according to approved structural or shop drawings provided by the customer.

5. Can you provide a complete steel building package?

Yes. In addition to the main steel frame, roof panels, wall panels, insulation, bracing systems, gutters, flashings, and other accessories can also be supplied.