ZSJH Steel supplies complete steel purlin systems for industrial, commercial and prefabricated steel buildings. Designed as secondary framing members, our purlins connect with the main steel frame to support roofing sheets, insulated panels and exterior wall systems.

Rather than supplying only standard sections, we manufacture each order according to the approved drawings and bill of materials. Section profiles, member lengths, punching patterns and protective finishes can be matched to the actual building layout, helping contractors reduce modification work during installation.

Complete Purlin and Girt System

A complete system can include:

• C-shaped roof purlins

• Z-shaped continuous purlins

• Wall girts

• Eave struts

• Bridging and anti-sag members

• Cleats and connection plates

• Tie rods and braces

• Bolts and matching fasteners

• Pre-punched connection holes

• Identification marks for installation

Components can be packed by building area, roof zone or grid line to support organized unloading and site assembly.

Available Configurations

Designed for Efficient Installation

Accurate fabrication is important for secondary steel framing because inconsistent dimensions or incorrect hole positions can delay the entire roof and wall installation process.

Our production team uses controlled forming, cutting and punching procedures to manufacture purlins that correspond with the approved drawings. Pre-punched holes and clear member identification help reduce measuring, drilling and sorting work at the construction site.

Installation Advantages

• Members arrive cut to the required lengths

• Connection holes can be completed before shipment

• Lightweight sections are easier to handle on site

• Bolted connections support faster assembly

• Labeled bundles simplify material organization

• Standardized profiles improve installation consistency

• Nestable sections help optimize transport space

Material and Finish Options

Steel purlins can be produced from galvanized or coated steel selected according to the structural design and service environment.

Available options may include:

• Galvanized steel coil

• High-strength structural steel

• Painted carbon steel

• Project-specific protective coatings

• Different steel thicknesses and yield strengths

• Customized zinc coating requirements

Material grade, section thickness and coating specification should be confirmed based on the building design, local environment and project requirements.

Where Steel Purlin Systems Are Used

Our purlin and girt systems are suitable for a wide range of steel buildings, including:

• Large-span industrial workshops

• Manufacturing plants

• Distribution warehouses

• Logistics centers

• Agricultural storage buildings

• Poultry and livestock buildings

• Vehicle maintenance facilities

• Commercial metal buildings

• Cold storage facilities

• Aircraft and equipment hangars

• Prefabricated steel buildings

• Roof renovation and extension projects

They can be used with corrugated roofing sheets, insulated sandwich panels, standing seam roofs and different wall cladding systems.

Project-Based Manufacturing Service

Every steel building has different spans, frame spacing, roof loads and connection details. ZSJH Steel provides project-based fabrication instead of limiting customers to a small selection of fixed products.

To prepare the correct solution, customers can provide:

• Structural drawings

• Purlin layout drawings

• Section dimensions

• Material specifications

• Member lengths

• Hole locations

• Required quantities

• Surface treatment requirements

• Project destination

• Packaging and marking instructions

Production and Inspection

The purlin manufacturing workflow includes material preparation, roll forming, length cutting, CNC punching, dimensional checking, marking and packaging.

Inspection focuses on:

• Profile shape and section dimensions

• Material thickness

• Overall member length

• Straightness and appearance

• Hole size and center distance

• Surface coating condition

• Product markings and quantities

• Bundle protection and shipping labels

FAQ

Can the purlins be used as wall girts?

Yes. C and Z sections can be configured as wall girts to support metal sheets or insulated wall panels. The final section must be selected according to the wall load and frame spacing.

Can you supply different lengths in one order?

Yes. Members can be cut to multiple lengths based on the approved bill of materials and marked for the corresponding installation location.

Can you manufacture special hole patterns?

Yes. Hole diameter, spacing and position can be processed according to confirmed shop drawings. Clear drawings should be approved before production begins.

Are connection accessories available?

Yes. Cleats, tie rods, bridging members, bolts and other related accessories can be supplied as part of the secondary framing package.

Can each member be labeled?

Yes. Member numbers, bundle numbers and installation references can be added according to the customer’s erection drawings and marking requirements.