Guangdong LiYou Steel Structure Engineering Co., Ltd.        +8619147784007     liyousteelstructure@outlook.com
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Galvanized Z Purlin for Steel Building

Purlins are also called purlins and trusses. They are horizontal roof beams perpendicular to the roof trusses or rafters, used to support rafters or roofing materials. Purlins are transverse bending (usually bidirectional bending) components and are generally designed as single-span simply supported purlins. Commonly used purlins are solid web type and light steel truss type.

Z-type purlins are particularly suitable for large slope roofs.
SIZES WE SUPPLY:
Thickness:1.2mm—3.0mm; Height:120mm—300mm
 
WhatsApp:(+86)18923185601
Telephone:(+86)18923185601
Email: Jenny11liyou@gmail.com

 
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Galvanized Z Purlins for Steel Buildings – Superior Roof Support Systems

High-Strength Z-Shaped Structural Purlins for Optimal Load Distribution

LiYou Steel manufactures precision-engineered galvanized Z purlins that provide exceptional structural performance for modern steel buildings. Our cold-formed Z-section steel offers superior load-bearing capacity and installation efficiency, making it the ideal choice for large-span roofing systems.

Key Advantages of Our Z Purlins

✅ Structural Superiority

  • Continuous span capability (up to 12m+)

  • Nesting design allows tighter spacing

  • 20% stronger than C purlins in bending

  • Better load transfer through overlapping

✅ Premium Material Quality
✔ G550 high-strength steel (550MPa yield)
✔ Hot-dip galvanized coating (Z275-Z450)
✔ Precision roll-forming (±0.8mm tolerance)
✔ Custom lengths up to 12 meters

✅ Installation Benefits

  • Faster assembly with nesting feature

  • Pre-punched holes for quick fastening

  • Lighter weight than traditional beams

  • Compatible with all roofing systems

Technical Specifications

Parameter Specification
Material Grade G550, Q235, Q345
Coating Z275-Z450 galvanized
Thickness 1.2-3.0mm
Flange Width 50-80mm
Web Height 120-300mm
Standard Length 6-12m

Optimal Applications

  1. Large-Slope Roofing Systems (5°-25° pitch)

    • Superior water-shedding performance

    • Enhanced wind uplift resistance

    • Ideal for standing seam roofs

  2. Industrial Warehouse Roofs

    • Supports heavy snow loads

    • Accommodates long spans

    • Compatible with insulation systems

  3. Solar Panel Mounting Structures

    • Pre-drilled for solar brackets

    • UV-resistant coating options

    • Anti-corrosion protection

  4. Curved Roof Applications

    • Flexible installation on radii

    • Maintains structural integrity

    • Aesthetic clean lines

Manufacturing Excellence

  1. Precision Roll-Forming (14-stage process)

  2. Computer-Controlled Punching

  3. Hot-Dip Galvanizing (450°C zinc bath)

  4. Quality Verification (coating thickness tests)

  5. Bundled Packaging (weather-resistant)

Why Choose LiYou Z Purlins?

✔ ISO 9001 & CE Certified manufacturing
✔ Custom hole patterns available
✔ Just-in-time global delivery
✔ Technical drawings provided
✔ Competitive factory-direct pricing

Project Example: Vietnam Logistics Hub

  • Structure: 100m×60m warehouse

  • Purlin Specs:

    • Z250×75×2.0mm

    • Z350 galvanized coating

    • 1.8m spacing

  • Performance:

    • Supported 1.2kN/m² equipment loads

    • Withstood 180km/h typhoon winds

    • Zero maintenance in 7 years


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Product Overview


Place of Origin:

Product Name:

Foshan, China (Mainland)

Steel Frame House

Material:

Q345 Q235 H Section Steel, C/Z Section Steel, Square Tube etc.

Standard:

Type:

GB

Steel Structure Frame

Size:

Color:

Up to Customer's Requirement

Graywhite, Blue, Red, etc..

Roof & Wall Material:

Insulation:

Sandwich Panel

EPS, Rockwool, Glass wool, PU etc..

Door & Windows:

Technology:

Steel Door, Aluminum Sliding Window, PVC Window

Welded steel, Hot Rolled Steel

Drawing Design:

Keywords:

AutoCAD, Tekla Structure, Vertex BD, SketchUp etc.

Big Metal Building Homes



Steel Frame House Material List



Components

Specification

Anchor Bolt

M30

High Strength Bolt

M20,10.9S

Common Bolt

M16

Galvanized Bolt

M12

Shear Nail

M16

Steel Column(Q345B)

HN600X200X10X15

Steel Column(Q345B)

HN300X150X6.5X9

Roof Column(Q345B)

HN350X175X6X9

Floor Main Beam(Q345B)

HN500X200X9X14

Floor Second Beam(Q345B)

HN350X175X6X9

Stair

∅16-bar+2.5mm Chequered Plate

Tie Rod

∅89*3.0

Horizontal Support

∅16

Roof Purlin(Galvanized)

C180*60*20*2.0

Wall Purlin(Galvanized)

C180*60*20*2.0

Connecting Plate

6mm~20mm Steel Sheet

Paint

2 Times Spray Paint

Roof Tile- EPS Sandwich panel

50mm Color Steel Thickness: 0.426

FRP Skylight Panel

Fiber Glass Reinforced Polyester

Outside Wall Panel -- EPS Sandwich panel

50mm Color Steel Thickness: 0.426

Floor Decking

1.5mm Galvanized Steel Sheet

Stair Handrail

口80*40+口40+口30+口20

Gutter

2.0mm Galvanized Gutter

Down Pipe

∅110PVC

Trimming

1.0mm Galvanized Steel Sheet

剖面图

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Steel Structure Building Applications

Livestock Shed, Garage, Plant, Warehouse, Workshop, Office Building, Hotel Building, Commercial Building , Residential House, Airplane Hangar, Outdoor Stadium Shed, Labour Camp, School, Exhibition Hall, Logistics Park, Refrigeration House, Resort, Dormitory Building, Shopping Mall


Steel Frame House

Steel Frame House



Why Choose Us


01 Customized Design

Offer professional building planning & drawing, and suitable steel components according to your requirements.

02 Quality Assurance

● Strict quality control

● Safe packing

● Quality inspection before shipment


03 After-sales service

Installation instruction on site

Installation technical team backup

Timely communication by Email & Phone



Certification



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Philippines and Thailand projects

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