Sandwich Panel Mills Bolt Connection Steel Structure Factory
Warehouse
Product Attributes
Raw Steel Material
Q235B, Q355B, ASTM A36
Application
Steel Workshop, Steel Structure Platform, Structural Roofing, Frame
Part
Surface Treatment
Painting or Hot-DIP Galvanized
Wall and Roof
Steel cladding sheet, Sandwich Panel
Columns & Beams
H-Section Steel
Shot Blasting Level
SA 2.5
Certification
CE, AISC, SGS, BV, ISO, GB
Installation
Engineer Guidance on Site
Drawing
CAD, TEKLA, 3D Model, PKPM, BIM
Transport Package
Standard Export Package or Customer's Requirement
Production Capacity
30000ton/Year
Features
Prefab Steel Structure, Large Span, Multi-Floor
Connection Form
Bolt Connection
Product Description
Our steel structure buildings feature high fire resistance and
strong corrosion resistance. The primary load-bearing components
consist of steel columns, beams, and roof trusses, connected
through welding, bolts, or rivets.
The roof and walls can be constructed using composite panels or
veneers. Galvanized sheet metal prevents rust and corrosion, while
self-tapping screws ensure tight connections between panels to
prevent leakage. Composite panels with PU, EPS, fiberglass, or rock
wool cores provide excellent thermal insulation, heat resistance,
and fire-retardant properties. Brick walls can also be used for
steel structure maintenance.
These structures are ideal for large-scale workshops, warehouses,
supermarkets, entertainment centers, and modular steel garages.
Material Specifications
Main Steel Frame
Column: Q235, Q355 Welded H Section Steel
Beam: Q235, Q355 Welded H Section Steel
Secondary Frame
Purlin: Q235 C and Z purlin
Knee bracing: Q235 Angle Steel
Tie Bar: Q235 Circular Steel Pipe
Bracing: Q235 Round Bar
Column and Horizontal Bracing: Q235 Angle Steel, Round Bar or Steel
Pipe
Maintenance System
Roof Panel: EPS Sandwich Panel / Fiber Glass Sandwich Panel / Rock
Wool Sandwich Panel / PU Sandwich Panel / Steel Sheet
Wall Panel: Sandwich Panel / Corrugated Steel Sheet
Accessories
Window: Aluminium Alloy Window / PVC Window
Door: Sliding Sandwich Panel Door / Rolling Metal Door / Personal
Door
Downspout: PVC
Structure Usage
Up to 50 years
Finishing Options
Vast array of colors and textures available
Paint Options
Alkyd painting, two primary painting, two finish painting (gray
paint, red paint, white paint, epoxy zinc etc.) Or Galvanized
Project Showcase
Project Usage: High-End Intelligent Hydraulic Machine Tool Equipment
Size of the plant: Total Area 9,702 Sqm
Steel Structure Weight: 630Ton
Project Usage: Logistics Steel Warehouse For High-Speed Rail Station
Size of the plant: Total Area 24,570 Sqm
Steel Structure Weight: 985Ton
Project Usage: Textile Manufacturing Machine Tool Equipment
Size of the plant: Total Area 6,615 Sqm
Steel Structure Weight: 750Ton
Our Company
Qingdao Ruly Steel Engineering Co., Ltd is a professional steel structure fabrication and engineering
company located in Qingdao, China. We specialize in steel structure
design, research and development, manufacturing, and installation
for various projects including prefabricated steel workshops,
warehouses, logistics parks, high-rise buildings, exhibition
centers, stadiums, airports, bridges, power plants, and industrial
facilities.
Our 35,000 square meter facility includes a 20,000 square meter
processing plant with over 100 employees. Our monthly production
capacity exceeds 1,500 tons of steel structures, including
light/heavy H steel, BOX steel, cross-shaped section steel, large
diameter submerged arc straight-weld pipes, and various machining
components.
We maintain ISO9001, ISO14001, and GB/T28001 certifications, along
with ASTM and SGS product certifications. Our commitment to
quality, technological advancement, and continuous innovation
drives our success in delivering optimal solutions for our clients.
Our Certifications
Our Services
- Structural steel fabrication, painting, galvanizing, and
pre-assembly
- Design, fabrication, and installation of prefabricated steel
structures
- Detailed fabrication drawings based on architectural plans
- Technical advice for usage, maintenance, and improvements
Quality Control
Raw material quality control:
- Thickness tolerance <0.25mm
- Yield and tension strength testing in-house
- Third party inspection certificate
- Supply traceable mill certificate
Structural steel fabrication quality control:
- 100% testing dimension tolerance <1mm
- 20% sample welding line ultrasonic testing
- 20% magnetic powder testing
- Third-party inspection assistance
Shot blasting and painting quality control:
- Shot blasting grade Sa. 2.5
- Paint primer within 5 hours after shot blasting
- Dry Film Thickness (DFT) >75UM
Pre-assembly testing of all connection details
Frequently Asked Questions
Q: Are you a manufacturer or trading company?
A: We are a manufacturer and welcome visits to our facility. Our
quality control processes and professional team ensure you receive
the best products at competitive prices.
Q: How does your pricing compare to competitors?
A: We strive to offer the best price for equivalent quality and the
best quality for equivalent prices, working to reduce your costs
while guaranteeing product excellence.
Q: Can you provide installation support?
A: We provide detailed installation drawings and can send engineers
or a full installation team upon request.
Q: Do you accept container loading inspections?
A: Yes, we welcome inspectors at any stage of production, including
container loading.
Q: Do you offer design services?
A: Yes, we provide complete design solutions using AutoCAD, PKPM,
MTS, 3D3S, Tarch, and Tekla Structures for complex industrial
buildings.
Q: What is your typical delivery time?
A: Delivery time depends on order quantity, typically 40 days to
nearest Chinese seaport after deposit receipt.
Q: How can I request a quotation?
A: Contact us via email, phone, WhatsApp, or Viber - we respond
within 8 hours.
Packing and Transport
All structural components, panels, bolts, and accessories are
packed in standard export packages suitable for ocean
transportation, typically loaded into 40'HQ containers. Our skilled
workers use cranes and forklifts to ensure safe loading at our
factory.
Design Capabilities
For each project, we provide preliminary layout drawings, 3D Tekla
models, and installation drawings to support successful project
completion.
Why Choose Us?
- Professional design team capable of custom solutions
- Skilled fabrication team with advanced equipment
- Comprehensive project management from design to completion
- Dedicated quality control team
- Responsive after-sales service and maintenance support
Our Production Line
Custom Prefab Steel Structure Workshop Q235B Q355B ASTM A36
