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New Kind of Pre-Engineered Prefabricated Light Steel Structure Warehouse
US$30.00-100.00
200 Square Meters
Product profile
Customization
AvailableType
Light Section SteelSteel Frame
Steel Tube, GalvanizedModel NO.
DG-W11Bracing
Steel Purlin, GalvanizedMaintenance
Sandwich Panel, EPS, PU, Rock Wool, etc.Roof
Colorful Steel Sheet, Sandwich PanelWall
Colorful Steel Sheet, Sandwich PanelStandard
GB, ASTM, DIN, JIS, AISI, BSTrademark
Quality Carbon Structural Steel and Alloy Structural SteelForming
Hot-Rolled SteelConnection Form
Welded ConnectionMember
Steel BeamType of Steel For Building Structure
High-Strength SteelCarbon Structural Steel
Q235Residential Wall Structure
ConnectorApplication
Steel Workshop, Steel Structure Platform, Steel Fabricated House, Structural Roofing, Frame PartTransport Package
BulkSpecification
Q235, Q345Trademark
DGOrigin
ChinaHS Code
7308900000Production Capacity
20000ton/YearKey features
18 Years Manufacturing Experience: Over 18 years of experience in producing steel structure warehouses and workshops.
Certified Quality Assurance: ISO9001:2008, SGS, and BV certified with a team of 35 national registered engineers.
Custom Design and Quote: Design and quote based on client drawings, requests, and local climate parameters.
High Production Capacity: Annual output includes 20,000T H steel, 15,000T C steel, and 20,000 sqm sandwich panels.
Easy Installation Support: Factory supplies steel materials along with professional engineer installation guides.
Versatile Material Options: Available in Q345B/Q235B steel with PU, EPS, or Rock Wool sandwich panels for roofs and walls.
Global Market Experience: Exporting to North America, South America, Europe, Asia, Africa, and Oceania since 2003.
Cost-Effective Recycling: Low cost steel structure industrial buildings designed for easy installation and maintenance.
Company profile

Business Type: Manufacturer/FactoryExport Year: 2003-07-29Nearest Port: Qingdao PortAverage Response Time: >24hTerms of Payment: LC, T/T, D/PInternational Commercial Terms(Incoterms): FOB, CFR, CIF, EXW
AI-Powered supplier vetting
SummaryQingdao Doublegrand Metal Products Co., Ltd. is identified primarily as a manufacturer/factory of steel structures and related prefabricated building products, although another record describes the company as a trading company. The supplier states that it has exported to more than 30 countries across six continents and began exporting in 2003. Its stated capabilities include design, manufacturing, delivery, installation, and after-sales service, with production equipment, two production lines, ISO 9001 certification, and dedicated quality-control and R&D personnel. It reports substantial annual production capacity and that 90% of sales are exports. The evidence supports strengths in certification, production, customization, export experience, and service scope. Financial credibility cannot be assessed because the available registered-capital information is excluded from consideration and no other financial evidence is provided.
Supplier typeThe supplier is explicitly identified as a Manufacturer/Factory producing steel structures, warehouses, workshops, prefabricated buildings, and related products. However, a separate company-information record describes its company nature as a trading company, creating a classification inconsistency that prevents an entirely unqualified assessment.
CertificationsThe supplier reports holding ISO 9001 certification and also states that Asia Inspection, SGS inspection, and other third-party inspections are accepted. This is explicit evidence of a formal quality-management certification and willingness to accommodate external inspection.
After-Sales capabilityThe supplier states that it provides one-stop service covering design, manufacture, delivery, installation, and after-sales service, and describes a customer-oriented professional relationship. These statements directly support the existence of an after-sales service offering, although no detailed service standards or response metrics are provided.
R&D capabilityThe supplier reports that it can develop designs independently, provide suitable proposals, and combine sales and engineering personnel to create building models and designs. It also reports 6–10 years of R&D engineer experience and advanced CNC equipment, supporting design and engineering capability, but not necessarily product or process innovation beyond customization.
Production capacityThe supplier reports more than 3,000 tons of monthly capacity, annual capacity of 200,000 tons for steel structures, 200,000 meters of galvanized wall and roof cladding, and 30,000 tons of galvanized C&Z purlines. It also reports two production lines, CNC and machining equipment, inspection at every stage, and pre-assembly before delivery, providing explicit evidence of substantial production capability.
Customization capabilityThe supplier states that it manufactures strictly according to customer drawings and requirements, can design suitable proposals independently, and performs manufacturing and inspection according to drawings. These statements directly demonstrate both drawing-based production and supplier-supported design customization.
Client casesThe supplier states that it has exported to more than 30 countries across six continents, has more than 10 years of experience, and began exporting in 2003. This supports broad international delivery experience, but the slices do not identify specific customers, projects, or independently verifiable case details.
Product Q&A
Q:What materials are used for the steel structure?
A:
Main steel structures use Q345B or Q235B steel, including welded H/I steel beams, C/Z section purlins, and galvanized tubes.
Q:Can the design be customized to my requirements?
A:
Yes, we provide design and quote services based on client drawings, specific requests, and local climate conditions like wind or snow load.
Q:What certifications does the factory hold?
A:
The factory holds ISO9001:2008, SGS, and BV certifications, supported by a team of 35 national registered engineers and 120 technicians.
Q:What is the average lead time for production?
A:
Lead time is 1-3 months during peak season and approximately one month during the off-season.
Q:How are the steel structures packaged and shipped?
A:
Items are shipped as bulk cargo in 20GP or 40GP/40OT containers, or according to specific client requests.
Send Inquiry
*To:
Qingdao Doublegrand Metal Products Co., Ltd.
Qingdao Doublegrand Metal Products Co., Ltd.*Content:
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