Do you provide installation support?

Yes, besides supplying steel materials, we provide engineer installation guides to ensure easy installation and maintenance.

What is the production capacity?

Annual production includes 20,000T H steel, 15,000T C steel, and 3,000T Z steel. Monthly output includes 200 prefab houses and 20,000 sqm of sandwich panels.

How is the product packaged for shipping?

Products are naked loaded in shipping containers (20GP, 40HP, 40GP, 40OT) or packaged as per specific requests.

Supplier

Name: Prefab Light Steel Structure House/ Prefabricated Construction Workshop/China Manufacture/Supplier
Brand: Qingdao Doublegrand Metal Products Co., Ltd.
SKU: 729520755

Shandong, ChinaQingdao Doublegrand Metal Products Co., Ltd.

US$30.00-100.00

200 Square Meters

Product profile

Customization

Available

Connection Form

Welded Connection

Steel Frame

Galvanized Tube

Model NO.

DG-HW02

Bracing

C Purlin, Galvanized

Maintenance

Sandwich Panel, EPS, PU, Rock Wool, etc.

Roof

Colorful Galvanized Steel Sheet

Wall

Colorful Galvanized Steel Sheet

Type

H-Section Steel

Standard

GB, ASTM, DIN, JIS, AISI, BS

Trademark

Quality Carbon Structural Steel and Alloy Structural Steel

Forming

Hot-Rolled Steel

Member

Steel Beam

Type of Steel For Building Structure

High-Strength Steel

Carbon Structural Steel

Q235

Residential Wall Structure

Wallboard

Application

Steel Workshop, Steel Structure Platform, Steel Fabricated House, Structural Roofing, Frame Part

Transport Package

Bulk

Specification

Q235, Q345

Trademark

Origin

China

HS Code

7308900000

Production Capacity

20000t/Year

Key features

14 Years Manufacturing Experience: Over 14 years of specialized experience in steel structure production and supply.

Multi-Certification Compliance: Holds ISO9001:2008, SGS, and BV certifications for quality assurance.

Professional Technical Team: Supported by 35 national registered engineers and 120 technicians.

High Production Capacity: Monthly output of 200 prefab houses and 20,000T H steel annually.

Custom Design Capability: Designs based on client drawings, dimensions, and local climate requirements.

Easy Installation Support: Provides engineer installation guides for easy assembly and maintenance.

Versatile Material Options: Offers Q235B/Q345B steel with various insulation panels like EPS, PU, or Rock Wool.

Flexible Packaging & Shipping: Naked loaded in containers or as requested; ships via 20GP/40GP/40HP/40OT.

Company profile

Qingdao Doublegrand Metal Products Co., Ltd.

Shandong, China

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?

Main steel is Q345B or Q235B. Options include welded H/I steel, C/Z purlins, and various insulation panels like EPS, fiberglass, rock wool, or PU.

Q:Can the design be customized?

Yes, we design according to client drawings, dimensions, and specific requests, considering local climate factors like wind speed, snow load, and earthquake grade.

Q:What certifications does the company hold?

We hold ISO9001:2008, SGS, and BV certifications, ensuring high quality and compliance with international standards.

Q:What is the average lead time?

The lead time is 1-3 months during peak season and one month during the off-season.

Q:What are the payment terms?

We accept LC, T/T, and D/P as terms of payment.