What certifications does the product have?

Our products are ISO certified, ensuring quality and reliability for international markets.

How are the components packed for shipment?

Steel frames are packed in 40OT containers, while maintenance parts are packed in 40HQ or 40GP containers. Packing can also be arranged as per customer requirements.

Do you provide design services?

Yes, we provide comprehensive design services including structural drawings, hydroelectric plans, ventilation systems, and heating systems based on your needs.

Hanger (DG4-003)

Name: Durable Steel Structure Prefabricated House/Shed/Hanger (DG4-003)
Brand: Qingdao Doublegrand Metal Products Co., Ltd.
SKU: 708966735

Shandong, ChinaQingdao Doublegrand Metal Products Co., Ltd.

US$40.00-60.00

300 Square Meters

Product profile

Customization

Available

Structure

Steel Structure

Wall and Roof

Sandwich Panel, EPS, PU, Rock Wool, Glass Wool

Model NO.

DG4-003

Insulation Thickness

50-150mm

Surface

HDG or Painted

Connection

Screws, Bolts

Material

Sandwich Panel

Usage

Dormitories, Temporary Offices, Houses

Certification

ISO

Transport Package

160-250m2 Can Be Packed in 40ot

Specification

Q235B, sandwich panel

Trademark

Origin

China

HS Code

7308900000

Production Capacity

1800 Tons Per Month

Key features

Custom Design Service: Design tailored to customer requirements including size, layout, and climate conditions.

Durable Steel Frame: Main structure uses Q235/Q345 steel with welded H-sections for high strength and stability.

Flexible Cladding Options: Roof and walls support sandwich panels (EPS, PU, Rock Wool) or corrugated steel sheets.

Long Lifespan: Building lifespan ranges from 25-50 years depending on surface treatment and material.

Fast Delivery: Standard delivery time is 20-25 days for production and preparation.

ISO Certified Quality: Manufacturing process and products meet ISO certification standards for quality assurance.

Complete System Solution: Includes structural design, hydroelectric, ventilation, and heating system planning.

Versatile Application: Suitable for dormitories, temporary offices, warehouses, workshops, and residential houses.

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:Can the house be customized?

Yes, we provide full customization for size (length, width, height), layout, door/window arrangement, and material selection based on your specific requirements.

Q:What materials are used for the structure?

The main structure uses Q235 or Q345 steel with welded H-sections. Cladding options include sandwich panels (EPS, PU, Rock Wool, Glass Wool) or corrugated steel sheets.

Q:What is the expected lifespan of the building?

The lifespan is 25-50 years. Painted surfaces typically last 18-20 years, while hot-dip galvanized surfaces can last 45-50 years.

Q:What information do I need to provide for a quote?

Please provide building dimensions (length, width, height, eave height), door/window details, local climate data (wind speed, snow load, earthquake degree), and preferred wall/roof materials.

Q:What is the delivery time?

The standard delivery time is 20-25 days. During peak seasons, lead times may extend to 1-3 months, while off-season lead times are about one month.