What quality certificates are required for structural building components?

What quality certificates are required for building structural components? (2026 standards): ① Certificates of Conformity—factory certificate of conformity + installation instructions (Shanxi/Zhejiang); ② Material Properties—steel re-test report, weldability test report, raw steel bar inspection report (Yan’an/Foshan); ③ Inspections—welding seam quality inspection report, connection component inspection report, mechanical connection records (Yan’an/Wenzhou); ④ Concrete—concrete strength inspection report, 28-day standard curing and field-cured (same-condition) test results (Changsha/Ningbo); ⑤ Records—concealed work acceptance records, witnessed testing records, quality conformity certificates for raw materials and finished products (Heilongjiang/Zhejiang). In summary, the required quality certificates for building structural components include: factory certificate of conformity + installation instructions;
steel re-test report/weldability test report/raw steel bar inspection report; welding seam quality inspection report/connection component inspection report/mechanical connection records; concrete strength inspection report (28-day standard curing and field-cured test results); concealed work acceptance records/witnessed testing records/quality conformity certificates for raw materials and finished products + Chinese-language labeling and performance test reports.

I. Factory Release and Material Certification (2026 Standard)

Factory release and material certification for structural components (consolidated from practices in Shanxi, Zhejiang, Yan’an, Foshan, and the industry at large):

• Certificates: Factory conformity certificate, installation instructions;
• Materials: Steel re-test report, weldability test report, raw steel bar inspection report;
• Parameters: Mechanical properties, processing properties, weight deviation;
• Chinese Documentation: Quality conformity certificate for raw materials and finished products, Chinese-language markings, and performance test reports;
• Conclusion: Conformity certificate and material certification complete.

II.
Inspection and Process Records (2026 Standard)

Inspection and process records for structural components (consolidated from practices in Yan’an, Changsha, Zhejiang, Heilongjiang, and the industry at large):

• Inspection: Weld quality inspection report, connection component inspection report, mechanical connection records;
• Concrete: Concrete strength inspection report, 28-day standard curing and field-cured (same-condition) curing records;
• Process: Rebar sleeve connection process inspection report, welded connection inspection report;
• Records: Concealed work acceptance records, witnessed testing records, construction test data;
• Conclusion: Inspection reports and process records filed.

III. Overseas B-Side Procurement and On-Site Implementation (2026 Standards)

Overseas B-side clients require quality certificates for structural components; implementation follows these procedures (based on industry best practices and case studies):

• Verify Compliance: Factory conformity certificates, installation manuals, and first-article inspection records—Compliance;
• Verify Material Properties: Steel re-testing/weldability tests/raw steel inspection reports—Material;
• Verify Inspections: Inspection reports for weld seams, connectors, mechanical connections, and concrete strength—Inspection;
• Verify Records: Acceptance records for concealed works, witnessed testing, and Chinese-language markings/performance test reports—Records;
• Risk Alerts: Verify certificate completeness, one-to-one correspondence, and Chinese-language markings—Verify completeness, correspondence, and markings.

Conclusion

What quality certificates are required for building structural components? In short: Factory certificates of conformity (for precast components, these include the factory certificate and installation instructions; quality compliance documents and process inspection reports for rebar connections—such as sleeve connections; concrete strength inspection reports; and other quality documents required by the contract—per Shanxi Department of Housing and Urban-Rural Development; documentation for precast components upon site arrival includes the first-unit acceptance record, factory certificate, concrete strength report, process inspection reports for rebar connections (e.g., sleeves), production process inspection files, concealed work acceptance records, and other contractually required quality documents—per Zhejiang Department of Housing and Urban-Rural Development); Material inspection (manufacturers of steel structural components for the main structure must provide steel re-test reports, weldability test reports, weld seam quality inspection reports, connection component inspection reports, and mechanical connection records—per Yan’an People’s Congress/Wenzhou Housing and Urban-Rural Development Bureau; factory certificates for raw rebar materials and inspection reports covering mechanical properties, processing performance, and weight deviation—per Foshan Nanhai; re-test reports for raw rebar, welded connection inspection reports, concrete strength reports (28-day standard curing and field-cured samples), and inspection/calibration/tensioning data for prestressing materials and equipment—per Changsha Housing and Urban-Rural Development Bureau); Acceptance records (steel structure completion acceptance requires quality compliance documents for raw materials and finished products; acceptance records covering Chinese-language labeling, performance test reports, sub-division engineering acceptance, concealed work inspections, on-site supervision records, and witnessed testing records—per Heilongjiang Department of Housing and Urban-Rural Development); and Trends in quality certificates for building structural components for 2026 (factory certificates / material inspections / process records).
Overseas B2B procurement strategy: Verify compliance (factory certificates/installation manuals/first-article inspection records), verify materials (steel re-testing/weldability tests/raw rebar inspection reports), verify inspections (welds/connectors/mechanical connections/concrete strength reports), verify records (concealed work acceptance/witnessed testing/Chinese labeling and performance testing), and mitigate risks (verify complete certification/ensure one-to-one correspondence/check for Chinese labeling)—this ensures a complete set of quality certificates for structural components.

Sources for data and case studies in this article: Factory certificates (Shanxi Department of Housing and Urban-Rural Development: Precast components must be accompanied by factory certificates, installation manuals, quality compliance documents and process inspection reports for rebar sleeve connections, concrete strength reports, and other contractually required quality documents; Zhejiang Department of Housing and Urban-Rural Development: On-site documentation for precast components includes first-article inspection records, factory certificates, concrete strength reports, rebar sleeve connection process inspection reports, production process inspection documents, concealed work acceptance records, and other contractually required quality documents); Material inspection (Yan’an People’s Congress/Wenzhou Department of Housing and Urban-Rural Development: Steel component manufacturers must provide steel re-test reports, weldability test reports, weld quality inspection reports, connector inspection reports, and mechanical connection records; Foshan Nanhai: Factory compliance certificates for raw rebar, inspection reports for raw rebar covering mechanical properties, process performance, weight deviation, etc.; Changsha Department of Housing and Urban-Rural Development: Re-test reports for raw rebar, weld connection inspection reports, concrete strength reports (28-day standard curing and field-cured samples), and inspection/calibration/tensioning data for prestressing materials and equipment); Acceptance records (Heilongjiang Department of Housing and Urban-Rural Development: Steel structure completion acceptance requires quality compliance documents for raw materials and finished products, acceptance records for Chinese labeling and performance test reports, sub-division engineering acceptance records, inspection and acceptance records for concealed work items, records of on-site supervision, and inspection records for witnessed testing items); and 2026 trends regarding quality certificates for structural components (factory certificates/material inspection/process records).
Sources: Departments of Housing and Urban-Rural Development of Shanxi and Zhejiang;
Yan’an People’s Congress; Housing and Urban-Rural Development Bureaus of Wenzhou, Foshan (Nanhai District), and Changsha;
Department of Housing and Urban-Rural Development of Heilongjiang.