1. Scope of application 2. Normative cited documents 3. Terms and definitions 4. Classification and labeling 4.1 Classification 4.2 Specifications 4.3 Labeling 5. Requirements 5.1 General requirements 5.2 Appearance quality and material indicators 5.3 Specifications and dimensional deviations 5.4 Physical and chemical properties 6. Test methods 6.1 Sampling and preparation of specimens 6.2 Experimental environment and condition adjustment 6.3 Appearance quality and material indicators 6.4 Specifications and dimensional deviations 6.5 Physical and mechanical properties 6.6 Environmental performance 6.7 Anti-corrosion performance 6.8 Tree species name identification 7. Inspection rules 7.1 Inspection classification 7.2 Sampling method and judgment Rules 7.3 Comprehensive judgment 8. Marking, packaging, transportation and storage 8.1 Marking 8.2 Packaging 8.3 Transportation and storage