LY/T 3228-2020 in English
VALIDPreservative pressure-treated glulam
- Issued on:2020-12-29
- Implemented on:2021-06-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$175.00
| Standard No: | LY/T 3228-2020 |
| Document status: | VALID |
| Title in English: | Preservative pressure-treated glulam |
| Title in Chinese: | 加压防腐处理胶合木 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2020-12-29 |
| Implemented on: | 2021-06-01 |
| Professional Classification: | LY-Forestry |
| Related Keywords: | preservative pressure-treated glulam introduction analysis
standard technical elements c1 requirements c4.1 requirements detection differences penetration rate sapwood penetration rate heartwood penetration depth≥10mm acq loading preservative type |
| Related Topics: | Anti-corrosion
Pressurize Anti-corrosion standard pressurized english Glue preservative Rot + wood preservative treatment Sample processing How to add preservatives Artificial preservative wood Preservative treatment methods for marine wood Anticorrosive wood acceptance |
Introduction
Analysis of the core content of the standard
| Technical elements | C1 requirements | C4.1 requirements | Detection differences |
|---|---|---|---|
| Penetration rate | ≥85% (sapwood only) | ≥90% (sapwood + heartwood) | Heartwood penetration depth≥10mm |
| ACQ loading (kg/m³) | 2.8-4.0 | 6.4 | Difference in moisture content between north and south |
Detailed explanation of key technical requirements
Special attention should be paid to the definition of exposed sapwood: In the length direction or cross section, glulam must have two adjacent faces exposed to the air at the same time. This standard innovatively limits the proportion of ply heartwood area to less than 20% (when the depth is ≤50% of the end size).
Comparison of anticorrosion treatment processes
Take quaternary ammonium copper (ACQ) treatment as an example: C3.2 outdoor unprotected scene requires a drug loading of 4.0kg/m³, a sapwood penetration rate of 90%, and the following requirements:
- Heartwood penetration ≥5mm when thickness ≤35mm
- Heartwood penetration ≥8mm when thickness>35mm
Implementation suggestions
1. Raw material control: The moisture content difference of the laminate must be strictly controlled within 5%. It is recommended to use an infrared moisture meter for online detection
2. Inspection optimization: For C4.1 products, it is recommended to increase the drilling sampling density to 3 inspection points per cubic meter
3. Labeling management: The preservative type, usage classification and treatment date should be marked in accordance with the requirements of LY/T 1925
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