GB/T 11716-2018 in English
VALIDLogs of small diameter
- Issued on:2018-05-14
- Implemented on:2018-12-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$78.00
| Standard No: | GB/T 11716-2018 |
| Document status: | VALID |
| Title in English: | Logs of small diameter |
| Title in Chinese: | 小径原木 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2018-05-14 |
| Implemented on: | 2018-12-01 |
| Superseding: |
GB/T 11716-2009 Logs of small diameter
|
| ICS Classification: | 79.040-Wood, sawlogs and sawn timber |
| Chinese Classification: | B68-Stem wood and raw wood |
| Professional Classification: | GB-National Standard |
| Related Keywords: | small diameter logs
small diameter introduction gb/t small diameter log diameter small head small diameter log standard national standard |
| Related Topics: | GB/T 11716-
GB/T 11716 fid small caliber gb11716 particle size too small GB/T 11716-2018 GB/t+11716 Small particle size analyzer GBT11716 GB/T 11716-1999 GB/T 11716-2009 GB/T 11716-2018 Taiyuan Miss Group |
《GB/T 11716-2018小径原木》由TC41(全国木材标准化技术委员会)归口,TC41SC2(全国木材标准化技术委员会原木和锯材分会)执行,主管部门为国家林业和草原局。
Introduction
GB/T 11716—2018 Interpretation of Small Diameter Log Standard
National Standard of the People's Republic of China GB/T 11716—2018 Small Diameter Log is an important specification in the field of wood production and circulation, replacing the previous GB/T 11716—2009 version. This standard mainly revise the terms and definitions, requirements, measurement tools, sampling and determination methods, measurement methods, volume calculation and product marking of small diameter logs.
Background of Standard Formulation and Technological Evolution
The GB/T 11716 series of standards has been revised many times since its first release in 1989. The main purpose of this revision is to adapt to the progress of forestry production and wood processing technology, and to further standardize the quality requirements and measurement methods of small diameter logs. The new version has made important improvements in the following aspects:
- Modified normative references
- Added terms and definitions
- Optimized the requirements for gauge diameter
- Adjusted the allowable limits for heartwood decay and wormhole defects
- Improved the bending measurement method and allowable limits
- Added the requirements for measurement tools
Comparison of standard frameworks
| Chapter | GB/T 11716—2009 | GB/T 11716—2018 |
|---|---|---|
| Terms and Definitions | None | Added |
| Requirements for gauge diameter | Existence | Optimization |
| Allowable limit of defects | Existence | Adjustment |
Interpretation of technical requirements
According to Table 1, the specific provisions for the allowable limit of defects are as follows:
| Defect Name | Measurement Method | Allowable Limit | |
|---|---|---|---|
| Missed Sections | Number within the Length of the Whole Material | ≤1 | |
| Sapwood Decay | Ratio of decay depth to gauge diameter | ≤10% | |
| Heartwood decay | Ratio of decay diameter to gauge diameter | Small head | Not allowed |
| Big head | ≤15% | ||
| Worm holes | Number of holes within 1m of any material length | ≤6 | |
| Bend | Ratio of maximum arch height to the horizontal length of the inner bend | ≤5% | |
Implementation Suggestions
To ensure the effective implementation of the standard, it is recommended to:
- Strengthen the calibration and management of measurement tools
- Regularly train relevant personnel
- Establish a quality traceability system

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