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GB/T 11716-2018 in English

GB/T 11716-2018 in English

VALID

Logs of small diameter

  • Issued on:2018-05-14
  • Implemented on:2018-12-01
  • File Format:PDF
  • Delivery:Via email within 1~3 business days
Price(USD): $80.00
$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
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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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