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LY/T 1157-2018: Purlin log
Status: Valid LY/T 1157: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| LY/T 1157-2018 | English | 149 |
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3 days [Need to translate]
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Purlin log
| Valid |
LY/T 1157-2018
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| LY/T 1157-2008 | English | 279 |
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3 days [Need to translate]
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Purlin log
| Obsolete |
LY/T 1157-2008
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| LY/T 1157-1994 | English | 199 |
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2 days [Need to translate]
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(Timber purlins)
| Obsolete |
LY/T 1157-1994
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PDF similar to LY/T 1157-2018
Basic data | Standard ID | LY/T 1157-2018 (LY/T1157-2018) | | Description (Translated English) | Purlin log | | Sector / Industry | Forestry Industry Standard (Recommended) | | Classification of Chinese Standard | B68 | | Word Count Estimation | 4,498 | | Date of Issue | 2018-12-29 | | Date of Implementation | 2019-05-01 | | Older Standard (superseded by this standard) | LY/T 1157-2008 | | Regulation (derived from) | National Forestry and Grassland Bureau Announcement No.18 of 2018 | | Issuing agency(ies) | State Forestry Administration | LY/T 1157-2008: Purlin log---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Purlin log
ICS 79.040
B68
People's Republic of China Forestry Industry Standard
Replacing LY/T 1157-1994
Coffin
Released on.2008-09-03
2008-12-01 implementation
State Forestry Administration released
Foreword
This standard is a revision of LY/T 1157-1994 "Coffin".
The main modifications and additions to the original standard in this standard are.
---The length of the gauge. change 4m ~ 5m to 3m ~ 6m;
---Check diameter. the original standard Chinese fir 10cm ~ 18cm, other tree species 12cm ~ 20cm unified to 8cm ~ 16cm;
--- Checking the diameter of the level. less than 14cm in 2cm level, instead of 1cm leveling;
--- Modified the material indicators such as heart decay and bending;
--- Increased the coffin volume table.
Appendix A of this standard is a normative appendix.
This standard was proposed by the State Forestry Administration.
This standard is under the jurisdiction of the China Timber Standardization Technical Committee.
This standard is interpreted by the China Timber Standardization Technical Committee.
This standard was drafted. Baishishan Forestry Bureau of Jilin Province.
The main drafters of this standard. Su Zhaofeng, Wu Jun, Xie Qunsheng, Hu Bingtao, Liu Lanhua, Wang Cheng, Zhangu Kui, Shan Hongyou, Yang Zhongdong, Zhang Chunlan,
Wang Jingchang.
The previous versions of the standards replaced by this standard are.
---LY 123-1965;
---GB 142-1984;
---LY/T 1157-1994.
Coffin
1 Scope
This standard specifies the tree species, size, material index and volume calculation of the coffin.
This standard applies to the roof structure of the residential building directly using logs.
2 Normative references
The terms in the following documents become the terms of this standard by reference to this standard. All dated references, followed by all
Modifications (not including errata content) or revisions do not apply to this standard, however, parties to agreements based on this standard are encouraged to study
Is it possible to use the latest version of these files? For undated references, the latest edition applies to this standard.
GB/T 144 log inspection
GB 4814 original wood product table
GB/T 17659.1 Sawmills for batch inspection and sampling - Part 1 . s
LY/T 1511 Log Product Marking
3 requirements
3.1 Tree species
Conifers, poplars and all hard broadleaf species.
3.2 size
3.2.1 Length of gauge. 3m~6m, graded by 0.2m; long grade tolerance. +6-2cm.
3.2.2 Inspection diameter. 8cm ~ 16cm. If the gauge diameter is less than 14cm, it will be upgraded by 1cm. When the actual size is less than 1cm, the foot is 0.5cm.
Increase, less than 0.5cm to go; the ruler diameter from 14cm or more, according to 2cm upgrade, the actual size is less than 2cm, the foot 1cm increase, no
Go to 1cm.
3.3 Material Specifications
Material indicators are shown in Table 1.
Table 1 Material Specifications
Defect name check method limit
The missing section is not allowed in the entire length of the material.
The sapwood is not allowed to be allowed in the entire length of the material.
The heart of the decayed decay must not exceed the diameter of the gauge head, the head is 10%
No insects are allowed in the long range
bending
The gauge length is 3m~4.8m
The gauge length is 5m~6m
Maximum arch height must not exceed
5cm
7cm
The depth of trauma and partial dryness shall not exceed 10% of the diameter of the gauge
Wind-breaking wood and cracking are not allowed in the entire length of the timber
Note. Defects not listed in the above table are not counted.
4 Inspection methods
4.1 Size inspection, material evaluation
According to the relevant provisions of GB/T 144.
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