GB 50057-2010 PDF English
US$145.00 · In stock · Download in 9 secondsGB 50057-2010: Code for design protection of structures against lightning Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB 50057: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 50057-2010 | English | 145 |
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Code for design protection of structures against lightning
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Design code for protection of structures against lightning
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GB 50057-2010: Code for design protection of structures against lightning---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB50057-2010
NATIONAL STANDARD
OF THE PEOPLE'S REPUBLIC OF CHINA
Code for Design Protection of Structures
Against Lightning
Issued on: NOVEMBER 3, 2010
Implemented on: OCTOBER 1, 2011
Jointly Issued by Ministry of Housing and Urban-Rural Construction of the People's
Republic of China
General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China
Announcement of the Ministry of Housing and Urban-Rural
Development of the People's Republic of China
No. 824
Announcement on Publishing the National Standard of "Design Code for
Protection of Structures against Lightning"
"Design Code for Protection of Structures Against Lightning" has been approved as a national
standard with a serial number of GB 50057-2011 and will be implemented on October 1, 2011.
Therein, Articles (Items) 3.0.2, 3.0.3, 3.0.4, 4.1.1 , 4.1.2, 4.2.1(2,3), 4.2.3 (1, 2), 4.2.4 (8), 4.3.3, 4.3.5
(6), 4.3 .8 (4, 5), 4.4.3, 4.5 .8 and 6.1.2 are compulsory ones, and must be enforced strictly. The former
"Design Code for Protection of Structures Against Lightning" GB 50057-94 (2000 edition) shall be
abolished simultaneously.
Authorized by the Standard Rating Research Institute of the Ministry of Housing and Urban-
Rural Development of the People's Republic of China, this code is published and distributed by China
Planning Press.
Ministry of Housing and Urban-Rural Development of the People's Republic of China
November 3, 2010
Foreword
In accordance with the requirements of "Notice on Printing and Publishing 'Development and
Revision Plan on Engineering Construction Standards and Codes (Batch 1) in 2005"' (Jian Biao Han
[2005] No. 84), this code is revised from "Design Code for Protection of Structures Against Lightning"
GB 50057-94 (2000 edition) by China IPPR International Engineering Corporation jointly with the
organizations concerned.
In the revision of this code, the code drafting group seek advices by internet and contacting with
the organizations and individuals concerned after completing the exposure draft hereof; and finally
finalize it upon review after completing the draft for examination on the base of the advice gained.
This code comprises 6 Ahapters and 9 Appendixes, and the main contents cover. general provisions,
terms, classification of structures to be protected against lightning, protection measures for structures
against lightning, lightning protection system, protection against LEMP, etc ..
The following contents are revised in this code.
1. Chapter "Terms" is added;
2. Measures of contact voltage protection and pace voltage protection are changed;
3. The requirements for external lightning protection system adopting different metal objects
are added;
4. The provisions for side stroke protection are modified;
5. The requirements for electrical system and electronic system selecting SPD are provided in
detail;
6. The annual mean density calculation Formula of lightning stroke to ground is simplified, and
the value of predicted lightning stroke times for judging lightning protection classification of structures
is adjusted;
7. More specific requirements are made for partial Items.
The provisions printed in bold type are compulsory ones and must be enforced strictly. The
Ministry of Housing and Urban-Rural Development is in charge of the administration of this code and
the explanation of the compulsory provisions; China Machinery Industry Federation is responsible for
routine management, and China IPPR International Engineering Corporation is responsible for the
explanation of specific technical contents. All relevant organizations are kindly requested to sum up
and accumulate your experiences in actual practices during the process of implementing this code.
The relevant opinions and advice on modification or supplement, whenever necessary, can be posted
or passed on to China IPPR International Engineering Corporation (Address. No.5, W. 3rd Ring Rd
North, Haidian District, Beijing 100089, China) for futhure reference.
Organization Units, Chief Development Organizations, Participating Development Organizations,
Chief Drafting Staffs and Chief Examiners of this code.
Organization Units. China Mechanical Industrial Exploration and Design Association
Chief Development Organization. China IPPR International Engineering Corporation
Table of Contents
General Provisions ... 1
2 Terms ... 2
3 Classification of Structures to Be Protected Against Lightning ... 7
4 Protection Measures for Structures Against Lightning ... 9
4.1 Basic Requirement ... 9
4.2 Protection Measures for First Class of Structures to be Protected Against Lightning ... 9
4.3 Protection Measures for Second Class of Structures to Be Protected Against Lightning ... 17
4.4 Protection Measures of Third Class of Structures to Be Protected Against Lightning ... 23
4. 5 Other Protection Measures Against Lightning ... 27
5 Lightning Protection Syste1n ... 30
5. 1 Materials for Lightning Protection System ...30
5.2 Air-termination System ... 31
5.3 Down-conductor System ... 34
5.4 Earth-termination System ...35
6 Protection Against LEMP (Lightning Electromagnetic Impulse) ...38
6.1 Basic Requirement ... 38
6.2 Lightning Pretection Zones and Protection Against LEMP ... 38
6.3 Requirements for Magnetic Shielding, Earthing and Equipotential Bonding ...40
6.4 Requirements for Installation and Selection of SPDS (Surge Protective Devices) ...48
Appendix A Expected Annual Number of Lightning Flash for Structures ... 51
Appendix B Structure Parts Suffered Easily by Lightening Stroke ... 54
Appendix C Conversion From Power Frequency Earthing Resistance to Earthing Resistance of
Earth-termination System ... 55
Appendix D Determination of Protected Volume of Air-termination System with Rolling Sphere
Method ... 57
Appendix E Values of Coefficient kc ... 67
Appendix F Lightning Current ... 69
Appendix G Calculation of Induced Voltages and Currents in Loops ... 71
Appendix H Cross-section of the Entering Cable Screen ... 73
Appendix J Surge Protective Device ... 75
Explanation of Wording in This Code ... 82
List of Quoted Standards ... 83
1 General Provisions
1.0.1 This code is Formulated in order to adopt lightning protection measures by adjusting measures
to local conditions for lightning protection design of structures (including construction), prevent or
reduce personal injury, cultural relics and property loss arising from lightning stroke of structures, as
well as damage or error operation of electrical and electronic systems triggerred by lightning
electromagnetic impulse, and thereby achieving safety and reliability, advanced technology, and
economy and rationality.
1.0.2 This code is applicable to the lightning protection design of newly-built, extended and rebuilt
structures.
1.0.3 For the purpose of the lightning protection design of structures, the type of lightning protection
system and its layout shall be researched in detail and determined based on earnestly investigating
geography, geology, soil, weather, environment conditions and lightning activity rules as well as
characteristics of protected objects.
1.0.4 In addition to this code, the lightning protection design of structures shall also comply with
those specified in the national current relevant standards of the state.
2 Terms
2.0.1 Lightning flash to earth
It refers to one or multiple discharges between thundercloud and ground (including overground
projection).
2.0.2 Lightning stroke
It refers to one discharge in lightning flash to earth.
2.0.3 Point of strike
It refers to that point struck by lighting flash on ground or its projection. One lighting flash may
have multiple points of strike.
2.0.4 Lightning current
It refers to the current flowing through the point of strike.
2.0.5 Lightning protection system (LPS)
It is used for reducing substantive damage and personal injury arising from lighting flash on
structures or structure surrounding, which consists of external lightning protection system and internal
lightning protection system.
2.0.6 External lightning protection system
It consists of air-termination system, down-conductor system and earth-termination system.
2.0.7 Internal lightning protection system
It consists of lightning equipotential bonding and spacing with external lightning protection
system.
2.0.8 Air-termination system
It consists of air-tennination pole, air-termination strip, air-termination line, air-termination net,
...
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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