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GB 50601-2010: Code for construction and quality acceptance for lightning protection engineering of structures
GB 50601-2010
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
UDC
P GB 50601-2010
Code for construction and quality acceptance for lightning
protection engineering of structures
ISSUED ON: JULY 15, 2010
IMPLEMENTED ON: FEBRUARY 01, 2011
Issued by: Ministry of Housing and Urban-Rural Development of PRC.
General Administration of Quality Supervision, Inspection and
Quarantine of PRC.
Table of Contents
Foreword ... 6
1 General provisions ... 8
2 Terms ... 9
3 Basic requirement ... 11
3.1 Quality management of construction site ... 11
3.2 Requirements of construction quality control ... 11
4 Subdivision work of earth-termination system ... 13
4.1 Installation of earth-termination system ... 13
4.2 Installation procedures of earth-termination system ... 15
5 Subdivision work of down-conductor system ... 16
5.1 Installation of down-conductor system ... 16
5.2 Installation procedures of down-conductor system ... 18
6 Subdivision work of air-termination system ... 19
6.1 Installation of air-termination system ... 19
6.2 Installation procedures of air-termination system ... 20
7 Subdivision work of equipotential bonding ... 21
7.1 Installation of equipotential bonding ... 21
7.2 Installation procedures of equipotential bonding ... 22
8 Subdivision work of shielding ... 23
8.1 Installation of shielding device ... 23
8.2 Installation procedures of shielding device ... 23
9 Subdivision work of generic cabling ... 25
9.1 Installation of generic cabling ... 25
9.2 Installation procedures of generic cabling ... 26
10 Subdivision work of surge protective device ... 27
10.1 Installation of surge protective device ... 27
10.2 Installation procedures of surge protective device ... 29
11 Acceptance of engineering construction quality ... 30
11.1 General requirement ... 30
11.2 Inspection lot division and test requirements of subdivision works in lightning
protection engineering ... 31
Appendix A Record of quality management and test in construction site ... 36
Appendix B Material specifications for external lightning protection system and
equipotential bonding conductors ... 37
Appendix C Classification and information requirements for surge protective device
... 42
Appendix D Installation diagram ... 46
Appendix E Records of quality acceptance ... 61
Explanation of wording in this code ... 69
List of quoted standards ... 70
3 Basic requirement
3.1 Quality management of construction site
3.1.1 The quality management of lightning protection project construction sites shall
have corresponding construction technical standards, a sound quality management
system, a construction quality inspection system, a comprehensive construction quality
level judgment and assessment system. The chief supervisory engineer or the project
leader of the construction organization shall inspect and fill in Table A.0.1 of Appendix
A of this Code item by item.
3.1.2 Construction personnel, qualifications, measuring instruments shall meet the
following requirements:
1 All types of craftsmen and technical personnel, that are involved in construction,
shall have corresponding qualifications and hold certificates to work.
2 The construction organization shall have corresponding construction qualifications.
3 Various measuring instruments, which are used in installation and commissioning,
shall be certified by the statutory metrology certification agency AND shall be used
within the validity period of the certification.
3.2 Requirements of construction quality control
3.2.1 The mobilization inspection conclusions of the main equipment, materials,
finished products, semi-finished products, which are used in lightning protection
projects, shall be recorded. They shall be used in construction, after confirming that
they comply with the provisions of this Code. For mobilization acceptance of new
equipment, appliances, materials, which are approved to enter the market in accordance
with legal procedures, suppliers shall also provide technical documents, such as
installation, use, maintenance, testing requirements. For the mobilization acceptance of
imported equipment, appliances, materials, suppliers shall also provide commercial
inspection (or domestic testing agency) certificates and quality certification documents
in Chinese, specifications, models, performance inspection reports, as well as the
technical documents on the installation, use, maintenance, testing requirements in
Chinese.
Where there are objections to the main equipment, materials, finished products, semi-
finished products, which are used in lightning protection projects, sampling testing shall
be carried out, by the laboratory of the statutory testing agency; meanwhile a testing
report shall be issued.
4 Subdivision work of earth-termination system
4.1 Installation of earth-termination system
4.1.1 The dominant items shall comply with the following requirements:
1 For the natural earth electrode, that uses the steel bars in the pile foundation, beams,
columns of the building as the earth-termination system, AND the artificial earth
electrode specially buried for earthing needs, it shall provide connection plate
aboveground in accordance with requirements, which is used for measurement,
connection to the artificial earth electrode, equipotential bonding.
2 The earthing resistance value of the earth-termination system shall comply with
the requirements of the design document.
3 Within 3 m of the connection -- between the down-conductor and the earth
electrode, where people outside the building can pass or stay, it shall use one or
more methods to prevent step voltage from causing harm to personnel, as follows:
1) Lay a 5 cm thick asphalt layer or a 15 cm thick gravel layer, so that the ground
resistivity is not less than 50 kΩ·m.
2) Set up guardrails or warning signs, to prevent people from entering.
3) Lay the earth electrode into a horizontal grid.
4 When the engineering design document designates the earth-termination system of
first category of lightning protection building as independent earthing, the
separation distance -- BETWEEN the independent earth electrode and the building
foundation ground network AND the pipes, cables, other metal objects associated
with it -- shall comply with the provisions of Article 4.2.1 in the current national
standard "Design code for protection of structures against lightning" GB 50057-
2010.
4.1.2 General items shall comply with the following requirements:
1 When there is no requirement in the design, the burial depth of the top surface of
the earth-termination system shall not be less than 0.5 m. Earth electrode, such as
angle steel, steel pipes, copper rods, copper pipes, shall be arranged vertically. The
length of artificial vertical earth electrode should be 2.5 m; the spacing between
artificial vertical earth electrodes should not be less than 5 m. The horizontal
distance -- between the artificial earth electrode and the building's exterior wall or
foundation -- should not be less than 1 m.
2 The following methods can be used, to reduce the earthing resistance:
2) When the conductors are copper and copper or copper and steel, the connection
process shall be exothermic welding. The fusion joint shall completely enclose
the connected conductor in the joint. It shall ensure that the metal at the
connection part is completely melted AND the welding joint shall be
connected firmly. ...