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JG/T 231-2018 (JG/T231-2018)

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JG/T 231-2018: PDF in English (JGT 231-2018)
JG/T 231-2018
CONSTRUCTION INDUSTRY INDUSTRIAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 91.060.20
P 32
Replacing JG/T 231-2007
Technical requirements of building glass skylight
system
ISSUED ON: JUNE 26, 2018
IMPLEMENTED ON: DECEMBER 01, 2018
Issued by: Ministry of Housing and Urban-Rural Development of the
People's Republic of China
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions ... 8 
Annex A (informative) Detection limit of different matrix specimens ... 33 
Annex B (informative) Chromatogram of organochlorine pesticide mixed
standard solution ... 33 
Annex C (informative) Method uncertainty ... 36 
Bibliography ... Error! Bookmark not defined. 
Technical requirements of building glass skylight
system
1 Scope
This Standard specifies the terms and definitions, classification and marks,
general requirements, materials and components, production and assembly
requirements, requirements and test methods.
This Standard is applicable to building glass skylight system.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
GB/T 2680, Determination of light transmittance, solar direct transmittance,
total solar energy transmittance and ultraviolet transmittance for glass in
building and related glazing factors
GB/T 4171, Atmospheric corrosion resisting structural steel
GB/T 5117, Covered electrodes for manual metal arc welding of non-alloy
and fine grain steels
GB/T 5118, Covered electrodes for manual metal arc welding of creep-
resisting steels
GB/T 5224, Steel strand for prestressed concrete
GB/T 5237 (all parts), Wrought aluminium alloy extruded profiles for
architecture
GB/T 8485, The graduation and test for airborne sound insulating properties
of windows and doors
GB 8624, Classification for burning behavior of building materials and
products
GB/T 9535, Crystalline silicon terrestrial photovoltaic (PV) modules-design
qualification and type approval
GB/T 9944, Stainless steel wire ropes
GB/T 11944, Insulating glass unit
GB/T 11976, Graduation and test method of daylighting properties for
external windows
GB/T 13912, Metallic Coatings - Hot Dip Galvanized Coatings on Fabricated
Iron
GB/T 14370, Anchorage, grip and coupler for prestressing tendons
GB 15763.3-2009, Safety glazing materials in building - Part 3: Laminated
glass
GB 15763.4, Safety glazing materials in building - Part 4: Heat soaked
thermally tempered glass
GB/T 18911, Thin-film terrestrial photovoltaic (PV) modules - Design
qualification and type approval
GB/T 20047.1, Photovoltaic (PV) module safety qualification - Part 1:
Requirements for construction
GB/T 20878, Stainless and heat-resisting steels - Designation and chemical
composition
GB/T 20492, Zinc-5%aluminum-mixed mischmetal alloy-coated steel wire
and steel wire strand
GB/T 23615.1, Thermal barrier materials for architecture aluminium alloy
extruded profiles - Part 1: Polyamide profiles
GB/T 23615.2, Thermal barrier materials for architectural aluminum alloy
profiles - Part 2: Thermal barrier polyurethane
GB/T 24498, Gaskets for doors, windows and curtain walls of buildings
GB/T 25821, Stainless steel wire strand
GB/T 29043, Graduation and test method for thermal insulating properties of
curtain walls
GB/T 29551, Laminated solar PV glazing materials in building
GB/T 29738, Graduations and test method for performance of exterior
windows and doors, curtain walls impacted by windborne debris in windstorm
JG/T 449, Polyvinyl butyral(PVB) interlayer for building mounted photovoltaic
module
JG/T 455, Tempered Glass for Window, Door and Curtain Wall in Buildings
JG/T 471, Elastic sealants for insulating glass units of windows and curtain
walls in building
JG/T 475, Structural Silicon Sealants for Building Curtain Wall
JG/T 492, General Technical Requirements for PV Member Used for
Buildings
JGJ 16, Code for electrical design of civil buildings
JGJ 26, Design Standard for Energy Efficiency of Residential Buildings in
Severe Cold and Cold Zones
JGJ 75, Design standard for energy efficiency of residential buildings in hot
summer and warm winter zone
JGJ 85, Technical specification for application of anchor, grip and coupler
JGJ 113, Technical specification for application of architectural glass
JGJ 134, Design Standard for Energy Efficiency of Residential Buildings in
Hot Summer and Cold Winter Zone
JGJ/T 151, Calculation specification for thermal performance of windows,
doors and glass curtain-walls
JGJ 203, Technical code for application of solar photovoltaic system of civil
buildings
JGJ 255, Technical specification for skylight and metal roof
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 building glass skylight system
glass skylight system for short
A general term for envelope structure, decorative structure and canopy
composed of glass panel and support system with an angle of less than 75° to
the horizontal plane.
4.2.2 Marking example
Example: CGD-S-K-FB/3.5-JG/T231, which represents a closed glass skylight
system that is supported by cable rod structure, is openable, the structural
performance is 3.5kPa and complies with the industrial standard JG/T 231.
5 General requirements
5.1 The materials used for glass skylight system shall meet the relevant
regulations of the current national standards, see Annex A. There shall be exit-
factory certificate and quality certificate.
5.2 The physical and mechanical properties of the materials used for glass
skylight system shall meet the design requirements. The materials selected in
severe cold and cold areas shall meet the requirements of preventing low
temperature brittleness.
5.3 The area of glass panel used for glass skylight system shall not exceed
2.5m2. The length of the long side shall not be greater than 2m.
5.4 When the glass skylight system uses glass beam support, the glass beam
shall use laminated glass and the laminated glass original sheet shall be
tempered or semi-tempered ultra-white flat glass. The glass beam shall have a
good adaptability to temperature deformation, earthquake action and structural
deformation. After a piece of glass in laminated glass for glass beams is broken,
the glass beam shall still meet the structural performance design requirements.
The glass beam shall also meet the following requirements:
a) When the glass beam needs to be punched, the tempered laminated glass
shall be used;
b) When the glass beam does not need to be punched, the semi-tempered
laminated glass shall be used.
5.5 When the glass skylight system is installed with sunshade products, the
sunshade products shall comply with the requirements of JG/T 274.
5.6 The safety performance of the glass skylight system shall meet the design
requirements and shall be able to adapt to the deformation of the main structure
and the effects of temperature.
5.7 The energy-saving design of glass skylight system shall comply with the
requirements of GB 50176, GB 50189, JGJ 26, JGJ 75 and JGJ 134.
5.8 The durability of glass skylight system, anti-condensation (frost, ice) and
hail resistance shall meet the design requirements.
steel surface and the inside of closed profiles without end closures. Closed
profiles shall be end-sealed;
c) When using fluorocarbon paint or polyurethane paint to spray, the coating
film thickness shall not be less than 35μm. In areas with poor environment
such as seashore, the coating film thickness shall not be less than 45μm.
6.2.3 Stainless steel for glass skylight system shall use austenitic stainless steel.
The chemical composition shall comply with the requirements of GB/T 20878
and the nickel content shall not be less than 8%. Stainless steel shall meet the
requirements of current national standards, see Annex A.
6.2.4 Atmospheric corrosion resisting structural steel shall comply with the
requirements of GB/T 4171.
6.2.5 The welding material shall match the properties of the metal being welded.
The electrode used shall meet the requirements of GB/T 5117 and GB/T 5118.
Welding shall meet the requirements of GB 50661.
6.2.6 Main stress members and connectors shall use steel plates with a wall
thickness of not less than 4mm, hot-rolled steel pipes with a wall thickness of
not less than 2.5mm, and angle steel with a size of not less than L45mm × 4mm
and L56mm × 36mm × 4mm as well as cold-formed thin-walled steel with a wall
thickness of not less than 2mm.
6.2.7 Steel cable pressure pipe joints for glass skylight system shall meet the
requirements of JG/T 201. Other steel accessories used with glass skylight
system shall meet the design requirements.
6.3 Pull rod
6.3.1 Steel ropes for glass skylight system shall use steel strands. The nominal
diameter of the steel strand of the main load steel rope shall not be less than
12mm and shall meet the design requirements.
6.3.2 Zinc-5% aluminum-mixed rare earth alloy coated steel strands shall meet
the requirements of GB/T 20492. Other steel strands shall meet the
requirements of GB/T 5224. Stainless steel strands shall meet the requirements
of GB/T 25821 and JG/T 200.
6.3.3 Stainless steel wire ropes shall meet the requirements of GB/T 9944.
6.3.4 The finished cable shall have a chemical composition report and a product
quality certificate. When using non-standard cable, there shall be a qualification
report of its ultimate tensile test.
6.3.5 Anchors for cables shall comply with GB/T 14370 and JGJ 85.
6.5 Hardware
6.5.1 The hardware for glass skylight system shall comply with the relevant
national standards. See Annex A for common material standards.
6.5.2 In addition to stainless steel, hardware for glass skylight system shall be
anti-corrosive.
6.5.3 The bearing capacity and service life of the hardware shall meet the
design requirements. Check the bearing capacity of main stressed hardware.
6.6 Sealing material
6.6.1 Seam sealant for glass skylight system shall use neutral silicone
construction sealant that complies with JC/T 882 and the Displacement
capacity shall meet the deformation requirements of engineering seam. The
sealant shall be compatible with panel material. When it is not compatible with
laminated glass film, it shall take measures to avoid contact.
6.6.2 When the glass skylight system uses hidden frame installation, the
secondary sealant of insulating glass as well as adhesive for glass and profile
bonding shall use neutral silicone structure sealant that complies with JG/T 475.
6.6.3 Before silicone construction sealant and silicone structure sealant are
used, compatibility test of organic materials in contact with them and peel
adhesion test of materials bonded to them shall be performed by a nationally
recognized testing agency. In addition, it shall confirm the Shore hardness of
silicone structural sealant, the tensile adhesion under standard conditions.
Products that fail the tests shall not be used.
6.6.4 Sealing strips for glass skylight system shall comply with GB/T 24498.
Rubber products shall meet the requirements of HG/T 3099. When using rubber
products, silicone rubber, EPDM or neoprene shall be used.
6.7 Photovoltaic components
6.7.1 Solar photovoltaic components for glass skylight system shall meet the
requirements of JG/T 492. Photovoltaic laminated glass shall meet the
requirements of GB/T 29551. Photovoltaic insulating glass shall meet the
requirements of GB/T 29759.
6.7.2 Thin film photovoltaic components shall meet the requirements of GB/T
18911.
6.7.3 Crystalline silicon photovoltaic components shall meet the requirements
of GB/T 9535.
6.7.4 Other forms of photovoltaic components shall meet the requirements of
The insulation performance testing of glass skylight system shall be performed
in accordance with GB/T 29043. When testing, the test piece shall be installed
at the actual angle. The insulation performance can also be calculated
according to the method specified by JGJ/T 151.
9.5 Heat-shielding performance
The solar heat gain coefficient of glass skylight system shall be calculated
according to JGJ/T 151.
9.6 Photothermal performance
9.6.1 The measurement of visible light transmittance shall be performed
in accordance with GB/T 2680. Visible light transmittance of glass skylight
system can be calculated according to JGJ/T 151.
9.6.2 Light-to-heat ratio LSG is the ratio of the visible light transmittance
to the total solar transmittance g, that is, .
9.7 Thermal cycling performance
Thermal cycling performance of glass skylight system can be implemented
according to JG/T 397. When testing, the test piece shall be installed at the
actual angle.
9.8 Sound insulation performance
Sound insulation performance of glass skylight system can be implemented
according to GB/T 8485.
9.9 Lighting performance
Lighting performance testing can be performed in accordance with GB/T 11976.
9.10 Impact resistance performance
9.10.1 Resistance to soft heavy objects
The testing of the impact resistance of glass skylight system to soft heavy
objects shall be performed in accordance with Annex C.
9.10.2 Resistance to hard heavy objects
The testing of the impact resistance of glass skylight system to hard heavy
objects shall be performed in accordance with 7.11 in GB 15763.3-2009. Use
the upside of 1040g steel ball impact laminated glass, laminated insulating
Annex A
(informative)
Common material standards
GB/T 699-2015, Quality carbon structural steels
GB/T 700-2006, Carbon structural steels
GB/T 912-2008, Hot-rolled sheets and strips of carbon structural steels and high
strength low alloy structural steels
GB/T 1220-2007, Stainless steel bars
GB/T 1591-2008, High Strength Low Alloy Structural Steels
GB/T 2100-2017, Corrosion-resistant steel castings for general applications
GB/T 2518-2008, Continuously hot-dip zinc-coated steel sheet and strip
GB/T 3077-2015, Alloy structure steels
GB/T 3098 (all parts), Mechanical Properties of Fasteners
GB/T 3190-2008, Wrought aluminium and aluminium alloy - Chemical
composition
GB/T 3274-2007, Hot-rolled plates and strips of carbon structural steels and
high strength low alloy structural steels
GB/T 3280-2015, Cold rolled stainless steel plate, sheet and strip
GB/T 3524-2015, Hot-rolled carbon and low alloy structural steel strips
GB/T 4226-2009, Cold finished stainless-steel bar
GB/T 4237-2015, Hot rolled stainless steel plate, sheet and strip
GB/T 4238-2015, Heat-resisting steel plate, sheet and strip
GB/T 5277-1985, Fasteners; Clearance holes for bolts and screws
GB/T 6967-2009, Martensitic stainless-steel castings for general engineering
application
GB/T 8162-2008, Seamless Steel Tubes for Structural Purposes
......
 
(Above excerpt was released on 2020-03-08, modified on 2021-06-07, translated/reviewed by: Wayne Zheng et al.)
Source: https://www.chinesestandard.net/PDF.aspx/JGT231-2018