JG/T 231-2018 English PDF (JGT231-2018)
JG/T 231-2018 English PDF (JGT231-2018)
JG/T 231-2018: Technical requirements of building glass skylight system
CONSTRUCTION INDUSTRY INDUSTRIAL STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
Replacing JG/T 231-2007
Technical requirements of building glass skylight
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
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-
GB/T 5224, Steel strand for prestressed concrete
GB/T 5237 (all parts), Wrought aluminium alloy extruded profiles for
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
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
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
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 35??m. In areas with poor environment such as seashore, the coating film thickness shall not be less than 45??m. 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.
6.5.1 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
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
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