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This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces JG/T 128-2007 Building Hardware for Windows and Doors - Stay Arms and the following main technical changes have been made with respect to JG/T 128-2007:
——The term and definition of stay arm (see 3.1) is added, and the definitions of lockable stay arm (see 3.2), frictional stay arm (see 3.3) and retaining force (see 3.4) are modified;
——The chapter - “Classification and Labelling” is modified (see Chapter 4);
——The requirements (see 5.4.2.1) and test methods (see 6.4.2.1) for stay arm for inward side-hung window and outward top-hung window are modified;
——The mechanical performance requirements (see 5.4.2.2 and 5.4.3.3) and test methods (see 6.4.2 c and 6.4.3.3) for stay arm for inward bottom-hung window are added;
——The damage resistance requirement (see 5.4.3.1) and test method (see 6.4.3.1) for stay arm for inward side-hung window are modified;
——The specification and dimension requirements (see Table 1) for test simulated window of inward bottom-hung window are added.
This standard was proposed by the Research Institute of Standards and Norms (RISN) of Ministry of Housing and Urban-Rural Development.
This standard is under the jurisdiction of the Technical Committee on Standardization of Building Products and Accessories of the Ministry of Housing and Urban-Rural Development of the People's Republic of China.
The previous editions of this standard are as follows:
——JG/T 128-2000 and JG/T 128-2007.
Introduction
The standard series of Building Hardware for Windows and Doors consists of 12 standards:
——GB/T 32223 Building Hardware for Windows and Doors - General Requirements
——JG/T 124 Building Hardware for Windows and Doors - Handles for Espagnolette Gears
——JG/T 125 Building Hardware for Windows and Doors - Hinges
——JG/T 126 Building Hardware for Windows and Doors - Espagnolette Gears
——JG/T 127 Building Hardware for Windows and Doors - Friction Hinge
——JG/T 128 Building Hardware for Windows and Doors - Stay Arms
——JG/T 129 Building Hardware for Windows and Doors - Rollers
——JG/T 130 Building Hardware for Windows and Doors - Single Point Locking Gears
——JG/T 213 Building Hardware for Windows and Doors - Casement Fastener Handle
——JG/T 214 Building Hardware for Windows and Doors - Latch Bolts
——JG/T 215 Building Hardware for Windows and Doors - Multipoint Locking Gears
——JG/T 393 Building Hardware for Windows and Doors - Lever Handles and Knob Furniture
Building Hardware for Windows and Doors - Stay Arms
1 Scope
This standard specifies the terms and definitions, classification and labelling, requirements, test methods, inspection rules, and marking, packaging, transportation and storage of stay arms for building windows and doors.
This standard is applicable to stay arms for inward side-hung window, outward top-hung window and inward bottom-hung window in buildings.
2 Normative References
The following documents for the application of this document are essential. Any dated reference, just dated edition applies to this document. For undated references, the latest edition of the normative document (including any amendments) applies.
GB/T 2828.1 Sampling Procedures for Inspection by Attributes - Part 1: Sampling Schemes Indexed by Acceptance Quality Limit (AQL) for Lot-by-lot Inspection
GB/T 5823 Terminology for Building Windows and Doors
GB/T 14436 General Principles of Industrial Product Guarantee Documents
GB/T 32223 Building Hardware for Windows and Doors - General Requirements
3 Terms and Definitions
For the purposes of this document, the following terms and definitions given in GB/T 5823 and the following apply.
3.1
stay arm
device restricting the opening angle of operable leaf, which is also called as stopper and opening stopper
[GB/T 32223-2015, Definition 3.16]
3.2
lockable stay arm
stay arm to fix the opening angle of window leaf by mechanical blocking position
3.3
frictional stay arm
stay arm to restrict the opening angle of window leaf by frictional locking structure
3.4
retaining force
force preventing window leaf from disconnecting from locked position along opening or closing direction under external force action
4 Classification and Labelling
4.1 Classification and code
4.1.1 Product code
Product code: CD.
4.1.2 Classification by applicable window type
Product code is classified into three categories by opening form (see Figure 1) of applicable window type:
a) Code of stay arm for inward side-hung window: NP;
b) Code of stay arm for outward top-hung window: WX;
c) Code of stay arm for inward bottom-hung window: NX.
a) Stay Arm for Inward Side-hung Window b) Stay Arm for Outward Top-hung Window c) Stay Arm for Inward Bottom-hung Window
Keys:
1——Window leaf;
2——Stay arm parts on leaf;
3——Supporting parts of stay arm;
4——Stay arm parts on frame;
5——Window frame.
Figure 1 Schematic Diagram for Stay Arm
4.1.3 Classification by principle of generating retaining force
Product code is classified into three categories by principle of generating retaining force:
a) Code of lockable stay arm without adjustable function: WTSD;
b) Code of frictional stay arm with adjustable function: KTMC;
c) Code of frictional stay arm without adjustable function: WTMC.
4.1.4 Specification code
For the lockable stay arm for outward top-hung window, its specification code shall be represented by the actual minimum length of supporting parts (mm); and those of the rest of stay arms shall be represented by the actual maximum length of supporting parts (mm).
4.2 Labelling
4.2.1 Labelling method
4.2.2 Labeling example
Example 1:
As for the frictional stay arm with adjustable function for inward side-hung window with supporting parts whose maximum length is 200mm, it shall be labelled as: CD-NP KTMC 200 JG/T 128-2017.
Example 2:
As for the lockable stay arm without adjustable function for outward top-hung window with supporting parts whose minimum length is 200mm, it shall be labelled as: CD-WX WTSD 200 JG/T 128-2017.
Foreword I
Introduction II
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification and Labelling
5 Requirements
6 Test Methods
7 Inspection Rules
8 Marking, Packaging, Transportation and Storage
