This standard specifies the terms and definitions, classification and labelling, requirements, test methods, inspection rules, and marking, packaging, transportation and storage of friction hinges for building windows and doors.
This standard is applicable to the outward top-hung window of buildings with opening distance of window leaf not greater than 300mm and the friction hinge for outward side-hung window with width of window leaf not greater than 570mm.
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 to this document.
GB/T 2828.1 Sampling Procedures for Inspection by Attributes C 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 29048 Operating Forces - Test Method - Windows
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
friction hinge
multi-bar device for connecting window frame and window leaf, supporting window leaf, realizing the rotation towards outdoor and being opened by translation
[GB/T 32223-2015, Definition 3.11]
3.2
designed friction
maximum static friction force to prevent outward side-hung window leaf from leaving its opening position
3.3
operating force
maximum values of locking force and releasing force of locking device and the opening force and closing force of operable leaf for windows and doors
