Overview
ISO 21174:2026 - Doors, windows and curtain walling - Hardware for doors and windows - Vocabulary is an international standard developed by ISO. It provides a comprehensive glossary of terms relating to hardware used in windows and pedestrian doors, with a particular focus on the components involved in the connection, operation, and support of window sashes/casements and door leaves with their frames. This vocabulary standard is essential for manufacturers, designers, architects, and professionals in the construction industry to ensure a unified understanding and consistent communication worldwide regarding hardware terminology.
Key Topics
- Hardware Categories: The standard organizes terms into six main categories: generic hardware, operating elements, fastening elements, supporting elements, hold-open and controlling elements, and hardware specific to particular window and door systems.
- Operation and Connection Components: Definitions cover hardware that connects, operates, and secures windows and doors-including handles, locks, hinges, bolts, restrictors, and closers.
- Exclusions: ISO 21174:2026 does not include vocabulary for fixing elements (such as screws or bolts used to attach hardware to profiles or frames) or address hardware performance requirements and testing methods.
- Clarity and Consistency: The standard seeks to eliminate ambiguities by standardizing usage of terms across regions and industries, supporting clearer communication and technical documentation.
Applications
ISO 21174:2026 is widely applicable across the building and construction sector, particularly for:
- Product Specification: Manufacturers of doors, windows, and curtain walling use the standardized vocabulary in product documentation, catalogues, and technical manuals for clear identification and specification of hardware parts.
- Architectural Design and Planning: Architects and designers employ the terminology to accurately describe hardware requirements and features in drawings, plans, and building specifications, reducing the risk of confusion or miscommunication.
- Procurement and Tendering: Procurement teams and contractors reference the standardized terms to formulate precise requirements for hardware in contracts and tender documents.
- Installation and Maintenance: Installers, maintenance teams, and facility managers benefit from uniform terminology in manuals and guides, aiding correct installation and servicing of doors and windows.
- International Trade: The global construction supply chain relies on standardized vocabulary to ensure products sourced from different countries meet design intents and functional expectations.
Related Standards
For holistic understanding and enhanced application of window and door hardware, consider the following related ISO standards:
- ISO 16283 - Field measurement of sound insulation in buildings and of building elements
- ISO 10077 - Thermal performance of windows, doors, and shutters - Calculation methods
- ISO 9227 - Corrosion tests in artificial atmospheres
- ISO 9001 - Quality management systems (relevant for manufacturers)
- ISO/IEC Directives - Procedures for technical committee operations and document drafting
Adaptation of ISO 21174:2026 in conjunction with these related standards promotes best practices, quality assurance, and streamlined processes in the design, manufacturing, and specification of doors, windows, and curtain walling systems.
By standardizing hardware terminology, ISO 21174:2026 facilitates international collaboration, reduces inconsistencies, and supports efficient communication throughout the construction and building products industry, making it an indispensable reference for all stakeholders.