Overview
ISO 19026:2015 is an international standard developed by the International Organization for Standardization (ISO) that addresses accessible design elements in public restrooms. Specifically, it defines the shape, colour, and arrangement of flushing buttons and call buttons installed on walls in lavatories, along with their positioning relative to paper dispensers. This standard is focused on seat-type lavatories in public restrooms used by an unspecified large number of people, with the goal of enhancing usability and accessibility, particularly for older persons and individuals with visual or other disabilities.
The standard aims to create a consistent, user-friendly environment by specifying clear design guidelines for buttons that are crucial for restroom operation and assistance requests. By standardizing these elements, ISO 19026:2015 helps reduce confusion and improve ease of use, supporting inclusive design principles in public facilities.
Key Topics
Shape and Tactile Recognition
- Flushing buttons must be round or oval, while call buttons should have distinctly different shapes such as quadrangle, rectangle, or triangle to enable easy differentiation by touch.
- Buttons should be sized for easy pressing by fingers, palms, or the tops of hands.
- Raised button surfaces facilitate recognition by persons with visual disabilities.
Colour and Contrast
- Flushing and call buttons must have distinctly different colours to be easily distinguishable.
- Traditionally, call buttons are coloured red to signify urgency for assistance.
- Both types of buttons must maintain strong colour contrast against surrounding wall colours to increase visibility, following principles outlined in ISO 21542:2011.
Arrangement and Installation
- Buttons and the paper dispenser must be grouped together on one side of the restroom wall for intuitive access.
- Flushing buttons should be installed above the paper dispenser.
- Call buttons are placed at the same height as flushing buttons but oriented toward the rear of the toilet seat.
- Placement must accommodate different user postures, including sitting, standing, or fallen positions.
- Additional call buttons or pull cords must be installed at accessible heights for emergency use.
- The standard includes precise dimensional guidance for spacing to ensure consistency and ergonomic usability.
Exclusions and Specific Cases
- Restrooms with large paper holders that prevent standard button placement are excluded.
- Type A toilets with lateral transfer configurations per ISO 21542 are outside the scope.
Applications
ISO 19026:2015 is essential for architects, restroom designers, facility managers, and manufacturers of restroom hardware focused on public and commercial buildings. Applications include:
- Public transport hubs such as airports, railway stations, and bus terminals where large numbers of diverse users require accessible restroom facilities.
- Healthcare and social service facilities that must comply with accessibility standards and provide safe, easy restroom access for patients and visitors.
- Hotels, shopping centers, and office complexes aiming to meet inclusive design requirements and improve the overall user experience.
- Government buildings and assembly halls requiring compliance with local and international accessibility codes.
- Manufacturers of flushing and call buttons can leverage the standard to design products optimized for universal accessibility and interoperability.
- Facility maintenance and refurbishment projects can use the standard to audit and upgrade restroom fittings for better accessibility compliance.
Related Standards
- ISO 21542:2011 – Building construction - Accessibility and usability of the built environment; provides foundational guidance on visual contrast and accessibility criteria referenced in ISO 19026.
- ISO/IEC Directives, Part 2 – Editorial rules, referenced for the preparation and maintenance of ISO documents.
- National standards on accessibility which may adopt or adapt ISO 19026 guidelines in local regulatory frameworks.
By adhering to ISO 19026:2015, organizations can create safer, more accessible public restroom environments that comply with global best practices in accessible design, enhancing usability and dignity for all users.