ISO 16840-10:2021

Overview

ISO 16840-10:2021 - “Wheelchair seating - Part 10: Resistance to ignition of postural support devices - Requirements and test method” specifies how to evaluate the resistance to ignition of integrated and non‑integrated wheelchair components that interface with the body (for example, seat cushions, back supports, pads, harnesses and other postural support devices). The standard uses a reproducible electronic heat source that simulates a smouldering cigarette and other environmental ignition hazards. Tests assess the ignition behaviour of assembled components (composite materials), not the complete wheelchair or individual raw materials.

Key technical topics and requirements

• Scope and exclusions
  • Applies to components intended to protect tissue integrity or provide posture support.
  • Does not cover structural parts, electrical/electronic fire risks, or guarantee ignitability of a complete wheelchair.
  • Does not address long‑term changes from regular use (although annexes discuss conditioning procedures).
• Test principle
  • Uses an electronic ignition source standardized to simulate smouldering cigarette heat output.
  • Separate procedures for items normally used in the horizontal plane (seat cushions) and vertical plane (back supports).
  • Allows testing of smaller postural support devices and assemblies of composite materials.
• Apparatus and environment
  • Defines test rig, enclosure, timer, heat source and conditioning/test environments.
  • Covers sample preparation and selection of surfaces at risk.
• Procedure and reporting
  • Detailed steps for horizontal and vertical tests, preparation, execution and measurement.
  • Requirements for test reports and disclosure of results.
• Annexes
  • Informative and normative annexes include heat‑source design, sample conditioning (washing/drying), and guidance on selecting surfaces for testing.

Practical applications and who uses this standard

• Manufacturers of wheelchair seating and postural supports - to design components with acceptable ignition resistance while minimizing harmful flame retardants.
• Testing laboratories - to perform standardized ignition tests and generate compliant test reports.
• Procurement teams and purchasers - to specify safe seating components for healthcare facilities and assistive‑product supply.
• Clinicians and rehabilitation engineers - to understand fire‑safety trade‑offs when selecting cushions and positioning devices for vulnerable users.
• Regulators and certification bodies - to evaluate compliance and inform product safety decisions.

Related standards and context

• Complements ISO 16840 series on wheelchair seating and ISO 7176 family (power/electrical safety).
• Encourages consideration of biocompatibility per ISO 10993‑1 and risk management per ISO 14971.
• Helps balance clinical needs, occupant safety, and reduced reliance on toxic flame retardants.

Keywords: ISO 16840-10:2021, wheelchair seating, resistance to ignition, postural support devices, test method, smouldering cigarette, flammability testing, seat cushion, back support.