ISO 18063-1:2016

Overview - ISO 18063-1:2016 (Rough‑terrain trucks - Visibility test methods - Part 1: Variable‑reach trucks)

ISO 18063-1:2016 specifies a static visibility test method for rough‑terrain variable‑reach trucks with a seated operator position on the left‑hand side or centre of the boom (right‑side operator positions are excluded). The standard defines how to determine and evaluate operator visibility around the truck by measuring maskings (shadows / blocked lines of sight) on:

• a rectangular 1 m boundary around the truck, and
• a 12 m radius visibility test circle divided into six sectors.

The document sets out test apparatus, measurement procedure, visibility performance criteria, reporting requirements and guidance for derivative trucks.

Key technical topics and requirements

• Scope & exclusions: Applies only to rough‑terrain variable‑reach trucks; excludes reach stackers, articulated telescopic wheel loaders, slewing trucks and lorry‑mounted trucks.
• Test locations: Visibility Test Circle (12 m radius, sectors A–F) and Rectangular 1 m Boundary (1 m from outside truck boundary).
• Test apparatus:
  • Light source apparatus - at least two light sources on a rotatable light bar with adjustable spacing; centre point located 680 mm above and 20 mm in front of the seat index point (SIP). Spacing options and movable ranges are specified to simulate eye positions.
  • Vertical test object - 1.5 m high, used for 1 m boundary checks.
  • Observation mirror - handheld mirror permitted to detect line‑of‑sight.
• Measurement procedure: Marking of test surface, truck configuration (boom retracted, forks positioned), light‑source positioning and systematic detection of maskings on the circle and boundary.
• Performance criteria: Maximum allowed maskings (visibility performance criteria) are specified per sector and for the rectangular boundary; direct and indirect visibility (mirrors/CCTV) are addressed.
• Reporting & verification: Test report content, drawings and computational/simulation methods for calculation of maskings are defined.

Practical applications - who uses ISO 18063-1

• Truck manufacturers / OEMs - design validation, reducing blind spots and meeting safety expectations.
• Test laboratories & certification bodies - conformity assessment and performance verification.
• Safety engineers & fleet operators - risk assessment, specifying required mirrors, cameras or design changes to improve operator visibility.
• Regulators and procurement teams - referencing objective visibility criteria in specifications and compliance checks.

Related standards and references

• Normative references in ISO 18063-1 include ISO 5053-1 (industrial truck terminology), ISO 5353 (seat index point) and ISO 12100 (machine safety / risk reduction).
• ISO 18063 is a multi‑part series; consult the ISO catalogue for other parts in the series.

Keywords: ISO 18063-1, rough‑terrain trucks, variable‑reach trucks, visibility test, 12 m visibility test circle, rectangular 1 m boundary, light source apparatus, operator visibility, masking, visibility performance criteria.