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Formally titled "Industrial trucks — Safety requirements and verification — Part 4: Driverless industrial trucks and their systems," this standard is part of the ISO 3691 series. While other parts cover counterbalanced lift trucks, pedestrian-controlled trucks, and rough-terrain trucks, —vehicles that operate without an on-board driver.
ISO 3691-4 does not replace risk assessment; it references it. You must document: Iso 3691-4 Pdf
In the past, a human operator was the "safety valve"—they could stop a forklift if they saw a pedestrian. In an automated environment, the truck is the safety valve.
The document covers any powered industrial truck designed to move automatically without relying on fixed mechanical guidance rails. This explicitly embraces: and "bots" Searching for "ISO 3691-4 PDF free download" is
The standard shifts significant responsibility onto the end-user to design a safe workspace. It classifies floor space into distinct zones:
Integrators are responsible for the entire "system," which includes the environment. They must map out the operational zones, ensure adequate floor conditions, install proper signage, and configure the vehicle's safety fields according to the physical layout of the facility. For End-Users (Facility Owners) ISO 3691-4 does not replace risk assessment; it
The ISO 3691 series consists of multiple parts, each addressing a different category of industrial truck. Understanding the relationships between these parts is essential for anyone working in the field.
Once you have the official PDF, do not just read it cover-to-cover. Instead:
The standard explicitly requires that the user manual (provided as a PDF or printed) include:
| Requirement | Test Method | Acceptance Criterion | | :--- | :--- | :--- | | Obstacle detection | Move test object into protective field | Vehicle stops before contact | | Emergency stop | Activate E-stop at 100% speed | Stop distance within declared limit | | Lateral stability | Tilt table test (per ISO 22915-2) | No loss of stability |