WTORS Tools for WAV Builders, Modifiers & Engineers
Estraints helps wheelchair accessible vehicle manufacturers, modifiers, installers, engineers and certifiers make WTORS geometry more repeatable and easier to document.
Use a consistent calculation workflow, retain reports with project records and train staff using a common standards-led framework.
Use the WTORS Calculator Discuss Organisation Use
Where Estraints fits into the WAV build process
Concept and design
Assess likely shoulder-belt geometry before finalising restraint structures, trim and mounting positions.
Prototype
Measure the actual vehicle and wheelchair position and assess candidate upper anchorage locations.
Engineering review
Use the generated report as supporting technical evidence within the project file, alongside structural, regulatory and manufacturer information.
Production
Create a repeatable process for common vehicle and wheelchair configurations.
Quality assurance
Retain calculation reports with job records and support staff with common WTORS guidance and training.
For vehicle modifiers and mobility installers
- Consider belt geometry before finishing trim or restraint structures
- Use a repeatable measurement process
- Reduce reliance on visual judgement alone
- Support internal QA and project records
- Train staff in the underlying WTORS principles
For engineers and certifiers
- Review the inputs used for the geometry assessment
- Review graphical outputs
- Retain a reproducible calculation record
- Separate restraint geometry from structural strength and regulatory approval
- Reference the applicable standards framework
Standards resources
Compare the major wheelchair transportation standards on the Wheelchair Transportation Standards Comparison page, or go directly to the Standards Hub.
Need repeat access across a team?
If your organisation generates multiple WTORS reports or needs training across a technical team, tell us what you need. We are validating organisation and volume-use requirements before investing in additional enterprise functionality.
Content status: Updated by the Estraints Technical Team on 24 September 2026. See how Estraints develops and reviews technical guidance.