Sources

Sources and reference standards

Market prices come from current local quotes; regulatory and technical context uses authoritative sources where possible.

U.S. Access Board — Accessible Routes

U.S. Access Board — Accessible Routes. U.S. accessibility context for routes near entrances and canopies.

U.S. Access Board — Entrances, Doors and Gates

U.S. Access Board — Entrances, Doors and Gates. Entrance and accessibility context.

OSHA — Walking-Working Surfaces

OSHA — Walking-Working Surfaces. U.S. workplace surface-safety context around commercial exterior areas.

Local requirements

Accessibility, building, fire, workplace, planning and construction requirements vary by jurisdiction. The authority having jurisdiction and project team control the actual project.