Inland navigation vessels - Stairs with inclination angles of 45° to 60° - Requirements, types

This document specifies technical requirements and classification for staircases installed on inland waterway vessels, specifically designed for inclination angles ranging from 45 to 60 degrees. The scope of this publication addresses the structural design, dimensional parameters, and safety criteria necessary to ensure secure access in constrained marine environments where steeper verticality is often required. It outlines detailed provisions regarding the construction of steps, handrails, and supporting frameworks to withstand operational stresses typical in the inland navigation sector. The document serves as a foundational reference for manufacturers and designers involved in the construction or renovation of such vessels, focusing on the geometric and physical specifications that define acceptable stair configurations. By establishing clear guidelines for these specific inclinations, the text aims to harmonize safety standards across different regions operating inland watercraft. It provides a structured approach to evaluating the suitability of stairway installations, ensuring consistency in engineering practices without addressing broader regulatory compliance or performance assessments beyond the defined technical parameters.