On Restoring Cantilever Stone Staircases in the Architecture of St. Petersburg. Part 2. How to Calculate a Straight Flight Staircase with Plane Treads

Purpose: To provide a comprehensive overview of the stone cantilever stairs. Materials and methods: A comprehensive archival investigation was undertaken. A thorough analysis and comparison of extant scientific and practical research in this field was conducted. Results: Adequate data has been collated for the purpose of conducting a structural analysis of extant structures. It is recommended that the experience of designing, building and operating the object of research be taken into account. Practical significance: The findings of this research will provide designing engineers with the calculation tools necessary to assess valuable historical objects.