TY JOUR TI On Restoring Cantilever Stone Staircases in the Architecture of St. Petersburg. Part 2. How to Calculate a Straight Flight Staircase with Plane Treads KW Stone structures KW cantilever stairs KW hanging/cantilever stairs KW inspection KW reconstruction KW restoration KW verification calculations KW sample calculations JO Proceedings of Petersburg Transport University AU Weber, M.D. AU Kuznecov, A.V. PY 2025 IS 22 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"