Concrete Staircase Section Detail with 18-Step Configuration

This drawing depicts a detailed section view of a multi-level residential staircase system with a 180° turn configuration. The staircase features 18 steps with specific dimensions of 17 cm rise (height) and 30 cm tread (depth), as indicated by the notation ‘M(17 X 30)18’. The elevation indicates a landing height of +1.63 meters from the reference level. The staircase incorporates concrete construction with structural walls on either side supporting the stair flights. The section shows both the primary staircase and its landing configuration, with the upper flight turning 180° relative to the lower flight. Adjacent to the section view is a complementary floor plan of the staircase showing the step numbering (1-18) and the spatial arrangement. The staircase width measures approximately 100-120 cm based on the labeled dimensions. The design includes provisions for railings along the open sides of the staircase, essential for safety compliance. The structural integration with floor slabs is clearly detailed, showing how the staircase connects to the building’s primary structure at different levels.