A spiral staircase

A study of a spiral staircase with wedge-shaped steps around a central pole and a curved handrail on textured paper. Mark the central vertical column and the circular footprint.

A way into the drawing

1. Establish the construction

   Mark the central vertical column and the circular footprint.

2. Resolve the main structure

   Step wedge-shaped treads upward around the column at regular heights.

3. Develop the detail

   Connect their outer edges with balusters and a continuous rising handrail.

4. Control the values

   Shade tread undersides and distant parts to clarify the spiral depth.

A small thing to tryKeep the handrail rising with the tread sequence rather than forming flat rings.