Winder stairs must have handrails to use the area and where the tread width is less than 6.5 inches probably 17 cm. Winder stairs are good for that area where less place and need to make axis. This is ...

Winder stairs work like hairpin turns: They get you up or down steep grades. That is the organizing principle behind the redesign of this late-19th century South End row house: Like a mountain ...