Concept and design
Choosing a Space-Saving Staircase Design - What is Legal and What Isn't?
...Guardrail height: A guardrail (or balustrade) is required on any open side of a stair or landing where there is a vertical drop of 30 inches (76.2 cm) or more. The minimum height for a guardrail is generally 36 inches (91.4 cm) for residential homes.
Spacing of balusters: The vertical spindles or balusters in a guardra...
