A is for Accessibility – Spiral stairs and space saving stairs enable access where room is too small for traditional stairs.

B is for Baluster/Spindle – the vertical member, plain or decorative, that acts as the infill between the handrail and baserail.

C is for Continuous Handrail – using straight lengths of handrail connected to handrail fittings and ramps, the handrail flows over the tops of newel turnings creating a continuous run of handrail.
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