<P> Maximum Rise 220 mm (8.7 in) and Minimum Going 220 mm (8.7 in) remembering that the maximum pitch of private stairs is 42 ° . The normal relationship between dimensions of the rise and going is that twice the rise plus the going (2R + G) should be between 550 and 700 mm (21.7 and 27.6 in) </P> <P> Construction of steps--Steps should have level treads, they may have open risers but if so treads should overlap at least 16 mm (0.6 in). Domestic private stairs are likely to be used by children under 5 years old so the handrail ballister spacing should be constructed so that a 100 mm (3.9 in) diameter sphere cannot pass though the opening in the risers in order to prevent children from sticking their heads through them and potentially getting stuck . </P> <P> Headroom--A headroom of 2 m (78.7 in) is adequate . Special considerations can be made for loft conversions . </P> <P> Width of flights--No recommendations are given for stair widths . </P>

What advantage does the stairs have over ramps