This brings the spacing between balusters on each tread from 20 cm to 9.2 cm on the 120 diameter Calgary & Montréal, and from 23.5 cm to 10.5 cm on the 140 diameter. UK building regs. is no more than 10 cm gaps. There are 2 extra balusters for repos and 1 extra for each step (11 pcs.). A total of 13 balusters in the package. Distance between balusters: SPIRAL STAIR CALGARY & MONTRÉAL 120 cm: NO extra baluster: 20,5 cm – 19,7 cm One extra baluster: 9,2 cm – 10,8 cm SPIRAL STAIR CALGARY & MONTRÉAL 140 cm: NO extra baluster: 23,5 cm – 23,5 cm 1 extra baluster: 10,5 cm – 13,8 cm 2 extra balusters: 6,2 cm – 8,6 cm Riser bars are also available see below. Our riser bars are designed to fit horizontally between the treads of an open-tread staircase.
