Step 1
More Info.
Choose Stair Diameter and Finished Opening size:
Diameter | Opening
3' 6" 44" x 44"
4' 0" 50" x 50"
4' 6" 56" x 56"
5' 0" 62" x 62"
5' 6" 68" x 68"
6' 0" 74" x 74"
6' 6" 80" x 80"
7' 0" 86" x 86"
Step 2
Chose stair height and number of Treads/Raisers:
Will Fit, 30 Degree Tread
93 ½" - 104 " (10 Treads 11 Risers)
102" - 114" (11 Treads 12 Risers)
110 ½" - 123 ½" (12 Treads 13 Risers)
119" - 133" (13 Treads 14 Risers )
128" - 142" (14 Treads 15 Risers)
136" - 152" (15 Treads 16 Risers)
145" - 161" (16 Treads 17 Risers)
