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Stock Number:
USS66-12-3QT
Stair Diameter:
6' - 6"
(198.12cm)
Minimum Opening:
82" x 82" (205.74cm
x 205.74cm)
Outside Radius:
39"
(99.06cm)
Inside Radius:
6"
(15.24cm)
Stringer Width, Outer:
11 - 1/4"
(28.58cm)
Stringer Width, Inner:
5"
(12.7cm)
Stringer Thickness:
1 - 1/2"
(38.1 mm)
Tread Width at Outer Stringer:
14 - 1/2"
(36.20cm)
Tread Width at Inner Stringer:
4 - 3/4"
(12.07cm)
Tread Thickness:
1 - 1/2"
(38.1 mm)
Tread Passageway:
30"
(76.2cm)
Handrail Width:
3 - 1/2"
(8.89cm) - Opt. 4 - 1/2" (11.43) or 5 -1/2"
(13.97cm)
Handrail Thickness:
1 - 1/2"
(38.1 mm)
Baluster Spacing:
Approx. 6"
(15.24cm), - Opt. 4" (10.16cm), or alternating
2", 3", 2"
Turn per Inch of Rise:
2.857 Degrees
Rise per Degree of Turn:
0.35"
(8.89mm)
Floor to Floor
Risers
Degrees of Turn
74"
to 82" (187.96cm to 208.28cm)
9
188 to 208 Degrees
>82"
to 90" (208.28cm to 228.60cm)
10
208 to
231 Degrees
>90"
to 98" (228.60cm to 248.92cm)
11
231 to
255 Degrees
>96"
to 106" (248.92cm to 269.24cm)
12
255 to
278 Degrees
>106"
to 114" (269.24cm to 289.56cm)
13
278 to
301 Degrees
>114"
to 122" (289.56cm to 309.88cm)
14
301 to
324 Degrees
>122"
to 130" (309.88cm to 330.20cm)
15
324 to
347 Degrees
Tread Capacity lbs. / kgs.
717 / 325
Stair Capacity lbs. / kgs. @ 114" Ht.
1724 / 782
Specifications for heights up to 190" (4.83m) are available upon request.
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