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Interior and Exterior Wood Spiral Stairs


11 Ft. - 0 In. Diameter, Half Turn Series, Spiral Stair


Back to Product Specs

Stock Number:
USS11-42-HT
Stair Diameter:
11' - 0" (335.28)
Minimum Opening:
70" x 136" (177.8cm x 345.44cm)
Outside Radius:
66" (167.64cm)
Inside Radius:
21" (53.34
Stringer Width, Outer:
12 1/2" (31.75cm)
Stringer Width, Inner:
8" (20.32cm)
Stringer Thickness:
2" (50.8mm)
Tread Width at Outer Stringer:
16 5/8 " (42.22cm)
Tread Width at Inner Stringer:
6 7/8" (17.46cm)
Tread Thickness:
1 - 1/2" (38.1mm)
Tread Passageway:
41" (104.14cm)
Handrail Width:
3 - 1/2" (8.89cm) - Opt. 4 - 1/2" (11.43) or 5 - 1/2" (13.97cm)
Handrail Thickness:
2" (50.8mm)
Baluster Spacing:
Approx. 6" (15.24cm), - Opt. 4" (10.16cm), or alternating 2", 3", 2"
Turn per Inch of Rise:
1.9 Degrees
Rise per Degree of Turn:
0.52" (1.32cm)

Floor to Floor
Risers
Degrees of Turn
74" to 82" (187.96cm to 208.28cm)
9
127 to 140 Degrees
>82" to 90" (208.28cm to 228.60cm)
10
140 to 155 Degrees
>90" to 98" (228.60cm to 248.92cm)
11
155 to 171 Degrees
>98" to 106" (248.92cm to 269.24crn)
12
171 to 186 Degrees
>106" to 114" (269.24cm to 289.56cm)
13
186 to 201 Degrees
>114" to 122" (289.56cm to 309.88cm)
14
201 to 216 Degrees
>122" to 130" (309.88cm to 330.20cm)
15
216 to 232 Degrees

Tread Capacity lbs. / kgs.
528 / 238
Stair Capacity lbs. / kgs. @ 114" Ht.
6043 / 2741

Specifications for heights up to 190" (4.83m) are available upon request.






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