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Planning and
Dimensional |
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Planning and
Dimensional |
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11 Ft. Diameter, Half Turn Series, Spiral Stair
| 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.