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Planning and
Dimensional |
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Planning and
Dimensional |
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16 Ft. - 11 In. Diameter, Quarter Turn Series, Spiral Stair
| Stock Number: | USS1611-117-QT |
| Stair Diameter: | 16'- 11" (5.16mm) |
| Minimum Opening: | 104' x 111" (264.16cm x 281.94cm) |
| Outside Radius: | 101 - 1/2" (257.81cm) |
| Inside Radius: | 58 - 1/2" (148.59cm) |
| Stringer Width, Outer: | 11 - 1/4" (28.58cm) |
| Stringer Width, Inner: | 10" (25.4cm) |
| Stringer Thickness: | 2" (50.8mm) - Opt. 2 - 1/2" (63.5mm) or 3" (76.2mm) |
| Tread Width at Outer Stringer: | 13 - 3/4" (34.93cm) |
| Tread Width at Inner Stringer: | 9" (22.86cm) |
| Tread Thickness: | 1 - 1/2" (38.1 mm) |
| Tread Passageway: | 39" (99.06cm) - Opt. 37" (93.98cm) or 38" (96.52cm) |
| Handrail Width: | 4 - 1/2" (11.43cm) - Opt. 5 - 1/2" (13.97cm) or 6 - 1/2" (16.51cm) |
| Handrail Thickness: | 2" (50.8mm) - Opt. 2 - 1/2" (63.5mm) or 3" (76.2mm) |
| Baluster Spacing: | Approx. 6" (15.24cm), - Opt. 4" (10.16cm), or alternating 2", 3", 2" |
| Turn per Inch of Rise: | 0.8824 Degrees |
| Rise per Degree of Turn: | 1.133" (28.78mm) |
Floor to Floor |
Risers | Degrees of Turn |
| 74" to 82" (187.96cm to 208.28cm) | 10 | 59 to 65 Degrees |
| >82" to 90" (208.28cm to 228.60cm) | 11 | 65 to 72 Degrees |
| >90" to 98" (228.60cm to 248-92cm) | 12 | 72 to 79 Degrees |
| >98" to 106" (248.92cm to 269.24cm) | 13 | 79 to 86 Degrees |
| >106" to 114" (269.24cm to 289.56cm) | 14 | 86 to 93 Degrees |
| >114" to 122" (289.56cm to 309.88cm) | 15 | 93 to 100 Degrees |
| Tread Capacity lbs. / kgs. |
1260 / 572 | Stair Capacity lbs. / kgs. @ 114" Ht. |
10,544 / 4786 |
Specifications for heights up to 190" (4.83m) are available upon request.