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Planning and
Dimensional |
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Planning and
Dimensional |
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8 Ft. - 6 In. Diameter, Half Turn Series, Spiral Stair
| Stock Number: | USS86-24-HT |
| Stair Diameter: | 8' - 6" (259.08cm) |
| Minimum Opening: | 53" x 105" (134.62cm x 266.7cm) |
| Outside Radius: | 51" (129.54cm) |
| Inside Radius: | 12" (30.48cm) - Opt. 10" (25.4cm) |
| Stringer Width, Outer: | 11 - 1/4" (28.58cm) |
| Stringer Width, Inner: | 5 - 3/4" (14.61cm) |
| Stringer Thickness: | 1 - 1/2" (38.1mm) - Opt. 2" (50.8mm) |
| Tread Width at Outer Stringer: | 15" (38.lcm) |
| Tread Width at Inner Stringer: | 5" (12.7cm) |
| Tread Thickness: | 1 - 1/2" (38.mm) |
| Tread Passageway: | 36" (91.44cm) Opt. 35" (88.9cm.), 37" (93.98cm), 38" (96.52cm) |
| Handrail Width: | 3 - 1/2" (0.89cm) - Opt. 4 - 1/2" (11.43) or 5 - 1/2" (13.97cm) |
| Handrail Thickness: | 1 - 1/2" (38.1 mm) - Opt. 2" (50.8mm) |
| Baluster Spacing: | Approx. 6" (1 5.24cm), - Opt. 4" (10.16cm), or alternating 2", 3", 2" |
| Turn per Inch of Rise: | 1.816 Degrees |
| Rise per Degree of Turn: | 0.55" (13.97mm) |
| Floor to Floor | Risers | Degrees of Turn |
| 74' to 82' (187.96cm to 208.28cm) | 9 | 119 to 132 Degrees |
| >82" to 90" (208.28cm to 228.60cm) | 10 | 132 to 147 Degrees |
| >90" to 98" (228.60cm to 248.92cm) | 11 | 147 to 161 Degrees |
| >98" to 106" (248.92cm to 269.24crn) | 12 | 161 to 176 Degrees |
| >106" to 114" (269.24cm to 289.56cm) | 13 | 176 to 191 Degrees |
| >114" to 122" (289.56cm to 309.88cm) | 14 | 191 to 206 Degrees |
| >122" to 130" (309.88cm to 330.20cm) | 15 | 206 to 220 Degrees |
| Tread Capacity lbs. / kgs. |
728 / 390 | Stair Capacity lbs. / kgs. @ 114" Ht. |
2570 / 1166 |
Specifications for heights up to 190" (4.83m) are available upon request.