Toronto Spiral Staircase Kit

Number of Treads

The Toronto Spiral Staircase kit is tough enough to hold up to the rigors of the outside elements due to its sturdy construction of hot galvanized steel, but chic and modern enough to make any interior room a great conversation design topic. The Toronto Spiral Staircase is recommended for high frequent use indoors or outdoors and can be easily installed in about a day using common household tools.

If you’re looking for a staircase that looks great both outside and in, this is the spiral staircase for you! The Dolle Toronto Spiral Staircase V3 (61 in. diameter) is made of heavy-duty, hot-dipped galvanized steel. This is the updated version of our popular Toronto staircase for outdoor or indoor use. This kit features the option to have a vertical adjustment of 96 in. to 111 in. finished floor to finished floor dimensions, so it can be assembled to fit almost any space. This sturdy steel staircase is ideal for interior or exterior use and features a perforated tread for extra traction and safety – even when wet. DIY installation that can be completed by 2 people in 1 ½ days with common household tools

  • Can be installed in either a clockwise or counter-clockwise direction
  • 4 Vertical balusters per tread with 4” spacing
  • Perforated plate treads ideal for safety and comfort.
  • Interior or exterior use
  • Full step by step assembly video available here
  • Optional balcony railing and landing banister kits available - call for details
Tread Material Galvanized Steel
Structure Material
Galvanized Steel
In-Fill Material
Vertical Galvanized Steel Balusters
Handrail Material PVC
Staircase Height
96 7/8” to 157 5/16”
# of Treads
11 to 16
Tread Rise
8 1/16” to 9 ¼”
Ceiling Opening Required
65" x 65”
Weight Capacity
896 lbs


Important: consult your local building inspector for any questions and specifics regarding compliance with the local building codes prior to purchase


Tread Options Chart

Tread Count

Standard 11






Floor to Floor Height

96 7/8” –

104 15/16” – 120 ¼”

113” –
129 ½”

121 1/16” – 138 ¾”

129 1/8” – 148 1/16”

137 3/16” – 157 5/16”

*Chart shows that more than one tread count is acceptable for some stair heights