Pine Spiral Staircase
Spiral stair kits from Precision Pine provide everything you need for free-standing, decorative, all-wood staircases that can be installed by two people who have a general knowledge of carpentry techniques and tools.
Stair parts are manufactured from selected pieces of your choice of wood: Southern Yellow Pine, Red Oak or other species. Parts are sanded to 80-grit smoothness and where possible pre-drilled for fasteners. Fasteners are hidden with wood buttons, plugs and caps. Final staining and varnishing is done by the customer.
Kits can be ordered to suit any floor-to-floor height. Six standard diameters are available: 6'-0"*, 5'-7"*, 5'-1"*, 5'-0", 4'-6", and 4'-0". (The diameters marked with an asterisk meet national building codes.) Stairs with custom diameters are also manufactured.
All parts required for the spiral stair installation are supplied in the kits, including the top landing and its horizontal rails. While national codes are fairly uniform, some local codes may have special requirements. Precision Pine will supply any additional parts required to meet these requirements at no extra cost.
Kits typically consist of a base plate and a pre-built bottom tread that fastens the spiral to the lower floor. Partially assembled pre-drilled treads and stiffeners are glued together at the start of installation to suit whether the handrail will be on the right or left as you climb the stairs. Final finishing of the stair parts can be done before installation or afterwards. However, if finish is applied before installation care should be taken not to contaminate the wood surfaces to be glued.
The kit provides separate riser blocks that are stacked with the treads to form a central column and a top center post that rises to a comfortable handrail height above the top floor. Before installation is complete the treads, riser blocks and top center post are tightened firmly together to form one solid unit with the treads embedded in the center column. The top landing is level with the top floor and fastens the spiral to it. Horizontal handrails protect the landing sides that are open to the stair below.
All kits are supplied with at least three 1-1/4" x 1-1/4" square balusters per tread, enough to reduce the space between balusters to less than 4". The top and bottom spiral handrail (newel) posts are 3" x 3" square. Turned (decorative) balusters and newels are available on request.
Required hardware, graphic assembly instructions and expert technical assistance from the factory are included.