Claims
- 1. The method of fabricating a wooden circular stair having a free-standing hollow central support column assembled of a plurality of full-length staves of rectilinear cross-section glued together and a plurality of radial tread supports mortised to the column at right angles to its axis which comprises mounting the assembled column in a lathe, turning it to circular cross-section, sanding it, and drilling or routing radial mortises for the support tenons diametrically through the column using first either a router or a drill press carried by a track mounted clear of the column parallel to the lathe axis, the location of the mortises longitudinally along the axis and radially around the circumference of the column being determined by a Computer Assisted Design or CAD technique using the parameters of the specific installation for which the staircase is intended.
- 2. The method of claim 1 including determining for axial spacing according to the rise interval appropriate for the installation and the angular spacing according to the number of supports for the installation.
- 3. The method of claim 2 further comprising marking the axial intervals for positioning the mortises on a strip affixed to the track, and marking the radial intervals for positioning the mortises on a "degree wheel" affixed at right angles to the axis and to one end of the column being routed.
Parent Case Info
This application is a continuation of my earlier-filed, copending application Ser. No. 795,545, filed Nov. 6, 1985, U.S. Pat. No. 4,655,017.
US Referenced Citations (2)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1455924 |
Nov 1976 |
GBX |
Continuations (1)
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Number |
Date |
Country |
Parent |
795545 |
Nov 1985 |
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