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This structure is a modified version of the
Spiral
Staircase Kit #2. Here, the diameter of the central column area is 6
feet across and the stair treads are 4 feet wide. The cover canopy above is 16
feet in diameter and is supported by six 6x6 posts extending up from the central
column around which the stair wends. The central portion above the column
is 3 feet in diameter.
The cover canopy is to be one of a number of
fractal patterns shown below printed on the
underside of stiff translucent polycarbonate plastic panels.
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