Helix construction 4
Determine the grade as you position the lowest level. For a grade of approximately 2.5% and a radius of 15 inches, I elevated each level 0.5" at each bolt (2.5" for each level). Once you've completed the first level, position all upper levels exactly 2.5" (or whatever height you've chosen) above the lower one
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- Category:
- Layout Construction
- Uploaded By:
- bryan9
- Date:
- Oct 5, 2006
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