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StairDesigner
Pro is a polyvalent straight, helicoidal, and balanced stair design
software , used in the wood, marble, stone, and metal industries.It
allows a quick stairway parameters entry. Its Help and Control Function
checks the Riser Height, Tread Length, and Stair Rule parameters
(Blondel’s law), and helps reaching the stair compliance

http://rapidshare.com/files/4455221/...igner.exe.html