|Forum topic by RookieAtThis||posted 07-20-2010 04:46 AM||19599 views||1 time favorited||8 replies|
07-20-2010 04:46 AM
I need your assistance in doing this:
I am in the midst of replacing a window that has a circular half moon at the top of a rectangular window. The installer asked me if I wanted a custom moulding trim piece made for the curved section to match the straight colonial trim that he was going to use. I researched this and the typical job is taking the knifes that were used to create the straight piece and use them on a piece of MDF. This would then create the 1 pieced trim for the curved window. That’s all fine and dandy but where would the fun be with that? I noticed that the current trim (made by the builder’s trade) is pieced together using just pieces of straight moulding. They then sanded this into a more please circular shape. I envisioned that this was the way trades people did these “odd” shapes on site.
Besiding templating the curved shape and using trial and error to calculate the the angles of the cut, does anyone know of a mathematical calculation (solution)?
For example, my current window diameter (without the 1/8 reveal on either side)) is 72 inches witha radius of 35.6 (close enough to be a circle). The tradeperson made the curved moulding by piecing 26 segments together. I figure it I doubled the pieces to make the curve even smoother.
I figure I can hand sand the piece smooth. I also has access to a press drill so I can sand the inner and outer edges smooth if necessary.
Splitting, laminating and bending pieces of the straight moulding is not an option for me.