1. Convert all to inches.
There are two ways to figure # of feet.
A) Radius (R) + (Width of Mould) x (3.14) = (# of inches) ÷ (by
12 in.) then round up to the nearest foot.
B) Diameter (D) + (2 x Width of Mould) x (3.14) ÷ (2) ÷ (12
in.) then round up to nearest foot.
1. Convert all to inches
2. (The Span) + (2 x Width of Mould) + (2 x Rise) ÷ (12 in.) then
round up to nearest foot.
ELLIPTICAL ARCH & OVAL
1. Is it going to the inside of a circle (I.S.D.) or to the outside of
the circle (O.S.D.)
2. Make sure the crown is being mounted correctly (top & bottom)
Radius Formula From A Segment Of A Circle
(1/2 The Span) x (1/2 The Span) ÷ (The Rise) + (The Rise) ÷ (2)