Latest Discussions : Home Design

glendot

04:07AM | 12/02/04
Member Since: 06/26/04
30 lifetime posts
How do you lay out a variable radius archway?

theeagle

04:11PM | 12/03/04
Member Since: 11/27/04
172 lifetime posts
like not a half circle?

i have seen two nails put on the bottom outside of the curve, then you get a peice of one eigth or quarter inch lath and push it up in the center to the center of the top of arch required. and it gives a decent half circle shape.


bravey

09:13AM | 12/04/04
Member Since: 06/23/04
161 lifetime posts
What you are refering to is a semi-ellipse. There are several ways to create these. Probably the easiest is a mechanical method using a pencil, two nails, and a string. The nails are set on the horizontal axis of your wall or plywood, say 3 feet apart. The string is cut to four feet (plus a bit more to tie it off). Tie one end of the string to the first nail and the other end to the second nail. Now place the pencil against the string and pull it taught (like a bow and arrow except the pencil is perpendicular). While the string is always taught, draw a line letting the string drag around the pencil. This will give you an ellipse that is 48 inches by 32 inches (or a semi-ellipse 48 x 16). If you shorten the string, the ellipse will become proportionally flatter. If you lengthen the string, the ellipse will become proportionally more round. You will have to play with the spacing between the nails and the string length to get the shape and size you want.

Regards

carl21l

06:15PM | 12/04/04
Member Since: 03/21/04
171 lifetime posts
check this site for details:

http://www.benchnotes.com/Laying%20out%20an%20oval/laving_out_an_oval.htm

JMHO

Carl


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