when you have a large dia radius and the starting axis is not given but you know that from the wall it is 15’6″ does anyone have a simple way to layout the rad? using a clock face for example 12 is the 15-6 point and half way to 6 is the stating point of the rad there must be a formula that if you loose a ft each time and 15-6 is zero the 14-6 at a right angle is ? and 13-6 is? what is this magical formula? does the construction master pro calc do this?
Edited 6/14/2008 12:49 pm ET by boardstrecher
Replies
Circle Calculators
Boardstretcher, you can use the Pythagorean Theorem to find your points on the circle.View Image
Joe Bartok
Edited 6/14/2008 3:17 pm ET by JoeBartok
Edited 6/14/2008 3:17 pm ET by JoeBartok
if it is indeed an arc you are trying to lay out you are talking about a section of a circle.
you lay out a circle by finding the center point and then using a nail at the center point to hook your tape measure (thats what the slot is for) you pull it around while holding a pencil at the distance you want to mark.
you can start and stop the circle anywhere you want to, remembering that a section of a circle is an arc.
by the way on the clock face depending on the direction, halfway to 6 from 12 is either 3 or 9, you pick.
seg
I don't know if his radius was mentioned but if its larger then the room can accommodate then he has to use a method like Joe B showed.
We did some work on a house down in TX that was built on a radius of something like 115', or some such radius, hard to pull a tape on a nail for that length!
Doug
too many things to pull a 48 ft rad and i aam only pulling a partial arc uneven on both ends as a wall interrupts i side and a soffit stop the other. the clock was just an example and the 12-6 axis would be the dia [half of the rad]
you won't even notice the arc if it isn't a huge room!
Don't you love the achitects?<G>
Some of this depends whether you want an arc, an arch, or a elipse, and whether smooth transition from spring point or not
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