sloped arc in 3d

[sr721sr]

I am trying to draw a sloped arc in 3d for a radiused soffit for a building I am working on. My end quest is to measure the radius of the arc to have a CNC router cut a templete for fitting. Any Ideas?

[shift1313]

do you need to draw it for visual effect? or do you have numbers you need to hit with it? Whenever I work with 3d curves is set up some straight lines and use them as snap points. then when i alter the spline curve it will snap to the line so you can move them up/down.

 

do you have the rest of the model? is this for a roof overhang, under stairs, some sort of support?

[sr721sr]

The soffit is in an atrium of an office. I can use a spline to draw the sloped arc, but after trimming it to the points I can't read a radius.

Am I using the wrong line type or commands?

[shift1313]

im not sure if you can pull a radius off it now that you say that. But, if you are sending the drawing to be cut, you dont need to. hopefully someone will have the answer for you.

[fuccaro]

If you have the spline, draw over an arc so that it approximates the spline as much as possible.

[sr721sr]

I can't draw the sloped arc in 3D, only the spline. My reference points along the radius are sloping. I can hit them with a spline, but the only way I can hit them with an arc is to reset my UCS, and that only works for the first few, then it dosen't recognize them.

[SEANT]

It sounds like you are describing a helix.

 

This thread (http://www.cadtutor.net/forum/showthread.php?t=31757) does not involve architecture but may be dealing with the same sort of problem.