Slopped ridge roof plane

[John Wyza]

How can I build a roof plane that has a slopped ridge? The top of the ridge is 411" and the bottom of the ridge is 320". I need to maintain the fascia top at 229 3/16". Too complicated for me. See attachment

Thanks, John

[carpenterguy]

I don't see an attachment. However I do understand what you need and it can be done.
It is a little involved though, I am sure "someone" will make a video soon.

But create your roof planes as normal, you will have to determine exactly what the pitch is for the set heights (in degrees is best for this) then select one of your roof planes.
Set he degrees you determined in the "Baseline Angle" box in the general tab of the roof plane dialog box.
Once you have that plane set you will have to set the Baseline Angle of the abutting roof to the but negative angle. Now the negative angle roof plane will for some ungodly reason be like four feet lower than it should. Use a cross section window cutting across the ridge and find out the exact difference of heights with a couple cad lines and the dimension tool.
Click the roof plane that needs to come up, hit the transform replicate tool, set the difference of the heights in the 'z' move box and by god, if I did my job right, the two roofs should be together as they should be.


Andy.

Well...that was a worthless post Andy.

[John Wyza]

Andy,
Forgot to add attachment.
John

[billemery]

The hatched roof plane in your attachment can be solved using the method that I show in this thread: http://www.chieftalk.com/showthread....ed+roof+planes

The roof plane to the south (plan south) of it can be solved by the same method.

Perhaps a better solution would be to continue the turret roof around the rest of the way, and connect into its back roof planes with the adjacent roof planes.

If you post the plan I can show you the solutions on your model.

[John Wyza]

Bill, Do you want a zip file of the plans so you can see the problem in 3D?

John

[billemery]

It's best to post a zipped plan file here on the forum,

I can solve it in a couple of different ways, and post the solutions.

I like doing it this way as others can look at the problem as well.

[John Wyza]

Bill, Attached is the zip file.

I am using X4.

John

[billemery]

No file is attached.

[John Wyza]

Bill, My plan file is 17MB. Forum only allows 2MB.
Any suggestions?
John

[Joe Carrick]

17 MB will compress to about 3.5 when zipped. This is still too much so you would need to strip the plan down to less than 9 MB and then zip that. The resulting zipped file should be less than 2 MB.

[Gary Doski]

How can I build a roof plane that has a slopped ridge? The top of the ridge is 411" and the bottom of the ridge is 320". I need to maintain the fascia top at 229 3/16". Too complicated for me. See attachment

Thanks, John

I think he wants to keep the fascia top even (level) not sloped to match ridge.

[John Wyza]

Bill, Well I finally got the plan down to under 2MB. Sure was a lot of work as the plan is over 58kb. I hope this is what you need to help me with my inability to build the roof plan I need.

Thanks, John

[billemery]

Well Darn,
I did it without the plan. Attached is a screen shot explaining the construction. I'll attach my plan so you can play with it.

Let me know if you have trouble figuring it out.

The reason that this works is that by default Chief roof baselines are horizontal. It takes a minimum of three points to define a plane, and the connecting plane must have at least two points in common with the adjacent planes . When I can take a Z (height) value that is given on one plane, and match it to the corresponding Z value on the other roof plane I can connect them with a roof baseline that is by definition horizontal. My new connecting plane is now locked at two horizontal points (at the same height) on the adjacent planes. It will pivot around these two points. I only need one more value to lock the plane in place, and in this case I can use either the peak value, or the eave value.

Chief has absolutely amazing roof tools; but these filler planes are outside the scope of what Chief can do automatically.

I think this problem is particularly interesting in that I generally assume that a ridge has to run horizontally. And, of course it could, but then it wouldn't be such an interesting problem.

[John Wyza]

Bill, Thanks for all your help and patience to get me thru this roof plane problem. I need to stay away from these types of roof designs. I was happy to have the roof ridge go horizontal, but the owner was correct in his judgement.
Again, a BIG THANKS

John

[billemery]

John,
You're welcome. It was an interesting problem to work on.

I had solved a similar problem a few months ago with filler roof planes, and did not explain the solution and why it works very well; so this gave me an opportunity to do that.