Creating an extended gable end

[DrakeCanyonArchitecture]

My apologies if this has been covered somewhere but I can't seem to find anything on it. I have a gable end that lands on top of another roof and wondering what would be the easiest way to clean this up. I tried stacking another wall on top of the existing wall but could not get them to join. So I have drawn a 17' tall wall (picture attached) that extends into the garage but can't figure out how to modify the wall in the shape that I need. Even if I succeed at doing it this way, I am assuming that the portion of wall that extends onto the roof will show in plan view making it appear hat the wall extends into the garage. I appreciate any help.

[DrakeCanyonArchitecture]

I ended up stacking a second wall to create the gable. It leaves a visible line but this is probably close enough for my purposes for the time being. I was happy to see that the upper wall does not show in plan view. 

[David_W_Koch · Accepted solution]

You could edit the roof line of the original Wall to extend it to the underside of the Roof.  If the Wall extends beyond the Roof extents, autoproject may not work, but you should be able to view the model in an elevation view perpendicular to the Wall and then draw a polyline representing the Wall top and extend the Wall to the polyline.

[David_W_Koch]

If the Wall does not extend beyond the offset exterior corner (except above the lower, projecting Roof), you may have to extend the Wall and then edit the floor line, as well.

[DrakeCanyonArchitecture]

I finally got it. Thank you for your direction! The biggest problem that I had was learning to define the UCS so I could draw the polyline. Here is what I did:

1. Modified the height of the wall so that it extended through the roof. (17')
2. Changed the UCS to the face of the wall
3. Drew a polyline across the bottom of the wall, vertically up to the garage roof, and up the pitch of the roof. (Picture)
4. Modified the floor line by projecting to polyline.
5. I repeated these steps for the top of the wall/gable. For some reason the wall didn't want to auto project to the roof slabs. *edt: I just re-read your reply and you had mentioned that autoproject may not work.

I'm sure there is probably a faster/easier way than how I did it, but at least this is a good starting point for me. I appreciate the help!

[ntellery]

It can be quite frustrating when seemingly simple problems become complex to resolve.
One way I've used is to extend the wall the full width, project to roof and then add an opening with to remove the bit and then used the edit in place tools to set floor points to remove the lower portion and then I can delete the opening.  The benefit of using the opening is it might be easier to place but also just using the edit elevation in place and choosing the wall and roof should give you enough info to edit it correctly.
Depending on your wall style, the above might leave healing problems when the wall turns the corner and then messing with your cut plane (which should be below the gable anyway).

Another way I've used is creating a 3d mass element or solid by drawing the shape in elevation and extruding and then adding it as a body modifier to the wall. Even this can mess with the clean up around the corner some times.

Other times I have just created the extra object and put a thick white line over the elevation so it's blocked out.

Often you just want to get the job done and out the door. 🙂

[DrakeCanyonArchitecture]

Agreed. I spent a few hours experimenting with this. It does seem like it would be much easier to do considering that this isn't a real uncommon situation on residential projects. It seems like they could make it so that you could project the wall sideways like you can in the up/down direction. Or a parametric gable perhaps. But, I'm no programmer so who am I to say. I have been using another CAD program for many years so it's like trying to find my way around. I do love the program though.

[Danny_JVentura]

Helped demonstrate outer wall within the home. Agree ease of opening tool helps the feasibility of this method. Edit in place allows to have wall above floor elevation. Structurally there should most likely be some wall there in the attic :).