Tricky roof dormers

[Anonymous]

Need help with tricky dormers/roof in AutoCAD Architecture.  I'm using V2009 (but have access to V2012 at work if there are features that will make this easier).  I've tried using roofs and roof slabs and solids to carve out the main roof and merge with a dormer like that shown but I cannot get it to work.  Please see the photo.  My roof dormer tools always seem to be quirky.  Andy avice for this type and I'd love to get a CAD example showing this working uploaded. Thanks.

Thank you!

Tom

[Anonymous]

Need help with tricky dormers/roof in AutoCAD Architecture.  I'm using V2009 (but have access to V2012 at work if there are features that will make this easier).  I've tried using roofs and roof slabs and solids to carve out the main roof and merge with a dormer like that shown but I cannot get it to work.  Please see the photo.  My roof dormer tools always seem to be quirky.  Andy avice for this type and I'd love to get a CAD example showing this working uploaded. Thanks.

Thank you!

Tom

[KathyMoffa]

A very badly neated ACA upgrade is to the roof object, but here is my work around its limitations.  The first step is to trick the Roof object into making the gable by drawing a polyline that has a bumpout for the two gables.   After entering & verifying all your roof properties (plate height, pitch, etc.), edit the gable roof edges and change the plate height (I show going from a 10' plate height to a 12' plate height in my example).  You will notice that the roof object correctly elevates the plate height, but undercuts the main roof to the gable overhang.     Next, convert to roof slabs, and use the slab grips to pull the roof overhang under the gable, and to pull back the gable slabs that were created with the bumpout.   Finally, project the walls up to the gable.  In this case, I couldn't get clean results projecting to the roof, so drew a polyline instead.    

A great source for more information on the roof object is www.ausaca.blogspot.com

[KathyMoffa]

A very badly neated ACA upgrade is to the roof object, but here is my work around its limitations.  The first step is to trick the Roof object into making the gable by drawing a polyline that has a bumpout for the two gables.   After entering & verifying all your roof properties (plate height, pitch, etc.), edit the gable roof edges and change the plate height (I show going from a 10' plate height to a 12' plate height in my example).  You will notice that the roof object correctly elevates the plate height, but undercuts the main roof to the gable overhang.     Next, convert to roof slabs, and use the slab grips to pull the roof overhang under the gable, and to pull back the gable slabs that were created with the bumpout.   Finally, project the walls up to the gable.  In this case, I couldn't get clean results projecting to the roof, so drew a polyline instead.    

A great source for more information on the roof object is www.ausaca.blogspot.com

[Anonymous]

Thank you Kathy - you refer to an example, was there supposed to be an attachment?  Thanks!

[Anonymous]

Thank you Kathy - you refer to an example, was there supposed to be an attachment?  Thanks!

[KathyMoffa]

So sorry!  Located but didn't attach.  It's in ACA 2012.

[KathyMoffa]

So sorry!  Located but didn't attach.  It's in ACA 2012.

[KathyMoffa]

Don't know what's happening--it shows on my side, but doesn't get attached.

[KathyMoffa]

Don't know what's happening--it shows on my side, but doesn't get attached.

[KathyMoffa]

Worked from Firefox, but not from IE

[KathyMoffa]

Worked from Firefox, but not from IE

[Anonymous]

Thank you!  I'll take a look at work but from the preview I really appreciate all the stepped-examples.  It shouuld prove very helpful!

[Anonymous]

Thank you!  I'll take a look at work but from the preview I really appreciate all the stepped-examples.  It shouuld prove very helpful!

[ntellery]

Hi Tom

The Roof Object is a lot more flexible than is apparent but it takes some simple but hidden tricks to get it to behave.

I look at Dormers in several of my video's but yours is not looking for a cutout so it's really the 'switch back that is the secret here.  If you go to my channel and watch the roof series, video 2 and 15 but getting it to overhang itself.  You need to trace the outline of the roof to just off the start of the dormer, up to the valley of the dormer and back down, hard to explain but easier to show.  

You prob also have to not draw exactly true lines but just off, to allow room to set edges etc.

Not sure those 2 video's cover all the techniques used but you should find the others very informative.

You may also need to learn how to add edges (vertices) to the RO which should be on one of the early video's.

I've attached a sample of your situation. I've highlighted areas to take a closer look.

Good luck.

[ntellery]

Hi Tom

The Roof Object is a lot more flexible than is apparent but it takes some simple but hidden tricks to get it to behave.

I look at Dormers in several of my video's but yours is not looking for a cutout so it's really the 'switch back that is the secret here.  If you go to my channel and watch the roof series, video 2 and 15 but getting it to overhang itself.  You need to trace the outline of the roof to just off the start of the dormer, up to the valley of the dormer and back down, hard to explain but easier to show.  

You prob also have to not draw exactly true lines but just off, to allow room to set edges etc.

Not sure those 2 video's cover all the techniques used but you should find the others very informative.

You may also need to learn how to add edges (vertices) to the RO which should be on one of the early video's.

I've attached a sample of your situation. I've highlighted areas to take a closer look.

Good luck.