Plenums,Shoes and Walls

[Mark65]

Hi
I have decided to learn the mep side of cad as my new employers are an electrical contracting company and they also have to deal with heating & ventilation, revit has been mentioned but as they primarily do refurb or additional work from 2d drawings I thought autocad mep would be a better solution and a lower cost( correct me if im wrong please).

The idea is if I can create this design in mep show it to them as a model which hopefully will show design flaws easier and quicker and as 2d then they will move over to it from Autocad 2013LT, so I have taken a floor plan from work to practice the mep , I have started the ductwork but need to add plenums around the ceiling void edges and shoes where the round duct goes into square, I am having trouble finding these.
I also wanted to add some main walls but they are an odd shape and I only seem to be able to add straight ones, is there a way to draw around what i need and extrude it or raise it up to the slab height above?. I have attached the dwg image and a screen shot of what I have done, any help would be greatly appriciated.
Thanks
Mark

Also on the cad tutor forums.

[Mark65]

Problem answered by StykFacE on another forum .
Thanks

[Wanderer]

Cool.

Answer can be found here: http://www.cadtutor.net/forum/showth...hoes-and-Walls

Also, I'm going to move this from the architecture to the MEP forum, cheers!