ArchiTECH Tuesday: Curtain Wall Demo Panel with Door Replacement in Revit
Date: September 1, 2015
Often in projects, especially in renovation work, we wish to demo a portion of an existing curtain wall to limit its size or to insert an operable window or door within the boundary of the curtain wall. Revit does not provide an easy means to accomplish this task as individual cells cannot be demolished independently of the host object.
No matter what we do to try to hit the curtain panel with the demo hammer, it won’t work. Even attempting to change the panel in the properties palette fails to achieve the objective.
So in order to accomplish our BIM goal of demolishing the panel and inserting an operable door into it we will have to nest two curtain walls within the opening provided by the “empty system panel”. The first curtain wall will allow us to have the correct demo graphics in all views as well as allowing us to track the quantities and size in a BIM workflow. The second curtain wall allows us to place the door and also utilize it for correct new construction graphics in all views as well as any rendered views. Here is an overview graphic that describes the entire process.
Step 1 – Replace the existing panel with an Empty system panel and delete the bottom mullion.
As shown in the following image, tab select until you get the desired panel selected in the Revit editor. Unpin the curtain panel and use the type selector to swap the current panel type with the “Empty System Panel” type. Now select and delete the bottom mullion
When your curtain wall resembles the image below, move on to step 2.
Step 2 – Duplicate, Adjust and place your demo curtain wall
Now we can duplicate our existing curtain wall style by right clicking and using Create Similar. Once the wall style is active, click type properties, duplicate and give the new style a meaningful name like Storefront DEMO. For this curtain wall style, we will remove all the vertical mullion assignments, and all but the Border Type 1 assignment in the horizontal mullions frame. This will result in a single bottom mullion and a piece of glazing. Use your properties palette to set the wall properties to Top constraint Unconnected with the correct explicit height or simply drag the top of the wall ‘til it aligns after you have placed the wall in a plan view as shown in the following image sequence.
Now comes the fun part… Hit it with a hammer in a “New construction” view or change the phase created and demolished properties in the palette as shown below.
At this point you can duplicate the glazing panel type and assign a demo surface pattern to a duplicated glass material for complete graphics in all views. The following poche can be used with an import scale of 0.25, as shown in the image following.
- *DEMO_DASHED_45, Dashed lines at 45 degrees
- 45, 0,0, 0,.5, .5,-.5
Go ahead and check your existing, demo and new construction views and make sure the Curtain wall is well displayed by the correct phasing and phase filter assignments as shown below in assorted viewpoints.
Step 3 – Create a Duplicate wall style for the new Door. Create a duplicate curtain wall style and name it according to your standards. Set the default Curtain Panel to use your Curtain Wall-Store Front-Dbl door type and change the Horizontal Border 1 mullion assignment to none as shown in the image below.
Draw this wall “curtain door” style just like you drew the demo curtain wall, but set its creation property to new construction and its demolished property to none.
Now double check your view and make sure you are happy with the graphics. Are they similar to those shown below? Mission accomplished!
By: Richard Binning, Director of BIM Technology; Check out his blog: Beside the Cursor; http://www.integr-8.com/