Chief Architect Help Database - Article Number: 297
How to build a story and a half structure where the main roof attaches to a short stub wall that rises above the second story floor platformThe information in this article applies to:
- Chief Architect X2
- Chief Architect X1
I want to build a story and a half, also known as a Cape Cod or attic loft style structure where the main roof attaches to a short stub wall that rises above the second story floor platform. How can I create this in Chief Architect?
Scenario 4: Roofs Bear on Short Stub Wall
Creating a basic floor plan
- For the purposes of this example, select File > New Plan to create a new blank plan in which to work.
- Draw a basic, 4-walled rectangular enclosed structure 40' x 30' using the Straight Exterior Wall tool.
- Once you have created this structure, select Build> Floor> Build New Floor to display the New Floor dialog.
- Choose to Derive new 2nd Floor plan from the 1st Floor plan and click OK.
In Chief Architect X3, this will display the Floor 2 Defaults. For the purposes of this example, at this time, we will leave these settings at their defaults and click OK.
- On the second story, select the left wall then hold down the Shift key on your keyboard and click to select the right wall as well.
- Click on the Open Object edit button to display the Wall Specification dialog, go to the Roof tab, and check Full Gable Wall, then click OK.
- Next, select Build> Wall> Straight Interior Wall and click to drag and draw two interior walls from left to right, as in the image below.
- Click on one of the Interior walls using the Select Objects arrow tool, then hold down the Shift key on your keyboard and left click to group select the second wall as well.
- Choose the Open Object edit tool to display the Wall Specification dialog, and on the Roof tab, specify these two walls as Knee Walls then click OK.
- Next, open the Room Specification dialogs for the rooms defined by these two interior knee walls as Storage.
Note: Giving the room a name such as Storage instead of Attic will force Chief Architect to recognize it when generating the roofs. Basically, these rooms are dead storage areas behind the knee walls.
- In Chief Architect X3, set the Finished Ceiling (F) height value to 0" to assure that the roofs bear on the second floor platform.
In Chief Architect X2 and prior, on the General tab, set the Ceiling Height to 0" to assure that the roofs bear on the second floor platform.
- Select the Structure tab and uncheck Ceiling Over this Room.
- In Chief Architect X3, select the Moldings tab, uncheck Default, and Delete the Default Base Molding.
In Chief Architect X2 and prior, go to the Moldings tab and clear the Height of the Base Molding.
- Click OK to apply these changes and close the Room Specification dialog.
- Select Build> Roof> Build Roof to display the Build Roof dialog.
- Type in 12” in the box next to Raise Off Plate.
This will cause the rafters to be raised 12” off of the second floor deck. Chief Architect will provide a 12” stub wall between the deck and the underside of the roof plane.
- Check Build Roof Planes.
- Click OK to generate the roof planes and close the dialog.
- The roofs have built 12” above the second floor platform.
Here is what the eave area looks like in a cross section for this scenario.
- Save your work.
Article Number 451: How to create a story and a half structure where the main roofs bear on the top plate of the first floor walls
Article Number 633: How to build a story and a half structure where the main roof bears on the second story floor platform
Article Number 835: How to build a story and a half structure where the main roof attaches to a shoe nailed to the second floor platform
Last updated on: Jun 10, 2010
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