I-joist rafters with 2x6 tails - auto rebuild, how do I do it?

[Hoff_Design]

How do I produce an overhang like the hand drawing instead of the rendered model where the roof is an I-joist and the overhang is 2x6 DF? 

[para-CAD]

https://www.bc.com/wp-content/uploads/2018/09/W-spec-guide-BCI-and-VL.pdf

 

RO4?

 

I haven't 3D modeled that in chief, for plans for permit. 
I make cut sheets for me and details for the plans inspectors.

 

 

Edited March 6 by para-CAD

[joey_martin]

You're not going to get Chief to create that detail. A workaround would be a second roof plane for the overhangs. Model it close and detail the rest out.

[PitMan71]

You can create the look just by changing your roof structure to the thickness of the I joist. Leave the "Rafter Construction" as a rafter. Keep the subfacia at  5 1/2. Also, under options uncheck boxed eave. As others have said you will just need to provide a detail showing the actual components.

[ValleyGuy]

4 hours ago, Hoff_Design said:

How do I produce an overhang like the hand drawing instead of the rendered model where the roof is an I-joist and the overhang is 2x6 DF? 

 

Just like @joey_martinsaid, it is possible. When using the double roof planes you may want to double the roof material and adjust it on the smaller roof plane to match better on the larger roof plane. It does section out nicely. 

 

 

 

[Hoff_Design]

Thank you everyone for your input!

I used copy and paste in place on the roofs, made the changes and here it is.  It is not perfect, (not sure how to align the 2x6's to the side of the I-joist) and I would want to show blocking between joists at the top plate. (probably just create a 3D solid for those?)  Had to move out of auto build to manual. This does work well for section view.  

Again thank you!

[Chrisb222]

10 minutes ago, Hoff_Design said:

not sure how to align the 2x6's to the side of the I-joist

 

Just scoot the "rafter tail" roof plane over the thickness of your I-joist. It will throw off your roofing material, as Shane shows above.

[azmoeerebecca]

Chief Architect does not natively auto-build this specific framing detail. However, you can achieve the desired result using a couple of manual workarounds.

Method 1: The Double Roof Plane (For 3D Accuracy)

This method involves manually drafting the tails so they render correctly in 3D section views.

• Create a Second Roof Plane: Use "Copy and Paste in Place" on your existing roof to create a second plane strictly for the overhangs.

• Switch to Manual: Turn off auto-rebuild and switch to manual framing.

• Adjust Structure: Change the framing structure of the overhang roof plane to a 2x6.

• Align the Framing: To align the 2x6 tail to the side of the I-joist, manually shift the "rafter tail" roof plane over by the exact thickness of the I-joist. Note: Doing this may slightly misalign the roofing material textures between the two planes.

• Blocking: You will still need to manually add 3D solids to represent the blocking between joists at the top plate.

Method 2: The Visual Approximation (For Permit Plans)

If you do not need the 3D framing model to be perfectly accurate and just need the exterior to look correct for elevations, use this faster method.

• Adjust Structure: Change your roof structure thickness to match the I-joist.

• Rafter Settings: Leave the "Rafter Construction" set as a standard rafter.

• Fascia: Set your sub-fascia to 5 1/2" (to match the 2x6).

• Options: Uncheck "boxed eave."

• CAD Detailing: Because the 3D model won't perfectly reflect the hand-framed reality, rely on 2D CAD cut sheets and details to show the plans inspector and your framing crew the actual I-joist to 2x6 connection.