GeneDavis

What is your scope of work? Did you design the building, its walls, floors, foundation, roof assemblies?

The room's ceiling shape, as said above, is defined by the roof structure over it. The window in its "tunnel" is in a dormer. Is your scope strictly an interior one, with the boundaries just this room and its bathroom? Just decor? No structural scope? If so, just do the roof-shape overhead parts with ceiling planes. Because otherwise, done by roofing, your as-built measurements are going to involve some serious ladder work and forensics to get structure specs. Are you prepared for that?

When a rafter bears on a plate we call the cut a birdsmouth, but when it has no extension for a roof overhang, and the rafter end's plumb cut is at the wall (baseline) line, what do we call the horizontal cut? The seat cut? Whatever it's called, chief does not make that cut in my plan, with the trusses I "drew."

Open the plan. Open plan view Roof Framing. Select all the center bay trusses. Open for spec and lock envelopes. Select the center bay roof and zoom in to the edges where the center bay trusses with their 2x12 top chords bear. The edges, both sides where the drywall cut is happening, align to the wall's outermost layer, the drywall layer. Move the roof edge to the main framing layer edge, then in 1/8" more. That's what fixed it for me.

Your drawing?

Check to see all windows are on same floor. If the uppers cross a ceiling line even with upper room as open below, they won't mull.

I initiated the post here about truss ends cutting walls and my zipped file is 10.2 megs and it refused, causing me to use a cloud link. Fortunately, I was NOT refused when attaching it to a support ticket just now.

I've drawn this plan with a central bay roofed with trusses that bear on their 2x12 top chords. The program does not cut a seat cut on the truss ends. Something makes the walls on the outboard side of the truss bearing walls lose their drywall finish near the ceiling, and I think it relates to the uncut truss ends. Plan attached (X18). Here is what you see when in a room on the outboard side of a bearing wall. Here is a building section in which I highlight the truss bearings. https://drive.google.com/file/d/1lX_BYEhU96gJ2DW4hxAUBqi2nwAWK-rz/view?usp=sharing

Plan file attached in X18. At plan top, a pair of bedrooms each have a bay window. I did exactly what @Renerabbittdoes in a video to raise the floor of the bays, but the siding below has voids at the joins. What is wrong with my build? At plan right, a bumpout room with no basement under it has its walls somehow fiddling with the siding above. This image shows one side, and the same condition is on the other. What is the fix here? fixsiding.zip

Thanks, @Renerabbitt! I show here my screen, I'm in terrain mode, layerset All layers OFF, and as you can see, I turned ON the terrain perimeter layer, and terrain features layer (in which sit the polyline holes). Don't know how, but yes, there are four. I select one, key DELETE, but it does not delete. What is the secret here to a.) deleting a hole feature, and b.) editing the only one I need?

That's a solid question. There is a solid answer, and it's solids. Or Sketchup, or Blender.

I am completely lost with this one. Here is the plan file. I need to edit the hole at the bay windows, the cantilevered room, and at the screened porch. Cannot edit terrain hole.zip

I've various things in my plan such as a post supported room and bay windows and an unexcavated porch that require I edit the terrain hole. I don't want to uncheck the option that results in terrain through the building. I go into terrain mode, plan view, click terrain, click the edit terrain hole thing, perform edits, and when I take a camera view, it is like nothing happened. And I unchecked auto rebuild terrain.

And you'll have to fiddle with the texture origin to get the 3D to look right.

I will be including some bay windows in a new project. I've not done bays before. Specifically, I am talking about the kind of units that come as assembled units from Pella, Andersen, and Marvin. Mulled and joined with fastening jambs, floors under, and tops over. I was wondering how others deal with these. I do work for friends and family and two builders, and always am drawing plans and details for windows with the window source known. One builder always uses Pella, the other always Andersen 400. I asked Grok AI how to address a bay window when drawing plans with Chief, and here is what I got. Look this through and tell me how you do bays bows or boxes that go in as factory assembled units. Begin Grok reply . . . Factory-built bay (or box/bow) windows from manufacturers such as Andersen, Pella, or Marvin are treated in Chief Architect as specialized units that require accurate modeling of the unit itself, its projection/geometry, manufacturer specifications, and—most critically—the rough opening (RO) in the main wall so the assembled unit installs cleanly. Chief’s automatic Bay/Box/Bow Window tools create a parametric bump-out with component windows and walls; these can be customized to match manufacturer data, or you can model a more “one-piece” factory unit with symbols, pass-throughs, or manual construction. Manufacturer catalogs (Andersen, Pella, Marvin) are available in the Chief Architect 3D Library for many standard windows and can serve as a starting point, though true one-piece bay units often need additional customization or notes.⁠Chiefarchitect Here is the practical process for detailing plans so the units can be ordered and the openings framed/built correctly. 1. Gather Manufacturer Data First Obtain the exact product literature (size charts, architectural detail manuals, installation instructions, and measuring guides) for the chosen series (e.g., Andersen 400 Series bay/bow, Marvin Ultimate Bay, Pella equivalents). Key items to extract: Unit (frame-to-frame) dimensions (width, height, projection/depth). Angle (typically 30° or 45° for bays). Minimum rough opening (RO) width and height—often unit size plus ~½″–¾″ or more per side/top/bottom for shims, flashing, wraps, brackets, or sill panning (manufacturers frequently note that the published minimum RO may need to be increased). Projection measured from exterior sheathing to outer face. Support requirements (cable kits, knee braces, headers, etc.). Any seat board, roof, or floor details supplied (or noted as by others). These values drive both the model and the plan dimensions/schedules/notes.⁠Edge.sitecorecloud 2. Place and Size the Bay in Chief Architect Automatic method (recommended starting point for most plans): Go to Build > Window > Bay Window (or Box/Bow). Click on the exterior wall. Select the unit and open its specification dialog. Adjust overall width (usually the widest/back dimension where it meets the main wall), depth/projection, side-wall angle, wall type, floor/ceiling heights relative to the main room, and roof options. Tab-select (or use Select Next Object) individual component windows and open their Window Specification dialogs. Set exact widths, heights, types (casement, double-hung, picture, etc.), and other attributes to match the manufacturer configuration (e.g., 1:1:1 or 1:2:1 sash ratios). In X14 and newer, you can explode the bay into editable walls + windows if further customization is needed (parts cannot be recombined).⁠Chiefarchitect Manual method (for more control or non-standard geometry): Draw the projecting exterior walls with the Build > Wall > Exterior Wall tool. Place standard windows in those walls. Break the original wall segments at the intersections, make the through-wall segment Invisible, and treat the bump-out as its own room (adjust Structure panel floor/ceiling heights, moldings, etc.).⁠Chiefarchitect For a closer “factory one-piece” appearance: Use or create a Window Symbol / Exterior Fixture (from Core Catalogs > Architectural > Windows > Window Units > Protruding, or a custom solid/polyline-based symbol) that inserts into the wall, combined with a Pass-Through opening for clean framing and trim. Some users model the full unit (including top/bottom) as a symbol and place a pass-through for the RO.⁠Chieftalk.chiefarchitect If manufacturer library objects exist for the series, place them from the Library Browser and adjust sizes/labels as needed. Note that full factory bay assemblies are not always pre-modeled as single parametric units. 3. Define Accurate Rough Openings and Framing The critical wall opening is in the main (host) wall where the factory unit installs. In Window Defaults or the individual unit’s specification dialog, go to the Rough Opening panel (X14+) or Framing panel. Choose Additional Space or Clearance Gap and enter the manufacturer-recommended additions (sides, top, bottom). This makes the framed RO = unit size + clearance.⁠Chiefarchitect Set header type/size, trimmer/king-stud counts, and other framing on the Framing panel or in Framing Defaults > Openings. For a mulled or bay unit treated as one opening, use the Options panel (Single Wall Hole) so one header spans the full RO. After generating framing (Build > Framing), review/edit in Wall Detail, Cross-Section, or 3D views. Dimension to the RO (jack stud to jack stud) rather than the sash/frame where possible. Ensure the model accounts for wall thickness, sheathing, and any recessed/offset settings so the unit sits correctly relative to the exterior plane. Regenerate framing after changes. The RO dimensions that appear in schedules and dimensions should match (or be clearly annotated to) the manufacturer’s published minimum RO, with a note that the builder should verify/increase for flashing, wraps, etc. 4. Annotate Plans, Schedules, and Details for Purchasing and Construction Floor plans / exterior elevations: Dimension the overall bay width (at the main wall), depth/projection, side angles, and—most importantly—the RO width and height in the host wall. Suppress or customize automatic labels as needed; add callouts with the exact manufacturer model/series, unit size, and “See manufacturer installation instructions.” Window schedule: Include columns for manufacturer, series/model, unit (frame) size, RO size, projection, glazing, finish, and notes. Use custom macros if you need to display both unit size and calculated RO. Cross-sections / wall details / callouts: Show the relationship of the unit to framing, sheathing, weather barrier, flashing, sill pan, head/jamb details, support cables/braces, and any seat or roof structure. Reference the manufacturer’s ADM (Architectural Detail Manual) or installation guide. Notes / general notes: Explicitly state “Factory-assembled bay window by [Manufacturer/Series]; install per manufacturer instructions into framed rough opening of [exact W × H]. Verify RO dimensions and clearances on site. Unit includes [cable kit, etc.]; roof/floor structure by others as required.” List any required blocking, insulation, or support. Materials list / takeoffs: The schedule and materials list will pull the windows; add manual items or notes for the complete factory unit, supports, and flashing if needed. 5. Verify and Coordinate Build 3D views, elevations, and sections to confirm geometry, roof intersection (control via the bay’s roof options or manual roof planes), and floor/seat relationships. Cross-check the modeled projection, angles, and component sizes against the manufacturer size charts. If the unit has a seat board or is a walk-out style, adjust the bay room’s floor height and structure accordingly. Coordinate with the structural engineer for header sizing over the RO and any additional support for the projecting unit. Before finalizing, confirm current catalog data with the supplier—library objects and published charts can lag product updates. Workflow Summary Select product → extract exact unit size, projection, angle, and RO from manufacturer docs. Place/adjust automatic (or manual) bay or symbol so geometry matches. Set RO clearances and framing so the host-wall opening matches the required RO. Dimension RO and overall geometry; populate schedule with full specs. Add details/notes referencing manufacturer installation requirements. Generate framing and review in multiple views. This approach produces plans from which a contractor can order the exact factory unit and frame a precise opening that accepts it without field modifications. Always prioritize the manufacturer’s current technical data over generic defaults, and note that Chief’s parametric bays are excellent for design and documentation but may still need symbol or manual refinements to represent a true single-piece factory assembly. . . . end Grok reply.