Wall reference line

[Anonymous]

I have the impression that AC is envisioned with the wall reference line on the interior of a perimeter wall. Someone correct me if I am wrong. ( my understanding result from the way windows are placed)

I do not like this and this is not correct .

Buildings have structure and the primary relation of the FACE of the wall (or sheathing) to the structure and not the interior face.

[Dave Jochum]

I'm not clear on the references you're making. For a wall with the following materials (from inside to outside face)--gyp bd., framing, plywd. sheathing, bldg. paper, wd. siding--I define the core as the framing only, as that is what the dimensions are tied to. When I am drawing new construction, my reference line is on one side of the core. When I'm drawing an as-built wall, I position the reference line at the interior face of gyp. bd., since that is what has been measured in the field and saves me from having to add the gyp. bd. dimension to all my measurements. I have no problems doing this with AC. Am I missing your point or does this help?

[Anonymous]

The wall reference line has typically (based on the default composites among other things) been presumed by Graphisoft to be on the exterior face of the wall. I have always prefered to use the inside face for a variety of reasons (especially for joining interior partitions to concave corners of exterior walls), but either approach is easily accomplished and a matter of choice for each user. Just be sure to set up your composites correctly. There was a lengthy discussion of this subject a while back. An e-scribe search on wall reference lines should turn it up.

[__archiben]

in most of our projects, achieving an specific internal area is an important part of the brief and can eventually be bound into 'employer's requirements' and contract docs. in this case having the reference line of the wall on the inside is good practice in more ways than one - if, (read: when ), the wall construction changes, the internal face will always remain where it was preserving the area requirements.

in other cases, a 'building line' may be set so stringently by planning that it would make sense for the external face to carry the wall reference line and be set in stone.

as matthew says, it is a matter of choice for the user - depending on the way you work and factors from the project . . .

~/archiben