Structural Member Keypoints

Building form and component keypoints are designed to work with associative dimensioning as a means of identifying points where associative dimensions can be placed. When changes or modifications are made to the dimensioned form or component, the associative dimensions update. These keypoints are in addition to the default element keypoints which are identified by tentative snap points, and Structural Snap keypoints which are distinguished from others by a special cursor icon.

The following section illustrates available keypoints for associative dimensioning functionality for the various Structural member types. To simplify the discussion, the arrangement of keypoints depicted reflects the default condition of the application with respect to the keypoint divisor. By default, it is set to a value of two, dividing all elements into two equal segments. Color coded keypoints illustrated here are for reference only and do not appear in the interface:

Blue – Vertices
Green – Edge mid point
Red – Baseline element (connects placement points)

Member/Section Type	Structural Snap Keypoints	Default Element Keypoints
Solid polygon
Hollow polygon
Solid round
Hollow round
Tapered member		Note: Tapered members must have similar sections at each end. That is, an I shaped section must taper to another I shaped section.
Curved member path		Note: Curved members have the same number and locations of keypoints as linear members. Modifications to the member path element change the size or radii of the member.
Slab/Plate	Not applicable
Copes/Cutbacks	Not applicable	Note: As the cope and cutback geometry varies, so does the number and location of keypoints. Added details like radii also increases keypoints.
Linear analytical		Same as Structural Snap keypoints