Profiles are determined for banded tendon polylines and distributed tendon quadrilaterals by creating profile polylines. Tendon half spans are created wherever a generated tendon intersects a profile polyline.

The generated half span tendons are oriented in the following direction (which will determine the inflection point location):

• support polyline - span polyline
• support polyline - slab edge
• slab edge - span polyline

Where generated tendons intersect identical profile polyline types (i.e, both supports), the tendon is oriented from the location of highest absolute elevation to the location of lowest absolute elevation. If the end elevations are the same then the orientation will be random (and not important).

Where banded tendon polylines end away from a profile polyline or intersect a slab edge, the tendon is profiled to the mid-depth of the slab at the end or slab edge intersection location.

Where distributed tendon quadrilaterals end between two profile polylines or the slab edge, the tendons are profiled as if they were extended to the next adjacent profile polyline or slab edge (representing a partial half span). This allows two distributed tendon quadrilaterals with different angles to be drawn adjacent to each other along a span and represent continuous span tendons. Where distributed tendon quadrilaterals intersect the slab edge and there is no profile polyline near the edge, the tendons are profiled to the mid-depth of the slab.

Profile polylines can be created in a number of ways:

• Drawing them manually.
• Generating them for the entire floor in one span direction using the Generate Profile Polylines tool.
• Generate span polylines from already defined support polylines using the Generate Span Polylines tool.