At the high end of the ramp the top flange of the double tee is level or 0 degrees.
At the low end ramp the top flange is warped. It is sloped at 2.28766 degrees.
It would be like having a 1” square steel bar with one end fixed in a vice and have a clamp on the opposite end that could be rotated a certain amount.
At the moment this is not possible with the Structural Tools or with any of the Free Form tools, the workaround to create a surface that will resemble that steel section shape and twist it to the desired angle.