I have the raised/energy heel working now for a fink truss where a vertical member and strut is required (heel height greater than 12" approx.). Still working on the wedge and slider cases, they are actually easier to calculate and program, but I figured I would tackle the difficult one first.
When the angle between the strut and top chord exceeds 10 degrees I then apply a scarf cut to the strut at its centerline (try a raised heel height that exceeds 24" and you will notice the difference).
Here is an example of a fink truss with a 18" raised heel. Notice there is no scarf cut at the top of the strut where it meets the top chord.
When the angle between the strut and top chord exceeds 10 degrees I then apply a scarf cut to the strut at its centerline (try a raised heel height that exceeds 24" and you will notice the difference).
Here is an example of a fink truss with a 18" raised heel. Notice there is no scarf cut at the top of the strut where it meets the top chord.