Hi Morgens,

The step nosings at 30 that are showing up in the dxf are correct as StairDesigner is drawing the step housings.

The step housing recesses are set back 10 from the step nosing so 40-10=30.

The first step on the left string shows up as 40 because the housing is in the post.

The variable nosing positions on the left string are due to the way StairDesigner calculates the straight edge of string when you set it to straight in the flight parameters.

The program takes into account the steps in the post and this creates an error in the string to nose positions.

In reality, if you don’t take the extreme steps  into consideration the program is setting a constant nosing to 50mm:

Although the nosing are not following the string edge (or vis versa,  as one would hope, the calculations of the actual step positions is correct and you can either build the stair from these drawings or change the stringer edge to be parallel to the nosing. Either way will work with no problem.

All the best,

Ness