Spiral stairs with channel section as stringer

[CzesioR]

Hi,

Please look into attached file and tell mi how to measure the rotation angle of profile used in sweep blend model?
Profile 1 and Profile 2 are the same but rotated along path, rotation angle is the function of stringer length.
How to calculate it? Any idea? I have to give such information for contractor...

[benmay]

Not exactly sure what you are after, do you mean the included angle of the curve for each stringer? What exactly do you need?

[CzesioR]

Not exactly sure what you are after, do you mean the included angle of the curve for each stringer? What exactly do you need?

exactly I need angle of torsion of each stringer