Here is a quick study of the three types of tread extensions that are probably the most common. I can probably make this happen but it will have a number of new parameters in yet another sub-menu.

With the half and full round, the riser simply follows the nosing dimension, however with the square cut extension the amount of the riser extension could be independent.

For both the full and half round the radius of the curve is paramount but also the placement of the center of the curve in the Y direction (perpendicular to the stringers). The extension variable can be used for the Y-dir placement of the curve.

The round nosing makes things a bit interesting but that can also be dealt with by breaking things down into a piecemeal modeling algorithm and then using some boolean addition of solids.

The parameters shall be:

Tread Extension Options:

Extension Side: Both, Left, Right
Extension Type: Square, Round, Half Round
Tread Ext. Length: 10" etc... (this variable also sets Y placement of center of curve)
Riser Ext. Length: 8" etc... (only applies to the square ext.)
Extension Radius: 10" etc... (only applies to full or half round extension)

I never get a day of rest, maybe after this update I'll move back to the Floor plugin...

If I enable some turn outs and volutes I will need to adjust for these but also I need to provide some additional parameters so one can fine tune the placement of the handrail and its termination:

So this is currently a specific limitation when it comes to handrails:

The issue here is that each run of stairs literally needs it own handrail sub-menu (set of parameters). Globally the handrail options are fine but as soon as you start adding landings you then have multiple stair runs and it quickly gets complicated. Note that the same handrail settings get applied to each run of stairs currently, this is less than desirable with complex stairs.

Of course the workaround for this is to not rely on the automatic landing functionality and create each separate run of stairs as a separate assembly (linear stair runs only). However this negates the convenience of having the landing and winder options that I recently added.

Yes, I’m a bit in the weeds now but I want this new handrail system to be as functional and fully featured and efficient as possible. I will need to put on my thinking cap and come up with a viable solution that is not too complicated (for a complex problem).

Tutorial 59 - Multi-Board Treads and Side Spacers (7:15 min.)

Version 3.8.2 - 01.05.2025

• Added balusters to the stair module for vertical and OTP handrails.
• Added newel posts to the stair module for vertical and OTP handrails.

Tutorial 60 - Balusters, Posts and Handrails (16:39)

Version 3.8.3 - 01.10.2025

• Added a "deck" profile or option for handrails (with balusters) to the stair module.

Tutorial 61- Handrails for Decks (8:51 min.)

Version 3.8.4 - 01.14.2025

• Added a minimum winder depth parameter for all stair winder types.
• Adjusted the deck handrail algorithm for narrow cap rails (2x4).