FreeCAD Stair Designer

Here is a video on how to design stairs in FreeCAD.

There are plenty of architecture stair designers in FreeCAD, from Arch workbench to macros. Parts of these can be used for the Seed Eco-Home 2 detailing:

1. Use https://wiki.freecadweb.org/Arch_Stairs to generate stringers - by creating a solid stair and flattening it to a stringer. need 3 stringers.
2. Then add treads, and riser blocking.
3. Then figure out attachment detail.

Parameters

• Structure - Massive
• Landings - None

Parameters from Early 2022 Stairs

• Nosing - none
• Number of steps - 15. This means the last step is the building structure.
• Riser Height - 7.69
• Tread Depth - 10.375"
• Tread Thickness - 0
• Landings - none
• Stringer Width - 4"
• Structure - Massive
• Structure offset - 0" - this is probably the bottom stair tread accounting
• Structure thickness - 5.1"
• Winders - None

• Height: 115.375 - height from base of stringer to top of stringer, not including tread on top
• Length: 145.25 - that appears to be the horizontal length from first riser to end of stringer? No idea.
• Width: 1.5"