1. Scale vertically from floor to floor - The stairs will automatically adjust.
2. Set the Minimum Riser Height ↑ - The total height will be divided into stairs that are either equal to the minimum or a little above it.
3. Choose how the steps should be calculated by Fixing specific settings ().
4. Customize the Nosing, Tread Returns, Stringer Width or remove the last step in a click.
You can fix certain settings so that no matter how you scale the stairs component, those settings will be maintained and the stairs will be calculated accordingly.
Settings marked with a (lock) determine how the stairs are calculated. These settings can interfere with each other so it is best to use only one of them, and keep the rest at 0!
The Fixed Width setting is not marked because it does not 'compete' with any other settings.
Fixed Total Run
You can set the Total Run for example to 200 cm (all other Fixed settings are set to 0):
If you then scale the component horizontally, it will snap back into place maintaining a fixed total length of 200 cm.
You can scale the stairs vertically freely. The number of steps will change, their length and their height accordingly, while still maintaining the fixed total length of 200 cm.
Fixed Comfort Relationship
If you scale the steps horizontally, they will snap back into place.
If you scale them vertically, they will recalculate, adding or subtracting steps if necessary while maintaining this comfort relationship between the Treads' length and Risers' height (2R+T).
More about the Comfort Relationship AKA Blondel's Rule here
You can set the treads for example to 32 cm (all other Fixed settings are set to 0):
If you then scale the component horizontally, it will snap back into place maintaining the steps at 32 cm long (+ nosing).
If you scale the component vertically, the component will add or subtract steps, each of 32 cm long, so the stairs will change both vertically and horizontally.
Fixed Settings Disabled
If you set all the 'Fixed' settings to 0 you will be able to scale the stairs in all directions.
Show / Hide The Last Step
In many situations you may find that the last (upper most step) should be the finished floor.
Simply click on the last step with the Interact Tool and the last step will be hidden. Click again to bring it back.
FlexStairs with WallCutter
You can easily convert FlexStairs into a WallCutter component to cut through . . . Floors! 😮
Comfort Relationship AKA Blondel's Rule
Blondel's Rule for comfortable steps is a relationship in which:
2 Risers(R) + 1 Tread(T) = a length between a Minimum and Maximum
As long as the stairs maintain this relationship they are considered comfortable to walk on.
2R + T = Min-Max
61-63 cm - Israel, Norway
61-65 cm (24" to 26") - Some states in the USA
55-70 cm (21.7" to 27.6") - (Wikipedia?)
62 cm may be considered as the optimum relationship for super comfortable steps *
* Since we began working on FlexStairs (and before that) we got to step on quite a lot of different steps who's relationship varied far above and far under 62cm, and they were very comfortable . . . hmmmmm
In some countries keeping with Blondel's rule is a legal requirement! That, along with standards for maximum angle, minimum and maximum risers, minimum headspace and more, So . . .
Make sure to refer to the building codes specific to your location!
Building codes, standards, rules and requirements vary from country to country, state to state and even city to city.
With FlexStairs there are no hard limitations. It is very well possible to create stairs that are not walk-able and may even be illegal. Make sure to refer to the codes specific to your location.