Useful to include

For a calculation problem: the values you entered (total rise, tread depth, width, and the options you chose) and what you expected to see.
For a guide correction: the guide title and the sentence that is wrong, with a source if you have one.
For a feature request: what you are trying to build.

We cannot give engineering advice or review individual building plans. For that, speak to your local building department or a licensed professional.