[ Ссылка ] Click on this link to learn how to build stairs. This video will provide you with a simple mathematical formula called the Pythagorean theorem and it can be used to figure the length of a stair stringer as long as you have the over all rise and run of the stairway or width and height. There will also be a YouTube video attached to this video on how to use the Pythagorean theorem.
Ещё видео!