Here I'll show you the steps of DVD burning. 1  Add videos to DVD Burner. 2  After loading source video files, you could select subtitles and audio tracks from source videos, play back videos, etc. 3  Set disc menu (optional). 4  DVD burning settings.
Woodworkbykirk is right. I would go with the 11.25'' treads if you have the horizontal space, and a landing would be ideal. Australian code requires a maximum of 18 straight risers before you need a landing at least 4' in length, but I consider this extreme if you have room for an intermediate landing.
I assume, since you are mentioning 1/2 a floor, that you mean a staircase with a landing in the middle, and you want to know how many stairs there are in one flight of stairs before reaching a landing. In this case you would have 7 to 10 steps, depending on the height of the story.