How much more than the run is the tread depth?

What ever you need it to be,there is no set principal that I am aware of to dictate tread depth.

Riser height can also be a different height as well,although a 12" riser would be rather high.

Is this for outdoor or indoor steps?

Sounds like a test question, someone wasn't paying attention maybe? Most codes lay it at riser height of no more than 7 3/4 " and tread run of no less than 10 ". You can Google most of these questions and get fasrter answers than here at the AMHD.

Sounds like a test question, someone wasn't paying attention maybe?? Most codes lay it at riser height of no more than 7 3/4 " and tread run of no less than 10 ". You can google most of these questions and get fasrter answers than here at the AMHD.

This is right for most places but you need to look into what the code for your specific area says.

I prefer the old 7-11 method. Using your framing square, make the rise 7 inches and the run 11 inches. This is a comfortable stair setup and a pair of 2x6s fit just right on the run for the treads.

Ohio Residential Building Code requires at a minimum of 9" tread depth and a riser height of maximum of 8 1/4".

My code area here is one riser and two treads should be no less than 26" and no more than 28". Now the boga book of codes doesn't address the WE are getting Bigger. And so are our feet. I wear size 12 Now are codes varied on limited access steps. ( basment stairs) But I personally like 11.5 inches of tread and a 7 to 71/4 riser. I had a city inspector that was going to make put the odd riser at the top step Duh! Then another inspactor another job ext. said all the riser have to be equal including the bottom and the side walk in front sloped 1 inch. DUh! I said Cloumbus proved there earth was round ahhh Slope.Feet have memory. Odd step at botom the rest must be exact. Just 1/4 inch or so can trip a person after you start your climb..

The tread depth is typically how many inches more than the run so that it sticks out