Quoted from NPO:
Thank you . I will disappoint most when I say that I plan to put 3-4 in that lil' cubby hole to the far left opposite the foot of the stairs, and that will probably be it.
Search for my name in this thread, and you'll see there are a lot of posts explaining that I plan to hold the line at 4 and keep room for my other hobbies .
Getting that 7ft Valley ZD-8 pool table (read: 1 piece slate) is going to be a "good time" down those stairs. I plan to go get some 2x4s, some truss supports, and cut them at angles to support the stairs. The pool table is 700 lbs and with 4-5 guys working it down the stairs, the stairs will need some support or we risk them bowing.
Why didn't you put the slate down there first and build around it?