Originally Posted by pkinneb
I also drew up a side sketch to determine my riser height as I will probably start working on that and the stage this weekend. Do these sight lines seem ok? The riser will be a finished height of 13" I really don't want to go higher than that if I don't have too. I will still have some wiggle room the drawing shows eye heights of me in the front row and my wife in the back row and no recline so this should be worse case.
So here are my current questions...
1) The boxes that my HVAC/ dead vents dump into should they be double walled with green glue? I will be using 1" Linacoustic to line them and the room is decoupled from the rest of the house. MDF or Sheetrock? I would prefer to make them out of MDF but could use sheetrock.
2) How wide can you span on 5/8" sheet rock? The curve on the front soffit has a 21" unsupported span i'm thinking that shouldn't be an issue what do you guys think?
3) The bull nose on the riser, how far out for carpet? I will be rounding over the fronts and planed on a 1 1/2' overhang does that sound right?
4) Is 1" clearance on each side of the stairs enough? The mfg lists the width of the seats I'll be using as 116" so I was going to leave 118" is that cutting it too close?
5) 15 or 30 lb roofing felt under riser/stage?
Thanks in advance for the help!
Here are some of the thoughts I had on your questions.
Site line for row 1 should only have a maximum of 15-degree angle up, from a level horizontal line from your eye to the screen. the angle to the top of the screen should not exceed that, otherwise neck kinks can occur.
1) yes, double walled and green glued. mass, dampening , isolation, etc.. with thg green glue.
2) considering that most framing is 24"O.C. now days for rafters/trusses, pretty sure you wouldn't have any issues with 21" span with 5/8".
3) I did exactly 1-1/2" for my carpet of the bull nose overhang on my riser.. worked perfectly. If you plan on installing any sort of LED's under there afterwards though, I'd consider 2" overhang, to give enough room.
4) that's kinds of close on the 116".. but I did the same thing, and it worked out pretty good overall. as long as you keep true to the numbers, you should be able to fit the seats.
5) 30# roofing felt is what I used. if you already have 15#, just double it up and use couple globs of GG to hold in place.
Hope this helps.
Really like watching your build come together.