Time for another update. Earlier in the week I got another chance to work in the theater. I got quite a bit done all things considered.
Here's what I started with and it looks like a mess with all those wires!
I was ready to put down one layer or 1/2" decking plus two more layers of 3/4" decking to make up the difference between my riser height and the entrance height (minus 3/4" for floor covering). Fortunately, I realized that the landing outside the theater was slightly sloped in one direction, and my riser was slightly sloped in the other. Both within the lines on a level, but between the two it made for about 1/4" height difference across the door opening. I decided to pick the corner of the riser up so that it more closely matched the slope of the landing, and wouldn't you know it, now I only need two layers of 3/4", and the transition between the landing and the riser is closer.
Next case insulation, and it already looks nicer!
After that, I had 24 sheets of 3/4" T&G delivered. The driver was nice enough to help me move the ply from his truck onto the back of mine. I tipped him a Hamilton for his troubles. Not much, but it only took five minutes. This pic shows why I had it delivered rather than hauling it myself. My truck would have made it, but it wouldn't have been happy! And in case I haven't mentioned it, it's times like this I'm glad I got the four-wheel drive.
And finally, here's the first layer of decking down, and it looks a lot better in there.
Now, after the first two rows were glued and screwed down, I came to a rather unpleasant realization. Apparently T&G plywood is 4'x8' nominal. Unfortunately, it measures 47.5 x 72 across the face. I'm sure I knew that, but it's been ages since I've put down decking. What this means is the stuff is intended to go down perpendicular to the joists. After the first two rows, I had to cheat the sheets over enough to make sure the edges fell on the joists. Fortunately I've got another layer going over it (perpendicular to the first) with GG between. I'm hoping between the liquid nails, the GG, and the extra layer of 3/4" decking, I won't have any squeaks.