I seen this guy put Hardie Board over the subfloor and put the two mortar beds directly on top of that.
But that subfloor isn't plywood.
3:59 of the video below.
Those are planks!
Can you really put cement board on the base of the shower floor??
I'd like to follow what this guy is doing but I worry about the weight of using bricks for a curb.
I estimate the shower bed to be around 300 pounds with tile.
Add in a Brick Curb and Tiled Walls.
This Fucking thing is going to come crashing down lol.
Of course, I'm told the floor can hold over 2200 pounds but I can't prove that.
I tested it and it held just over a 1000 pounds with easy and that is with holes in the subflooring.
I'm gonna lug up 2000 pounds when I close in the subfloor and test it again.
I don't understand how plywood and a few floor joists are that strong.
The book says 40lbs per square foot but that information doesn't translate to actual weight on a floor.
https://www.youtube.com/watch?v=doaJt_TsFTU