What are your thoughts on this pour. Basically want to rip plywood out and pour. My only worry is the area above each joist cracking. Will be about 2.25" thick.
I read the applicable FAQ(s) and still need helpRemove the plywood and then use the joists to create your joints if you don’t have a concrete saw. Depending on how many you have to remove that is.
You would essentially pour from the wall to the first joint, get it set but not dry. Then remove the joist and pour from the first section to the end of the second joist. Once set remove the next joist and repeat.
This is an interesting concept i didn't think of. Honestly i have no problem removing the joists, i was just worried the shed would splay out if i removed ALL the joists.
It might, that’s why it would be best to keep them in until you are ready to remove them. The concrete will also add a lot of pressure to the outside of the shed which could cause significant bowing at the bottom without the joists holding it in place.
Once the concrete is dry you are free to anchor the shed down on top of it if you wanted
Good point on the added stress of the concrete, i think subconsciously i was thinking about it but it hadn't occurred to me how much stress that would add.
What do you think about cutting the joist down to maybe like 2" high so there's still some support but not as much trapped wood? At the end of the day its a shed floor not a garage so if it develops small voids(after many years) i cant imagine that would be all that detrimental.
How many joists and how far apart are they? Is the shed sitting directly on the ground now or is it on blocks?
Personally I’d remove every joist completely after each section. The perimeter of the shed should be enough to keep it together. You could even anchor the shed to the slab as you go if it seems like it is splitting
11 2x6 joists 16" on center and the perimeter is 2x8s. Only the perimeter is sitting on the ground so middle of the floor is floating which is really the crux of my problem i am worried that sagging will occur with some of the heavier machines i am getting (hindsight is 20/20 should have went concrete to begin with)