Snowshoes.

 

Haha !! My worry was that we all faceplant into the mud tripping on all the bar and tubing trying to place it and they walk off my job! But seriously, will the mud drop through this or hang up and get stuck?

 

The 3x3 holes will probably work, though I'd use six sack pea gravel mix to be sure. The bricks in the slab are a no go. Pull that trash out and use proper steel supports.

 

Use plastic or stainless or rock/basalt, supports as steel will eventually rust, cracking slab... for long term use.

Use largest aggregates that fit through reinforcement....
Same # of bags of cement with larger well graded aggregates = stronger concrete.

9" slab on vapor barrier, rebar and first wwf at +2" from grade. Second wwf at 3" from top.
Far stiffer then all steel at 4"...
NOT an Opinion. Fact.

Thicken edges under large doors & walls. Maybe a top bar at doors & corners, if you got the $.

Salt/ brine /coast free areas can raise top wwf to ~2" deep....

 

If you have people helping you that have done this before, it’s not an issue. You just step through the grid, or on the bar if needed. Generally, you don’t have to walk around the slab as much as you think when you’re pouring it. With a boom pump or chute, it’s covering quite a bit of ground by itself. Just pick up your feet and keep an eye on where you’re stepping and it should be fine. Like Pounder said, though, be sure to use dobies, not bricks. If you use one under each intersection, you could walk on those depending on where your PEX is tied. It’s not too big a deal either way. Hope this helped!

 

This forum is a circus whether the collective decides to make 350 jokes or give sincere advice.











And I like it.

 

Be interesting to see if they submitted that mix for approval, or just tried to take a shortcut. But i bet we already know the answer.

 

The official story is that it was some random fellow who worked in the yard. He was told to get rid of a pile of busted up brick, so he dumped it in with the aggregate.

 

If someone is going to the expense of a 9" slab with 5000psi why would they want to skimp on using bricks for chairs? Engineers/special inspectors don't allow bricks/blocks to be used to support steel reinforcing because it creates weak points.