Concrete slab question

[fxpose]

Re: Concrete slab question

I think prepping for a suspended slab was far less labor intense than filling and tamping/compacting that area will fill material.

[fxpose]

Re: Concrete slab question

Thanks guys! Early this morning I removed the column, added additional joists, and nailed down the bottom plywood form.

[ThisOldGarageNJ]

Re: Concrete slab question

fx,
after looking at the pic again,, that is not a tremendous span.. in my opinion you could surely leave it out.. with the rebar you should be good to go.. and like neil said it may add too many additional stresses.... and most of us have enough stress already (snicker)
Keep going
Mark

[fxpose]

Re: Concrete slab question

What does this centre column do ?

That's a good question.
Having never done this type of construction before I thought the center column would give additional support but figuring the slab will be supported by sitting on top of the foundation walls on all three sides, why would I need it, considering the small area involved? There will be plenty of rebars also, so on second thought perhaps there was no need for this center column to begin with.
I'll probably just remove the top three blocks of the column as those cores are not filled yet and cut the rebars. I'll just add an additional wood bracing across the middle there...

[Neil2]

Re: Concrete slab question

What does this centre column do ?

In any case, I would isolate it from the triangular slab. Connecting it structurally to the slab will induce all kinds of stresses and it will likely produce cracks.

Don't forget to allow for drainage of the "void" under the slab.

[fxpose]

Re: Concrete slab question

This morning I nailed in a few support braces for the plywood form. I think this is plenty support to handle the weight of the concrete pour. I will also prop a couple of 2x4's under it.
Tomorrow, I plan on laying down some plywood, form rebars on top, erect perimeter forms, and pour the slab.

I have one question though: Should the center block column tie directly in with the slab or should the slab simply rest on the column and be independent of one another in case of settling? I could cut the column rebars and cover the top of the column with a piece of plastic sheeting before pouring the slab if they were to be independent.

[fxpose]

Re: Concrete slab question

Thanks Mark!

I will be suspending the triangular area and see how that goes, labor, time, and material wise.
Yesterday, I framed the interior perimeter of the block walls with PT 2x6's (I've got too many of them laying around everywhere as you know) and secured them with Tapcons. I also erected a single column of blocks, anchored in concrete footing, in the middle of the triangle.
I will add several 2x6 cross braces and then top that whole area with plywood. I will post photos tomorrow.

[ThisOldGarageNJ]

Re: Concrete slab question

I'm having serious second thoughts about suspending the slabs in the other two areas. A few people have advised me against doing this due to safety issues and also the added cost of materials, especially all the additional rebars required to reinforce the slabs if suspended.

here is a pic of a commercial suspended slab,, im sure you could do something similar with either microlams or PT lumber,, Maybe,,(beating a dead horse) you can cut the hot tub into sections to fit the area you have to fill and use it for a bottom form,, as long as you support it well and maybe throw a few block supports here and there you would be okay..

Just trying to help...

Mark

[ThisOldGarageNJ]

Re: Concrete slab question

go with the grinder with a metal blade.... DUST MASK for sure...

[fxpose]

Re: Concrete slab question

I thought that thing was supposed to become a storage shed?

I threw that idea out. That thing is too heavy to move. I would need a crane or hire 10 guys from Home Depot to help me move it but that can be costly.

[fxpose]

Re: Concrete slab question

It's fiberglass, well at least on the inner and outer surfaces, but who knows, it can have some metal reinforcement on the bottom half where it is thicker and double walled.

[Archena]

Re: Concrete slab question

I thought that thing was supposed to become a storage shed?

[ThisOldGarageNJ]

Re: Concrete slab question

is it made of metal or fiberglass ??

[fxpose]

Re: Concrete slab question

keep picking up those 15$ pallets at home depot ......

I'll be there first thing tomorrow morning......

almost forgot... You can cut up the giant bathtub thing and throw it in there too !!!!!

I might just take an angle grinder to it this week and do that. I don't think I can get rid of it any other way...

[ThisOldGarageNJ]

Re: Concrete slab question

almost forgot... You can cut up the giant bathtub thing and throw it in there too !!!!!