Should I build over this???...

[tc35dforme]

Hmmmm,

Maybe a couple of massive towers with a cable suspension system to support the shed similar to a suspension bridge.

Might be kinda nice to have a shed sway in the wind while you work. /forums/images/graemlins/tongue.gif Relaxing ... wouldn't you think ?

 

[BigEddy]

Build the shed - just stay with a gravel floor. I'd use recycled asphalt. It packs down hard, yet still flex's well. Save you a bundle too, and if it settles, put in more. Just make sure you sink the posts/pilings a long way to get them down to undisturbed soil.

 

[karmakanic]

Those types of slabs are becoming popular here in Texas where we have heavy clay soils. As mentioned, the clay expands and contracts so much, any difference in soil moisture from one area of the foundation to another is enough to crack a conventional slab.

The post tension slab is constructed with heavy steel cables running from side to side in both directions, locked in place on one side and exctending to outside the slab on the other side. After the slab has cured for a couple of weeks a machine is brought in that pulls immense pressure on the free end of the cable, and then locks it with a clamp. This puts the whole slab in tension and allows it to float without cracking.

We had our clear span 10k sf commercial building done with this type of slab 10 years ago and there are no cracks anywhere, even the small hairline cracks that normally develop. So, I'm sold on the procedure. It's just recently I've heard of the procedure moving from commercial buildings to residential. I'm sure it will be popular, we have the highest concentraction of foundation repair companies in the country here in North Texas for a good reason.

 

[Henro]

</font><font color="blue" class="small">( Build the shed - just stay with a gravel floor. I'd use recycled asphalt. It packs down hard, yet still flex's well. Save you a bundle too, and if it settles, put in more. Just make sure you sink the posts/pilings a long way to get them down to undisturbed soil.
)</font>

I think BigEddy is right on....

You have the ideal spot. It might settle and crack the concrete floor.

Do you NEED a concrete foor? I decided I didn't in my shed. The roof will keep the floor dry. If you have clay like I do, a thin cover of crushed stone will be almost as hard as concrete...not nearly as nice, but quite serviceable.

Should the post settle in the future...figure out a way to jack the roof up level again if you need to...

Why give up the perfect spot just because some concrete might crack. Give up the concrete floor and enjoy that perfect spot!

Just an alternative opinion...added to BigEddy's that is... /forums/images/graemlins/smile.gif

Henro in Pgh PA