Pole building vs stepped block

[Overhaulin63]

Ok I think I am going with a pole building structure, but what about the concrete? Is the concrete more like to raise or have issues with a pole vs. a stepped top type block foundation where the concrete is supported by the block foundation?

 

[cj7jeep81]

My dad's pole building was built around '96 I think, and has had no issues with the floors at all, other than a couple of small cracks.

 

[astroracer]

If the site is prepped correctly, I.E. peel out the top soil, bring in sand and gravel and compact it to the specified thickness your location dictates, you should have no problem with the concrete.
The block wall doesn't support the slab by the way. The slab should float on the prepped substrate, just as it does with a pole building.
Mark

 

[joes169]

The block wall doesn't support the slab by the way. The slab should float on the prepped substrate, just as it does with a pole building.
Mark

I guess it depends on where you're at, but around these parts, as well as a large part of the country, the stem wall does indeed support the slab. Most frost walls have a slab ledge built into them, which is nothing more than a typical 2" transition form the top course to the course below. Here, in my locale, the most common approach is 5 courses of 8" wide block, with a 6" wide top course. the same thing is done with poured walls. Personally, I've never understood why someone would go through the effort and costs of a frost wall and emit the floor ledge when it's so darn easy to build............

 

[astroracer]

I agree to a point. The slab ledge is there but the slab is not connected directly to it. The slab will float on the compacted substrate. The ledge is only two or so inches wide and cannot support the entire slab.
In fact, in some builds here in Michigan, the ledge and frost wall are actually insulated with foam board and the slab is poured on top of that. The slab floats on the insulation.
Mark

 

[Overhaulin63]

Thanks guys!