what max thickness can a concrete shed base be?

[adiwill]

Hi all, after realising that my apparently easy corner shed base was not going to be so easy, i've come across a stumbing block.
It's on a slope, and as i started removing the old (smaller) shed base of pavers and sand, i realised the area and slope was bigger than i thought.
Basically, there's around 8-10 inches difference from the front to the back. So, my plan of sub base, mortar, and pavers is out of the window.

If i put the concrete on top of the sub base, how thick can it be? I'll obviously have to build a frame around it, but can it be 6-8 inches thick?
Pic below... it'll actually be another couple of inches above the string to allow for the door opening against the grass. The size is around 2.5mx2.5m .. excluding the corner cut out.

 

[scbk]

Seems kinda overkill, have you priced up the concrete? What is the shed going to be used for?

 

[freddiemercurystwin]

As above but in answer to the question as thick as you like.

 

[adiwill]

The shed is a corner summer house.. not much weight but it's on thick clay soil prone to moving.. hence the sub base really. I cant think of any other way other than concrete to get the height? I know i can use a wooden shed base on top of a thinner concrete base, but i want to avoid that just in case it doesn't work well with the shed.

 

[Mottie]

50 metres. Any more would be overkill.

 

[freddiemercurystwin]

You can use some concrete blocks on their side or similar.

 

[freddiemercurystwin]

50 metres. Any more would be overkill.

50 metres?

 

[Mottie]

50 metres?

Yep. Max. As per the thread title.

 

[freddiemercurystwin]

Why would a concrete base be restricted to 50m thick?

 

[Dereekoo]

Why would a concrete base be restricted to 50m thick?

To keep carbon footprint within acceptable parameters?

 

[Mottie]

Why would a concrete base be restricted to 50m thick?

As above but in answer to the question as thick as you like.

What if he wants 100m thick?

 

[freddiemercurystwin]

I think the Hoover dam is about 200m high.

 

[Eccles]

Didn't use concrete for my last shed built from scratch just laid a suitable number of "pressure treated" timbers on the dirt and checked that they were more or less level with a one metre spirit level. Did the same recently for a small greenhouse. After all a shed does not need to pass building regs so who cares if it ain't quite level.

 

[adiwill]

for the thickness, i was thinking more of the likelihood of cracking the thicker it is Specifically as it's going to be sitting on top of the soil level,rather than being built below it, so no support on the sides as such other than the frame used to build it.
I'm capable of doing it, just don't know that much about concrete

 

[Eccles]

Concrete always cracks eventually in my experience not that it matters for a shed base I suppose.