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That should be fine, IIRC - 50m & 100m aren't unheard of.
When I did the calculations, the tipping point was a relatively small slab. Smaller, when you factor in how much I couldn't be fucked to mix that much concrete.
With a pour, you may also get someone with the rest of the tools, like the vibrateywand, and a proper floatythings.
@Hovis has recent-ish experience of domestic roasdside pours.
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I had mine pumped from the street to the back of my garden, the line was about 50m. They moaned about the length when they got here, I think above 50m and they start to charge extra.
Mine was 6m x 4m, 150mm thick. Your size I'd be tempted to DIY it if you have the time.
For the sake of £25 or so for a sheet of steel mesh, I'd be tempted to chuck one in, it really does strengthen the concrete and helps prevent cracking
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NotThamesWater
Hovis
@stevo_com
More not gardening.
I'll (hopefully) soon need to think about shed footings. I will maybe need a 17'x9' slab poured. It will be about 100' from the road but we do have access down the side of the house. Can concrete be pumped that far or would it be better just to get someone with a mixer in to do it on site? I don't have the time nor the inclination to be spending all day mixing and pouring myself. Wondering where the tipping point is in terms of cost for pumped vs labour.
Also, if it's for a shed, is it worth chucking rebar in or would a plain slab be OK? My last shed was only 8'x6' and sat on 9'x7'x6" of unreinforced concrete for 5 years with no issues.