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  #11  
Old 06-07-2013, 10:29 AM
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Agape Agape is offline
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Quote:
Originally Posted by DVS Hardscaper View Post
I did an estimate for a young man about 3 yrs ago. (I have a thread talking about this incident)

I pull up and it's a brand new house. He wanted a semi-elaborate patio. It involved alotta steps. I told him he really needed to wait an give the property time to settle. He became very agitated with me and could not wait for me to leave.

See, his neighbor just had a similar patio built. So because another contractor didn't blink an eye at doing it - Mr. Andrew Hardscape was full of himself.

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what happened to the neighbors patio?
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  #12  
Old 06-07-2013, 08:59 PM
PaperCutter PaperCutter is offline
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Just curious what y'all think of this. One of the masons I know will (on newly built homes) dig down to undisturbed soil and build up walls/piers to just below grade, pour a slab across them, and build off that slab. It sounds reasonable. Am I missing something?
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  #13  
Old 06-07-2013, 09:18 PM
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alldayrj alldayrj is offline
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Depending on the span between the piers, reinforcing and thickness of the slab I think it's just a bandaid until the slab cracks in the middle when that dirt settles out from under it. I see it all the time on a smaller scale when replacing stoops
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  #14  
Old 06-07-2013, 09:45 PM
PaperCutter PaperCutter is offline
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well yeah, it's concrete - no tensile strength without reinforcement. But I think adequately supported and reinforced, it sounds plausible.
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  #15  
Old 06-07-2013, 09:56 PM
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alldayrj alldayrj is offline
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Concretes not cheap any more. I'm paying 100/110 yard. I think it would be cheaper to excavate and compact in lifts
Wire mesh isn't enough to build a bridge which is what he is trying to do.
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  #16  
Old 06-08-2013, 06:50 AM
shovelracer shovelracer is offline
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Quote:
Originally Posted by PaperCutter View Post
Just curious what y'all think of this. One of the masons I know will (on newly built homes) dig down to undisturbed soil and build up walls/piers to just below grade, pour a slab across them, and build off that slab. It sounds reasonable. Am I missing something?
I see this all the time, and the key is undisturbed soil.
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  #17  
Old 06-08-2013, 10:02 AM
PaperCutter PaperCutter is offline
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I designed a garage several years ago and the floor had to be a structural slab, because there was 8' of grade change from where we met the existing driveway to where the back wall of the garage was, 24' away. So the walls of the garage went up, we backfilled with 57s, and laid the rebar and poured the slab. It was a thick slab and a beefy rebar schedule but it wasn't that exotic - and we were clear-spanning 20'+. I would have to think that if your pier spacing is reasonable and you get aggressive with rebar and slab thickness it would work.

What ooks me out is when I see guys pour a slab to support steps and they pin it to the foundation wall. Don't think I'd do that.
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  #18  
Old 06-08-2013, 12:44 PM
OSdb OSdb is online now
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Quote:
Originally Posted by PaperCutter View Post
I designed a garage several years ago and the floor had to be a structural slab, because there was 8' of grade change from where we met the existing driveway to where the back wall of the garage was, 24' away. So the walls of the garage went up, we backfilled with 57s, and laid the rebar and poured the slab. It was a thick slab and a beefy rebar schedule but it wasn't that exotic - and we were clear-spanning 20'+. I would have to think that if your pier spacing is reasonable and you get aggressive with rebar and slab thickness it would work.

What ooks me out is when I see guys pour a slab to support steps and they pin it to the foundation wall. Don't think I'd do that.
I think its just more common around NOVA, we use pier footings and dowels.
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  #19  
Old 06-08-2013, 09:56 PM
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SVA_Concrete SVA_Concrete is offline
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Originally Posted by PaperCutter View Post
well yeah, it's concrete - no tensile strength without reinforcement. But I think adequately supported and reinforced, it sounds plausible.
It is definitely plausible, you could run grade beams around the three sides and tie the beams into the foundation wall.

Superior walls puts haunches on the walls for lintels to bear on to facilitate the construction on a porch stoop prior to backfill even.
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  #20  
Old 06-10-2013, 09:51 PM
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DVS Hardscaper DVS Hardscaper is online now
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Quote:
Originally Posted by PaperCutter View Post
Just curious what y'all think of this. One of the masons I know will (on newly built homes) dig down to undisturbed soil and build up walls/piers to just below grade, pour a slab across them, and build off that slab. It sounds reasonable. Am I missing something?
Well sure it's very reasonable.

In Northern VA - people can afford to pay a contractor to go this route. There is MONEY in northern VA. Come further north into western MD and by the time the contractor factors in going this route - the client probably can't afford it.





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