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| HockeyFan 2007-02-12, 5:25 pm |
| I'm curious what most people do to prevent rebar from sinking into the
dirt as pressure is applied during the pour (especially with workers
stomping over it during the pour).
I know about the TieBrick product, and interested how many use that,
but also about what most do to insure that the rebar remains at the
depth in the concrete as intended.
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| Michael Bulatovich 2007-02-12, 5:25 pm |
|
"HockeyFan" <les.stockton@gmail.com> wrote in message
news:1171314482.334499.77040@k78g2000cwa.googlegroups.com...
> I'm curious what most people do to prevent rebar from sinking into the
> dirt as pressure is applied during the pour (especially with workers
> stomping over it during the pour).
> I know about the TieBrick product, and interested how many use that,
> but also about what most do to insure that the rebar remains at the
> depth in the concrete as intended.
Use rebar chairs
--
MichaelB
www.michaelbulatovich.ca
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| Steve Barker 2007-02-12, 5:25 pm |
| Flat workers pull the rebar up into the pour as they go.
--
Steve Barker
"HockeyFan" <les.stockton@gmail.com> wrote in message
news:1171314482.334499.77040@k78g2000cwa.googlegroups.com...
> I'm curious what most people do to prevent rebar from sinking into the
> dirt as pressure is applied during the pour (especially with workers
> stomping over it during the pour).
> I know about the TieBrick product, and interested how many use that,
> but also about what most do to insure that the rebar remains at the
> depth in the concrete as intended.
>
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|
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"Steve Barker" <ichasetrains@some.yahoo.com> wrote in message
news:h8mdnfoIluZ0eE3YnZ2dnUVZ_u6rnZ2d@giganews.com...
> Flat workers pull the rebar up into the pour as they go.
>
> --
> Steve Barker
>
Flat workers *are supposed* pull the rebar up into the pour as
they go. [g]
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| marson 2007-02-12, 5:25 pm |
| On Feb 12, 4:20 pm, "Glenn" <pilc...@kc.rr.com> wrote:
> "Steve Barker" <ichasetra...@some.yahoo.com> wrote in message
>
> news:h8mdnfoIluZ0eE3YnZ2dnUVZ_u6rnZ2d@giganews.com...> Flat workers pull the rebar up into the pour as they go.
>
>
> Flat workers *are supposed* pull the rebar up into the pour as
> they go. [g]
we use concrete bricks ("dobies)
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| Michael Bulatovich 2007-02-12, 5:25 pm |
|
"Steve Barker" <ichasetrains@some.yahoo.com> wrote in message
news:h8mdnfoIluZ0eE3YnZ2dnUVZ_u6rnZ2d@giganews.com...[color=darkred]
> Flat workers pull the rebar up into the pour as they go.
>
> --
> Steve Barker
>
> "HockeyFan" <les.stockton@gmail.com> wrote in message
> news:1171314482.334499.77040@k78g2000cwa.googlegroups.com...
What's a "flat worker" and where is that expression used?
--
MichaelB
www.michaelbulatovich.ca
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| DAvid Norris 2007-02-12, 8:25 pm |
| Michael Bulatovich wrote:
> "Steve Barker" <ichasetrains@some.yahoo.com> wrote in message
> news:h8mdnfoIluZ0eE3YnZ2dnUVZ_u6rnZ2d@giganews.com...
>
"flat workers" those are the drunks after the pour
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| Bob Morrison 2007-02-13, 3:25 am |
| In a previous post Steve Barker wrote...
> Flat workers pull the rebar up into the pour as they go.
>
That may be true for welded wire mesh, but not for actual bars. Bars are
supposed to supported on chairs or masonry blocks made for the purpose,
commonly called "dobies" as "marson" posted in his message.
--
Bob Morrison, PE, SE
R L Morrison Engineering Co
Structural & Civil Engineering
Poulsbo WA
bob at rlmorrisonengr dot com
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|
| Don't ever depend on finishers to pull up rebar, it is impossible
once the concrete is on it, and architecturally supervised pours
will not allow it. Sand chairs are difficult to keep in position,
most everyone uses concrete brick.
--
~~~~~~~~~~~~~~~~~~~~
DanG
A live Singing Valentine quartet,
a sophisticated and elegant way to say I LOVE YOU!
valentine@okchorale.org (local)
http://www.singingvalentines.com/ (national)
"HockeyFan" <les.stockton@gmail.com> wrote in message
news:1171314482.334499.77040@k78g2000cwa.googlegroups.com...
> I'm curious what most people do to prevent rebar from sinking
> into the
> dirt as pressure is applied during the pour (especially with
> workers
> stomping over it during the pour).
> I know about the TieBrick product, and interested how many use
> that,
> but also about what most do to insure that the rebar remains at
> the
> depth in the concrete as intended.
>
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|
|
"Bob Morrison" <SpamFighter@junk.com> wrote in message
news:MPG.203ad85ba416673a989d55@news.west.earthlink.net...
> In a previous post Steve Barker wrote...
>
> That may be true for welded wire mesh, but not for actual bars. Bars are
> supposed to supported on chairs or masonry blocks made for the purpose,
> commonly called "dobies" as "marson" posted in his message.
>
> --
> Bob Morrison, PE, SE
> R L Morrison Engineering Co
> Structural & Civil Engineering
> Poulsbo WA
> bob at rlmorrisonengr dot com
Even if wire mesh gets pulled up by the flat worker he will only step on it
and push it back down when screeding.
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| Michael Bulatovich 2007-02-13, 9:25 am |
|
"Don" <rath2@comcast.net> wrote in message
news:UeednUugFspRJ0zYnZ2dnUVZ_smonZ2d@comcast.com...
>
> "Bob Morrison" <SpamFighter@junk.com> wrote in message
> news:MPG.203ad85ba416673a989d55@news.west.earthlink.net...
>
> Even if wire mesh gets pulled up by the flat worker he will only step on
> it and push it back down when screeding.
Not if they have X-ray vision and 4"x4" feet...
There's an amazing 'spit' here in Toronto made mainly of construction
detritus, and it's a 'little sop of horrors' if you like to see reinforcing
steel where the drawings say it should be. Chunk after chunk have the steel
substantially out of place. Even the easy parts like columns.
http://tinyurl.com/pl6tz
http://en.wikipedia.org/wiki/Leslie_Street_Spit
--
MichaelB
www.michaelbulatovich.ca
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| Michael Bulatovich 2007-02-13, 9:25 am |
| I've never seen the brick used. Is it for work on grade only? Are they
typical 'concrete bricks' or a special, smaller product?
--
MichaelB
www.michaelbulatovich.ca
"DanG" <dgriff23@7cox.net> wrote in message
news:x9bAh.34250$IL1.30268@newsfe13.lga...
> Don't ever depend on finishers to pull up rebar, it is impossible once the
> concrete is on it, and architecturally supervised pours will not allow it.
> Sand chairs are difficult to keep in position, most everyone uses concrete
> brick.
>
> --
> ~~~~~~~~~~~~~~~~~~~~
> DanG
> A live Singing Valentine quartet,
> a sophisticated and elegant way to say I LOVE YOU!
> valentine@okchorale.org (local)
> http://www.singingvalentines.com/ (national)
>
>
> "HockeyFan" <les.stockton@gmail.com> wrote in message
> news:1171314482.334499.77040@k78g2000cwa.googlegroups.com...
>
>
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| Michael Bulatovich 2007-02-13, 9:25 am |
| You're going in circles. Is 'flatwork' slab work, as opposed to columns or
walls?
--
MichaelB
www.michaelbulatovich.ca
"Steve Barker" <ichasetrains@some.yahoo.com> wrote in message
news:zeednYV-gZUjgEzYnZ2dnUVZ_tmknZ2d@giganews.com...
> Someone who does flatwork. The expression is used whenever discussing
> flatwork or flatworkers.
>
> http://www.nrmca.org/aboutconcrete/cips/14p.pdf
>
> http://www.denvermobileconcrete.com/
>
>
> --
> Steve Barker
>
>
> "Michael Bulatovich" <Please@dont.try> wrote in message
> news:eqqq1001kp5@news1.newsguy.com...
>
>
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| Steve Barker 2007-02-13, 9:25 am |
| yes
--
Steve Barker
"Michael Bulatovich" <Please@dont.try> wrote in message
news:eqsgbr013h1@news5.newsguy.com...
> You're going in circles. Is 'flatwork' slab work, as opposed to columns or
> walls?
> --
>
>
> MichaelB
> www.michaelbulatovich.ca
>
| |
| Bob Morrison 2007-02-13, 1:25 pm |
| In a previous post Michael Bulatovich wrote...
> I've never seen the brick used. Is it for work on grade only? Are they
> typical 'concrete bricks' or a special, smaller product?
> --
>
Michael:
Here's a link to a fancy style "dobie". Note that it has tie wires to
hold the rebar in place. Most times the block is just plain.
http://www.forshor.com/accessories/...port.html#wired
--
Bob Morrison, PE, SE
R L Morrison Engineering Co
Structural & Civil Engineering
Poulsbo WA
bob at rlmorrisonengr dot com
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| Michael Bulatovich 2007-02-13, 1:25 pm |
|
"Bob Morrison" <SpamFighter@junk.com> wrote in message
news:MPG.203b787ce9c3a4a7989d56@news.west.earthlink.net...
> In a previous post Michael Bulatovich wrote...
>
> Michael:
>
> Here's a link to a fancy style "dobie". Note that it has tie wires to
> hold the rebar in place. Most times the block is just plain.
>
> http://www.forshor.com/accessories/...port.html#wired
>
> --
> Bob Morrison, PE, SE
> R L Morrison Engineering Co
> Structural & Civil Engineering
> Poulsbo WA
> bob at rlmorrisonengr dot com
I've seen those! Thanks, Bob.
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| Matt Whiting 2007-02-13, 9:25 pm |
| Bob Morrison wrote:
> In a previous post Michael Bulatovich wrote...
>
>
>
> Michael:
>
> Here's a link to a fancy style "dobie". Note that it has tie wires to
> hold the rebar in place. Most times the block is just plain.
>
> http://www.forshor.com/accessories/...port.html#wired
>
Bob, I've seen these used before and always wondered how much they
weaken the slab. Do they bond pretty well to the concrete? I suppose
if the slab is well supported the lose in bending strength shouldn't be
a big deal, but it does seem as though the dobies would cause a fair
loss in the ability of the slab to resist a positive bending moment in
that area.
Matt
| |
| Bob Morrison 2007-02-13, 9:25 pm |
| In a previous post Matt Whiting wrote...
> Bob, I've seen these used before and always wondered how much they
> weaken the slab. Do they bond pretty well to the concrete? I suppose
> if the slab is well supported the lose in bending strength shouldn't be
> a big deal, but it does seem as though the dobies would cause a fair
> loss in the ability of the slab to resist a positive bending moment in
> that area.
>
Not really. The blocks are only a few inches long. The rebar in the area
is anchored on either end of the block by embedment in the slab.
Think of it this way: the rebar works even if there is no concrete at the
middle of a beam as long as it is anchored on the ends. The sections are
assumed to be cracked (no concrete) at ultimate design strength. In
elevated beams the main reason for the bottom concrete is aesthetics and
to protect the rebar from corrosion. A similar thing is true for slabs on
grade.
--
Bob Morrison, PE, SE
R L Morrison Engineering Co
Structural & Civil Engineering
Poulsbo WA
bob at rlmorrisonengr dot com
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