Mikey - so, you added the stud frames before tilting the panels up and
this prevented them from breaking?
Could you post some pictures of the armatures that you use? I am
having a hard time picturing how this works exactly, but would love to
learn more.
Is pouring with rebar or other metal reinforcement a problem due to
shrinkage of the pc away from the metal?
Thanks!
Eli
--- In papercreters@yahoogroups.com, Mikey Sklar <sklarm-yahoo@...> wrote:
>
> The 4'x8'x4" panels I made had just enough strength to tilt up and
> flip over. After about 10 days of drying with no rain the panels
> seemed to be strong enough to add metal framing studs. Once the panels
> were incased in studs they could be put in place without concern for
> breaking them in transit. I had broken several panels during the tilt
> up process until I learned how to recognize when a panel was ready to
> flip and do it smoothly with two big levers. A PC mix rich in Portland
> and sand would have helped.
>
> As for slip forms I would not use them for walls above 5'. At that
> height or greater I make custom armatures out of 3/8" rebar, 6"x6"
> welded wire, and 2.5lb expanded metal lath.
>
> I have also built 8' high PC block walls, but that too I found too
> time consuming and labor intensive. The block wall results also came
> out quite sloppy due to poor craftsmanship on my part.
>
> On Aug 13, 2007, at 3:30 PM, "mountainfair" <yahooposting@...
> > wrote:
>
> > Can you tell me more about the strength - are you saying that they
> > lacked strength?
> >
> > I am OK working around long dry times, and have a stand in for a fork
> > lift that I could use to move large panels around with (might need to
> > figure out how to include loops sticking out of the panels to attach
> > chains to).
> >
> > But if strength is an issue, forget it. I was thinking of using
> > cattle panel (galvanized rod in roughly 6" squares maybe 1/4 inch dia)
> > in the middle.
> >
> > Did your 4x8 panels break?
> >
> > Arent you concerned with the weight of wet pc when the slip form is at
> > the top of the wall?
> >
> > -Eli
> >
> >
> >
> > --- In papercreters@yahoogroups.com, Mikey Sklar <sklarm-yahoo@>
> > wrote:
> >>
> >> I have some experience with tilt up 4'x8 panels. It is hard work
> >> and I
> >> doubt I would do it again despite the good looking fence I got out of
> >> the 60 panels that were made. The three problems with large tilt up
> >> panels I found were:
> >>
> >> 1. Moisture (long dry times)
> >> 2. Weight (minimum 2 people to move and place 150lb panels.
> >> 3. Strength (we reinforced with salt cedar as rebar inside the panel
> >> and framing studs on the outside.
> >>
> >> On future walls I will be building double armatures or make use of
> >> slip forms. Combined with a concrete pump or diaphragm pump I expect
> >> the work to be a order of magnitude faster.
> >>
> >> On Aug 13, 2007, at 4:39 AM, "mountainfair" <yahooposting@
> >>> wrote:
> >>
> >>> Thanks for your replies, Spaceman and Mikey. I am getting a better
> >>> picture of all that is involved. Sounds like spraying a
> >>> thicker/larger dome is not a good idea, but having a sprayer to put
> >>> the final coat/stucco on projects will be important.
> >>>
> >>> For larger projects, it sounds like casting on the ground would be
> >>> easier.
> >>>
> >>> Any experience casting large panels (like 8' or 10' x 20') and
> >>> tilt up
> >>> construction? If one could cast an entire wall on the ground, with
> >>> doors and windows framed in, this could save a lot of time and
> >>> energy.
> >>> Would need a loader/lift to pick it up, and some way of attaching
> >>> the
> >>> panels to the footer and perhaps a beam or something on top...
> >>> Would
> >>> love to hear if others have any experience with this.
> >>>
> >>>
> >>> -Eli
> >>>
> >>>
> >>>
> >>>
> >>> Yahoo! Groups Links
> >>>
> >>>
> >>>
> >>>
> >>
> >
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
>
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