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sailawayrb
Veteran Member
Posts:2274
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| 30 Sep 2014 10:34 AM |
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Good to hear and know Smartwall.
If concrete buildings/structures are designed/constructed to the right structural specification and maintain their structural strength to this specification, all will be very well and they will last for centuries. However, there have been several spectacular failures of concrete buildings/structures involving rebar that failed from corrosion, so it isn’t just Helix that one needs to be concerned about.
We use basalt rebar for many of our water work projects where corrision is a high risk (e.g., small dams, fish screen by-pass tanks, hydro turbine concrete cases, etc). One really just needs to use the right product for the given application. Most buildings shouldn't have a corrosion risk and we expect that Helix will prove to be great for this application.
However, parking garages and bridges are another matter... |
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| Borst Engineering & Construction LLC - Competence, Integrity and Professionalism are integral to all that we do! |
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Eldon Howe
New Member
Posts:8
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| 23 Dec 2014 12:31 PM |
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Vibrators are not
always necessary, but you should have on on the walk boards ready at
all times.
We use a 1.5”
oztec in most pours.
Here is a You tube
link of a 12"/12" pitched ICF roof where we used this vibrator.
http://YouTube/qqIDK6P2TXU
You can turn down
the sound on this video. |
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robinnc
Advanced Member
Posts:586
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| 23 Dec 2014 07:24 PM |
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The link doesn't work.
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Lbear
Veteran Member
Posts:2740
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| 23 Dec 2014 08:05 PM |
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Posted By Eldon Howe on 23 Dec 2014 12:31 PM
Vibrators are not
always necessary, but you should have on on the walk boards ready at
all times.
We use a 1.5”
oztec in most pours.
What slump & psi do you use? |
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sailawayrb
Veteran Member
Posts:2274
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| 23 Dec 2014 08:15 PM |
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Oh boy...here we go again... |
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| Borst Engineering & Construction LLC - Competence, Integrity and Professionalism are integral to all that we do! |
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Eldon Howe
New Member
Posts:8
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| 24 Dec 2014 03:30 PM |
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This link should
work. It came directly off the You tube video.
http://youtu.be/qqIDK6P2TXU
These ICF roofs are
engineered so we adhere to the specifications.
The roof in the
video was a 7” slump with water reducer added not water to 4,000
psi concrete with Helix for crack control.
We have used other
mixes as well.
I posted this
because of the question about sloped ICF roofs and vibrators.
I know most ICF
builders are not on board with this technique of building concrete
roofs yet, Just as most wood frame builders knock ICF. Hopefully we
all can move forward and build even better structures. |
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woulfcc
Basic Member
Posts:147
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| 24 Dec 2014 07:23 PM |
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Awesome Eldon just assume....
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| Changing How the World BUILDS!<br>Green , Done , Easy<br>Woulf c.c. of Wisconsin |
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Jelly
Veteran Member
Posts:1017
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| 27 Dec 2014 12:06 PM |
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Beautiful structure. I was surprised at how light the bracing system seemed to be under the roof during the pour. So how does the underside of the roof get finished out? Do those steel joists get covered with sheetrock, and does anything happen in that space, like just the usual ductwork, wiring, et cetera? |
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billnaegeli
Basic Member
Posts:166
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| 27 Dec 2014 12:29 PM |
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Hi Eldon,
great vid worked fine for me, what was the core thickness, IntegraSpec has 4", 5" or 6" core?
we need to do more of this type of structure, just makes sense with ICF Walls, the SpeedFloor joists was a masterpiece idea with IntegraSpec...master piece from the master! haha great job!
talk soon, Happy New Year! |
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GNP Inc
ICF Construction & Concrete Services
1-800-713-7663 |
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Eldon Howe
New Member
Posts:8
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| 27 Dec 2014 12:36 PM |
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In this house we
used Speed Floor Joist. You could also use Hambro Etc.
In between the joist
is a removable steel Lock bar that secures each joist and becomes the
shoring for the bottom side of the ICF. No additional shoring is
needed. After the placement of concrete the lock bars are removed and
wood or metal furring strips are attached to the speed floor joist
and drywall is screwed on.
The space can be
used for utilitys. |
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Lbear
Veteran Member
Posts:2740
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| 27 Dec 2014 12:48 PM |
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Posted By Eldon Howe on 24 Dec 2014 03:30 PM
I posted this
because of the question about sloped ICF roofs and vibrators.
I know most ICF
builders are not on board with this technique of building concrete
roofs yet, Just as most wood frame builders knock ICF. Hopefully we
all can move forward and build even better structures.
Looks like a very windy location, great location for a concrete home, it should be very quite with the concrete walls and roof. What is the price of an ICF roof? Typically here in the US, depending on market area, the cost of ICF walls per square foot (including doors and windows) runs in the $12-$15 range. From what I read, concrete ICF roofs run in the $23-$27 range. This is OTD pricing (forms, labor, shoring, rebar, concrete, etc). |
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Jelly
Veteran Member
Posts:1017
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| 28 Dec 2014 12:04 PM |
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That's what I always hear/read, that ICF roofs are so expensive that they are never even considered. But I don't really get why they should be that much more expensive than ICF walls. |
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jonr
Senior Member
Posts:5341
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| 28 Dec 2014 01:31 PM |
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I would guess the steel used in the forms and the shoring needed. |
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Eldon Howe
New Member
Posts:8
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| 29 Dec 2014 03:29 PM |
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That's Right, a 4"
ICF form is used. so 12.00 to 15.00 or so for the ICF cost, remember
this is not on a deck but up in the air. The remainder of the cost
will be for a center beam, be it concrete or I beam and the speed
floor/ hambro joist and installation.
The steel joist span from
Concrete wall to the center beam at the roof ridge. No additional
shoring is needed other than the lock bars.
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robinnc
Advanced Member
Posts:586
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| 30 Dec 2014 07:50 PM |
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Are you saying that the price of an ICF roof 'includes' all of the steel to hold it up? Like I beams?
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Eldon Howe
New Member
Posts:8
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| 07 Jan 2015 06:07 PM |
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Cost to build a total icf roof $23.00 to $27.00 per square feet is usually just the roof. But if a short span center ridge beam is used then yea. The steel I beams used in the video were both over 30' long, so the I beams were additional cost. |
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Jelly
Veteran Member
Posts:1017
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| 07 Jan 2015 07:24 PM |
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Posted By Eldon Howe on 07 Jan 2015 06:07 PM
...the I beams were additional cost...
They looked like C-joists to me, were they really I-beams? |
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Eldon Howe
New Member
Posts:8
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| 09 Jan 2015 11:16 AM |
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The ridge beam in the video is a steel I beam.
The steel rafters are "Speed floor" composite floor joist. Speed floor joist have a S bend on the top of the joist and a triangle bend on the bottom of the joist. The S bend on the top of the joist is cast into the 4" concrete roof and the triangle bend on the bottom is used for attaching the ceiling to. |
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