[TowerTalk] Concrete for tower base

[Art Greenberg]

Thanks Dave.

Well, I am taking the instructions rather literally, I guess. Maybe too much so?

Now that I am looking again ... I have an older copy of the instructions from the TriEx days that shows the base 6 inches above the concrete on one page and 16 inches on another. I was stuck on the 6 inch measurement. A newer version of the instructions shows 16 inches in all of the drawings, so yeah, that's probably more like it.

The instructions show the cross members fastened using the lowest holes in the base. Raising the cross members and using some of the holes up higher to allow for troweling looks like it should definitely work, even if I used something bigger than the 1x4 specified.

So .... nevermind. LOL.

-- 
Art Greenberg
art at artg.tv

On Tue, Nov 12, 2019, at 15:39, David Gilbert wrote:
> 
> Why not just add some vertical lumber screwed to the outside of the form 
> to raise the base-supporting lumber high enough to trowel underneath 
> it?   The tower base extends 16 inches above the finished concrete so I 
> don't see the problem.  If you need more clearance than could be had 
> with wood for the horizontal portion that holds the tower base, use some 
> steel angle stock ... such as this:
> 
> https://www.lowes.com/pd/Hillman-1-1-2-in-W-x-1-1-2-in-H-x-6-ft-L-Zinc-Plated-Steel-Perforated-Slotted-Angle/3059263
> 
> 73,
> Dave   AB7E
> 
> 
> On 11/12/2019 12:55 PM, Art Greenberg wrote:
> > I'm putting up a tower soon, and I have questions about working with concrete.
> >
> > The tower will the a Tashjian WT-51.
> >
> > The hole is 2.5ft x 2.5ft, 5.5ft deep and the concrete extends 6 inches above grade for a total foundation height of 6ft. The instructions for the tower base call for it to be suspended in the hole while the concrete is poured. The instructions show a form around the top of the hole and additional lumber is used to suspend the base, sitting on top of the form. The concrete is to be poured to level with the top of the form, which means its just touching the underside of the lumber used to suspend the base. So the presence of the lumber suspending the base in the hole will be in the way of fully finishing the top of the concrete.
> >
> > (a) How long do I have before the top surface of the pour cures too much to permit fully working the finish?
> >
> > (b) How long should I allow the concrete to cure before I remove the lumber suspending the tower base?
> >
> > Thanks.
> >
> 
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