[TowerTalk] Concrete Bin Blocks for Guy Anchors

[Charles Gallo]

That I can agree with. Do it like the plans, or get an engineer to do alternate plans

--  
73 de KG2V
Charlie

> On Dec 15, 2018, at 7:24 PM, terry burge <ki7m at comcast.net> wrote:
> 
> Just a little bit of concern from me. I'm not familiar with the concrete 'blocks' you are going to use. For my 117' Rohn 55 tower I used the 7-8' anchor rods that go in at an angle in the ground and planted a good 5' or so. They have a plate at the bottom that screws on and is meant to go up solid again undisturbed ground as a method for holding. Disturbed (dug up ground) is not to be trusted or so the explanations tell). In my case I carried 60# sacks of concrete (25-35) to the holes and poured them in with running the water hose enough to wet the pour down some. Not constant of course. Nothing fancy as far as mixing but it worked. To my SW anchor I added more sacks of concrete and the hole was a bit deeper due to the fact that our biggest wind storms come out of the SW (cyclones or whatever you want to call them out of the Pacific). Not usually real bad winds compared to a lot I've heard of but scary enough with 70-80-90 MPH winds. Four sets of guys on it in three directions every 120 degrees. 
> 
> Mine is a pretty substantia setup and I'd recommend you at least add a lot of concrete to the holes about 5-6' deep. 150' is a pretty substantial tower. If you want to see pictures check out my QRZ page.
> 
> Terry
> KI7M
> 
>> On December 15, 2018 at 4:01 PM Charles Gallo <charlie at thegallos.com> wrote:
>> 
>> 
>> I believe they do have rebar in them, but you might have cold seams too (if they don’t have enough spare concrete at the end of the day to make a full block. I could ask at work on Tuesday (next time I’m in the office). Trust me, I know we make a lot of them
>> 
>> --  
>> 73 de KG2V
>> Charlie
>> 
>>> On Dec 15, 2018, at 6:49 PM, <john at kk9a.com> <john at kk9a.com> wrote:
>>> 
>>> 150' of Rohn 55G tower is a pretty substantial structure and you do not want
>>> to skimp on one of the key components. To my knowledge there is no rebar in
>>> the premade blocks and I am guessing that the steel loops are designed just
>>> for transporting the blocks and not the thousands of pounds that can be
>>> created by guy cables.  Also even my 80' Rohn 55g tower has larger anchor
>>> slabs than one of these blocks.  
>>> 
>>> John KK9A
>>> 
>>> 
>>> KC8HZ wrote:
>>> 
>>> I've been thinking about guy anchors for a tower I'll be putting up next
>>> spring. The tower will be 150 feet of Rohn 55 and it will require 3 triple
>>> guys.
>>> Instead of poured concrete for the guy anchors I've been thinking about
>>> using some of those Concrete Bin Blocks which are 2'x2'x4'. I'd bury them
>>> and attach the guy ends to the steel loops imbedded into the blocks.
>>> Does anyone have thoughts on them ?
>>> 
>>> RoGrrr
>>> Roger
>>> KC8HZ
>>> Ohio
>>> 
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