[TowerTalk] Dimensions of a tower concrete base

[Scott MacKenzie]

Think of it as something preventing from over turning.  Deeper is always
better - you have more resistance from the soil reacting to the moment of
overturning.  The force would be the same, but the moment arm would be
longer resisting the overturning moment

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of Bert Almemo
Sent: Monday, September 01, 2008 11:51 PM
To: 'Bob Maser'; towertalk at contesting.com
Subject: Re: [TowerTalk] Dimensions of a tower concrete base

Hi Bob,

Thanks for your reply. Yes, I think you missed the point. Sorry! I'm talking
about the concept in principle not if the total weight is exactly the same.
According to the experts, the weight of the base has very little to do with
the support of the structure. The weight only makes up for about 10% of the
forces needed to support a given structure. 90% or so comes from the
soil/dirt/sand enclosing the base. I'm not an expert in structural
engineering and can't probably explain this properly.

Anyway, back to my question - in principle is there a difference in
force/strength to support a structure if the base is deeeper or shallower
having basically the same weight and volume?

73 Bert, VE3OBU



 

-----Original Message-----
From: Bob Maser [mailto:bmaser at tampabay.rr.com]
Sent: Monday, September 01, 2008 8:49 PM
To: Bert Almemo
Subject: Re: [TowerTalk] Dimensions of a tower concrete base

The last time I looked, 3x3x6=54 and 4x4x4=64 so 64 will weigh more than 54
will.  Am I missing something?

Bob W6TR
----- Original Message -----
From: "Bert Almemo" <balmemo at sympatico.ca>
To: <towertalk at contesting.com>
Sent: Monday, September 01, 2008 2:35 PM
Subject: [TowerTalk] Dimensions of a tower concrete base


> In general, is it better to go deep than wide when digging for a tower 
> base, i.e. does a deeper base give better support than a shallower one 
> with basically the same volume? Is 3x3x6 better than 4x4x4 with 
> everything else being equal. Thanks.
>
> 73 Bert, VE3OBU
>
>
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