[TowerTalk] deep base for MA-550

[Jim Rhodes]

No, the hole his engineer recommended was 2 ft in diameter & 25 ft deep.

"I passed this by my soils engineer, who's recommending a different
design -- drill a 2' hole with an augur, 25' deep."

At 08:21 PM 10/4/03, Jerry Keller wrote:
>You may be right for a cylinder....but he said 2.5 x 2.5 x 5.... that's 
>not a cylinder.  Still, the calcs (1.157 vs 1.25) are not that much 
>different. :-)  Jerry K3BZ
>   ----- Original Message -----
>   From: FireBrick
>   To: Jerry Keller ; gdaught6 at stanford.edu ; towertalk at contesting.com ; 
> Jim Rhodes
>   Sent: Saturday, October 04, 2003 9:01 PM
>   Subject: Re: [TowerTalk] deep base for MA-550
>
>
>   I can't do that fancy math.
>   But as a retired mason contractor...I can use a concrete calculating slide
>   rule.
>   (The redimix outfits used to hand them out free and you may ask your
>   supplier, they may give you one)
>   But...
>   having said that,
>   My calculator says that a 2"6" diameter pier, 5' deep would be 1 1/4 yards.
>
>   (we used to figure, 6 wheelbarrows to a yard for how much pushing would be
>   required)
>
>
>   ----- Original Message -----
>   From: "Jerry Keller" <k3bz at arrl.net>
>   To: <gdaught6 at stanford.edu>; <towertalk at contesting.com>; "Jim Rhodes"
>   <k0xu at iowadsl.net>
>   Sent: Saturday, October 04, 2003 7:40 PM
>   Subject: Re: [TowerTalk] deep base for MA-550
>
>
>   There are 27 cu ft in 1 cu yd (3 ft x 3 ft x 3 ft)...so 2.5 ft x 2.5 ft x
>   5.0 ft = 31.25 cu ft... divided by 27 cu ft = 1.157 cu yd.  Jerry K3BZ
>     ----- Original Message -----
>     From: Jim Rhodes
>     To: gdaught6 at stanford.edu ; towertalk at contesting.com
>     Sent: Saturday, October 04, 2003 8:19 PM
>     Subject: Re: [TowerTalk] deep base for MA-550
>
>
>     Hold on here. Isn't the formula pi*r^2*h=v? My calc says about 78.5 cu ft
>     or 2.9 cu yds.
>
>     Oh, I'm sorry. I just noticed the @stanford.edu.
>
>     At 05:18 PM 10/4/03, gdaught6 at stanford.edu wrote:
>     >On 4 Oct 2003 at 11:47, David Giuliani wrote:
>     >
>     > > I'm installing a concrete base for a Universal Towers MA-550.  The
>     > > mfg's dwg calls for a base 2.5' x 2.5' x 5' deep in undisturbed soil,
>     > > using 2.5 cubic yards.
>     >
>     >I calculate under 1.25 cubic yards for that hole.  You're going to
>     >have a LOT of concrete left over.  3' x 3' x 6' is two yards.
>     >
>     >73,
>     >
>     >
>     >
>     >
>     >_______________________________________________
>     >
>     >See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless
>     >Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with
>     >any questions and ask for Sherman, W2FLA.
>     >
>     >_______________________________________________
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>
>     Jim Rhodes K0XU
>     jim at rhodesend.net
>     _______________________________________________
>
>     See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless
>   Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any
>   questions and ask for Sherman, W2FLA.
>
>     _______________________________________________
>     TowerTalk mailing list
>     TowerTalk at contesting.com
>     http://lists.contesting.com/mailman/listinfo/towertalk
>   _______________________________________________
>
>   See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless
>   Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any
>   questions and ask for Sherman, W2FLA.
>
>   _______________________________________________
>   TowerTalk mailing list
>   TowerTalk at contesting.com
>   http://lists.contesting.com/mailman/listinfo/towertalk
>
>
>_______________________________________________
>
>See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless 
>Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with 
>any questions and ask for Sherman, W2FLA.
>
>_______________________________________________
>TowerTalk mailing list
>TowerTalk at contesting.com
>http://lists.contesting.com/mailman/listinfo/towertalk

Jim Rhodes K0XU
jim at rhodesend.net