On 5/6/2011 8:37 PM, Al Williams wrote:
> ----- Original Message -----
> From: "Dick Green WC1M"<wc1m73@gmail.com>
>
> SNIP
>> As many have noted, it's hard to dig a perfect hole with a backhoe or
>> excavator. The hole always ends up larger than intended, especially after
>> you get in and square it up with a shovel. The pier wound up closer to
>> 4'x4'x6' and was more trapezoidal than rectangular (i.e., wider at the
>> base.)
> 1. Whys square the hole with a shovel? The only need might be to square
> up the visible part above the hole!
>
> 2. "...wider at the base."? I only have maybe 50 hours using my small
> BX22 backhoe but thats enough to know that the holes are always "wider at
> the top of the hole". This is because most backholes have two arms; the
> first attached to the low base of the tractor the arm then tilts up.
> The second arm attaches to the end of the first arm and tilts down to the
> ground. It is difficult to get the outer arm's bucket deep without the inner
> arm hitting the ground
Guy who dug my guy anchor holes did a beautiful job of getting the
square and a tad larger at the bottom at the extreme reach of the back hoe.
> Digging a straight down hole requires a lot of coordinated tractor moving
> toward/away from the hole while also changing both arm angles.
>
> 3. Readers contemplating having a deep, straight sided hole dug should
> find a contractor with a backhoe that has a telescoping/sliding arm mounted
> on the second (outer arm). This telescoping arm can dig straight vertical
> holes 8 or more feet deep.
>
Ya gets what yah pays for...hopefully.
73
Roger (K8RI)
> k7puc
>
>
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