[TowerTalk] Square Hole or Round Hole for Self Supporter?
jimlux at earthlink.net
Sat Jan 20 17:59:00 EST 2018
On 1/20/18 11:01 AM, Richard Thorne wrote:
> I have an HDX-589. I'm in the planning stages for getting the tower
> I ran across a driller yesterday that can drill the 10' deep hole to a
> diameter of 7' (87" to be exact).
> We have excellent soil here for self supporting towers, caliche. Digging
> by hand is out and using a back hoe would probably make an over size hole.
> Is there a reason not to use a cylinder vs a square hole?
Nope.. Here in Southern California, there's a big business in drilling
holes to be used as foundations for things like traffic lights (huge
bending moment) - you can drill a 4 foot diameter 20 foot deep hole
where the sidewalk is, lower a rebar cage in, and fill it with concrete
to make a very solid pier for the traffic light to bolt to.
The whole "cube" is mostly because it's easy to dig by hand/backhoe, and
easy to calculate.
More information about the TowerTalk