[RE-wrenches] DPW concrete base

[Kevin Pegg]

Hi William, 

We have been recently exploring the idea of driven-pipe footings, or ground screws for small pole mounted solar arrays. I'd appreciate any lessons or experiences you have with this to share. 

Thanks, 

Kevin Pegg
EA Energy Alternatives Ltd. 
37471 Hwy 16 E
Telkwa, BC  V0J 2X2
250-846-9888
Http://www.EnergyAlternatives.ca 


-----Original Message-----
From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of William Miller
Sent: July-11-17 7:33 PM
To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Subject: Re: [RE-wrenches] DPW concrete base

Friends:

I always avoided structural engineering costs. We used recommended footings which were always oversized. 

However, as the cost of excavation, concrete and steel has increased, good engineering will pay for itself in reduction of all of the above. 

For example, we frequently avoid using excavation and concrete with driven-pipe footings. It's a huge savings in time and materials. 

William

> On Jul 11, 2017, at 6:03 PM, Hilton Dier <hiltondier at gmail.com> wrote:
> 
> We never did the calculation for pole mounts. We just used the biggest base size they listed and cast on an extra foot of depth in the form of a square footer. We figured that an extra half yard of concrete is cheap compared to the cost of the digging and form setting. The cost of a 36" sonotube instead of a 32" one is minimal. Peace of mind is priceless.
> 
> Hilton
> 
> Hilton Dier III
> Renewable Energy Design
> Missisquoi River Hydro LLC
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