[RE-wrenches] Ballasted ground mount

[Zeke Yewdall]

Personally, I've never had much luck with pre-engineered stamped designs
from the manufacturers.  Aside from pole mounts, they all tend to stop at
way too low of tilt for my situations (I generally try for 45 to 55 degree
tilt, off grid and/or snow shedding).  So, I have tended to just design the
groundmount to my desires that's a modification of the normal manufacturer
ones with my own addditions and get a wet stamp for each project.  Usually
comes in under $400 with the engineer I've been using for years.  While
most of these end up with a sea of little concrete piers, he's also done
ones attached to a slab poured on top of the ground, to a layer of parking
lot bumpers, bolted to large rocks ("large" being 10' to entire mountain
size), and bolted to concrete beams poured on top of the ground.  Also, he
is very amenable to using driven ground anchors to add additional uplift
resistance (we are usually dealing with 170mph design wind load).  He
doesn't require a soil study to use those (probably just bases it off the
minimum pullout in sandy soil).

Getting anything done through permitting in a 2 week timeframe seems
difficult though...

Zeke



-- 
Zeke Yewdall
PV Engineer
NABCEP #031508-89
zeke at darkforestsolar.com
303-523-3592
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