Power line people do this all the time, but they have no-concrete
anchors with much more holding strength. Soil type will greatly affect
the anchor strength of screw-in anchors. Clay is good, sand is bad.
Power line pole anchors are installed with a machine which can test the
pull strength. SOMETIMES the local power company will put the anchors in
for you, at correct angle and rating. Nowadays this is becoming
increasingly rare- think liability and 'company policy'.
-de John NI0K
Edward Post III wrote on 7/24/2020 1:27 PM:
Designing my 2ndary tribander tower (large ish tribander e.g, JK Mid Tri 98lbs
16 sq ft or too big?) with 48' of 25G I now have.
Going to mount first section of 25G to small barn at 7-8', put some concrete
anchors in the 25G base and put 1 or 2 sets of guys at the appropriate levels
per Rohn catalog.
Question is can I get away with screw in anchors (e.g. Rohn GAS625 4' screw-in
anchor (DXE web site) or the like) for this use case or must I go with concrete
anchors per Rohn catalog to be safe?
2nd question, might utility pole anchors be better and if so where to source
and how best to get into soil with lots of rock .. what kind of machine if any?
Are there pros who do this?
Thanks in advance
Ed W2MKM
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