Jim wrote
## why mess with screw in anchors ? Only power company’s + telco’s use
em. Even then
they use eggs in the EHS guys. A 40’ tall utlility pole is already 6
feet into the ground. No
anodes used.
## The rohn type rod anchors are in contact with the soil, where it is
trenched, so that portion
of the rod needs to be coated with roofing tar pitch. Those GAC series
anchor rods involve
excavating a huge hole, that is then trenched. The concrete slab needs to
be poured, then the
entire mess is bakfilled with dirt.
I reply...
They weren't screw anchors. They were the Rohn supplied anchors set in
concrete per the Rohn specifcations (as you describee) BUT they are still
vulnerable to corrosion. I have read dubious accounts of using tar on the
buried metal parts - the tar can fail and then the corrosion will be
concentrated in the failed areas
My opinion/guess is that the sacrificial anodes are a better way to go but
only time will prove me right or wrong.
Mark N1UK
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|