I just left a meeting with the builder of our new steel home
where I discovered something troubling -- the steel roof and
wall materials appear to be floating above ground on top of
the concrete slab!
The roof and wall are 10" x 48" wide sections bonded together
and along the bottom of the wall set into a metal channel
fastened to the concrete with embedded anchor bolts -- but
those bolts are buried in the slab, none of them are grounded.
So when I bring everything to the entry panel the only point
of ground is the three planned 20' rods -- for the entire
steel house shell as well as for the power line, phone,
tower-related cables, and well cables.
I have been counting on the steel shell wicking off lightning
energy through multiple grounding points minimizing the collection
of energy at any single point.
Should I place ground rods at the corners, and perhaps at
additional 10 or 20 foot locations around the perimeter of the
60 x 40 structure, and tie them to the base plate of the
outer metal wall?
The lightning storm that just rolled through reminded me to take seriously!
Thanks! & 73, doc kd4e
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See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
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