I'd start by checking with an ARRL Volunteer Consulting Engineer.
The generic aluminum tower may be problematic if you do not have
specifications on the material.
BTW, I would never bury aluminum in concrete, find or make an
appropriate base section/stubs.
73,
... Joe, W4TV
On 2015-01-16 9:15 AM, bcarling@cfl.rr.com wrote:
Many thanks for the explanation, Joe.
In considering whether to forge ahead, do you have any suggetsions about
finding some help
making the claculations for this? It's a no name brand aluminum tower, 3
sections each 8
feet long. 2-3 feet woul dbe burie din concrete, and about 4 feet of HD steel
mast out the top.
Brian
On 16 Jan 2015 at 8:29, Joe Subich, W4TV wrote:
Seminole County, FL was 100 MPH based on the old "fastest mile"
standard. Without finding a new chart that uses "peak gust",
139 MPH would seem to be equivalent. Requiring the calculations
or a PE certification for building permit is within reason under
PRB-1.
73,
... Joe, W4TV
On 2015-01-16 7:50 AM, bcarling@cfl.rr.com wrote:
Greetings,
My local city Building Department wants me to prove that my proposed (24 foot)
tower
installation with a 3 element beam for 17m & 12m can withstand 139 mph winds
before they
will issue a permit.
Does this sound even remotely reasonable and compliant with PRB-1 ?
Thanks for your views - Brian Carling AF4K
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