Good info, thanks. I am in the midst of putting up a 100 foot tower near an instrument approach now. The slope will allow me to go up to 116 feet. I didn't know they added a fudge factor. Glad to have the warning. ----- Original Message ----- From: "Brian Webster" <[EMAIL PROTECTED]> To: "WISPA General List" <[email protected]> Sent: Friday, March 14, 2008 7:57 PM Subject: Re: [WISPA] tower install
> The FCC has certain standards when you file for a tower approval. Without > supplying a certified survey letter with your application, they will > automatically add 50 feet to your stated ground height to account for a > margin of error in your data reporting. That will put you at 250' which > you > will not get any waiver for unless you just happen to be next to a taller > structure that already has lighting and your position happens to be in > what > they call a shadow area. You can supply different certified survey letters > to minimize how much height they will add to your application. The > addition > of the height is because they assume your statement of ground elevation > has > a limited basis of accuracy. A 2C certification letter from a licensed > land > surveyor will have them add only 20 feet in height as that is the margin > of > vertical error in the 2C standard (Some FAA standard that I can't recall > off > the top of my head). If you get a 1A certification letter from a surveyor, > the margin of error is 3 feet vertically. That being said you could build > a > 196 foot tower and provide a 1A certification without lighting. In some > cases you may get the 200' total height (meaning a 197 foot tower) but I > would not count on it. Bottom line is that you want a 1A certification of > the ground elevation if you are pushing the limit like this. There are > other > special situations where they can exempt you from lighting but it would be > in cases such that you were building on a side hill and the hill was > taller > than your structure. > Now all of this assumes you are nowhere near any instrument approaches for > a runway. These can be as far as 10 nautical miles from the ENDPOINT of a > runway. Be careful using the TOWAIR check on the FCC web site. It only > runs > a test against the airport reference point which may be farther away from > your proposed tower than the end of any particular runway. Also keep in > mind > that the reviewing FAA officials can also impose additional restrictions > should they deem necessary. If you want my recommendation I would spend > $175 > with www.airspaceusa.com and have them run a full report on the site. Talk > with a man by the name of Clyde Pitman, he retired from the FAA with 26 > years and really knows his stuff. When you do file with the FAA send a > copy > of any reports he gives you. They all know him. I used to shave weeks off > my > tower filings because his reports did much of what they would have to do. > It's cheap insurance against any $50,000 fines, let alone having to take > your tower down. Also remember that while you are stacking a 200 foot > tower > the crane or Gin pole is supposed to have filed a temporary FAA approval > since they will be above the 200 foot mark, most tower companies miss > that. > It takes 4 to 6 weeks to get those so you need to plan well in advance. > > > > Thank You, > Brian Webster > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > Behalf Of Chuck McCown - 2 > Sent: Friday, March 14, 2008 6:03 PM > To: WISPA General List > Subject: Re: [WISPA] tower install > > > The FAA is a huge stickler about this. One guy got fined for being 16 > inches too tall, he thought he was under by a foot or so. I am very > interested in knowing if a waiver is even possible. > > ----- Original Message ----- > From: "Mike Goicoechea" <[EMAIL PROTECTED]> > To: "'WISPA General List'" <[email protected]> > Sent: Friday, March 14, 2008 9:36 AM > Subject: Re: [WISPA] tower install > > >> Mark, >> You make a great point. The owner did not understand all of the >> procedure. >> He thought it was just dig a whole pour concrete and lift the tower. We >> had >> planed on doing everything you mentioned. Plus he thinks he can get a >> waiver >> for not putting FAA lights on a 200 footer. We will see. >> >> >> >> Mike Goicoechea >> >> >> >> >> -----Original Message----- >> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On >> Behalf Of Mark Williams >> Sent: Friday, March 14, 2008 6:18 AM >> To: WISPA General List >> Subject: Re: [WISPA] tower install >> >> You should clarify that, >> they performing core samples, analysis, engineering the piers, forming, >> pouring, installing grounding system, and of course that >> their structurals are stamped by a state lic. engineering firm. >> >> -Mark Williams >> >> >> On Thu, 2008-03-13 at 12:08 -0500, Mike Goicoechea wrote: >> >>> We are installing a tower (super titian sc 100 200 foot) in east Texas. >>> We >>> have got a bunch of quotes from different companies. We have received >>> between $12,000-$24,000 for complete installation. Is that a normal >> amount? >>> >>> >>> >>> Mike Goicoechea >>> >>> >>> No virus found in this outgoing message. >>> Checked by AVG Free Edition. >>> Version: 7.5.516 / Virus Database: 269.21.7/1327 - Release Date: >>> 3/12/2008 >>> 1:27 PM >>> >>> >>> >>> >>> >> -------------------------------------------------------------------------- > -- >> ---- >>> WISPA Wants You! Join today! >>> http://signup.wispa.org/ >>> >> -------------------------------------------------------------------------- > -- >> ---- >>> >>> WISPA Wireless List: [email protected] >>> >>> Subscribe/Unsubscribe: >>> http://lists.wispa.org/mailman/listinfo/wireless >>> >>> Archives: http://lists.wispa.org/pipermail/wireless/ >> >> >> -------------------------------------------------------------------------- > -- >> ---- >> WISPA Wants You! 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