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21. Re: [TowerTalk] Plumbing a tower (score: 1): Author: David Gilbert <xdavid@cis-broadband.com>; Date: Tue, 22 Jan 2008 10:12:27 -0700; Hi, Pete. I'm kind of sorry I even wrote my post now for the confusion it has apparently created, but just to clarify ... I was putting up a 70 foot AN Wireless self-supporting tower (model HD-70). I; /archives//html/Towertalk/2008-01/msg00470.html (11,389 bytes)
22. Re: [TowerTalk] Plumbing a tower (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Tue, 22 Jan 2008 09:16:27 -0800; It's probably important only if you're looking to get the design performance out of the system. If you're overdesigned or, alternately, running on the ragged edge and willing to tolerate failure, it; /archives//html/Towertalk/2008-01/msg00471.html (9,739 bytes)
23. Re: [TowerTalk] Plumbing a tower (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Tue, 22 Jan 2008 09:20:15 -0800; Out of curiosity, does the spec sheet or engineering drawings say how much deflection of the top one would expect at rated wind load? It might actually be more than a few inches. I've been at the top; /archives//html/Towertalk/2008-01/msg00472.html (9,325 bytes)
24. Re: [TowerTalk] Plumbing a tower (score: 1): Author: David Gilbert <xdavid@cis-broadband.com>; Date: Tue, 22 Jan 2008 10:49:05 -0700; I am now really, really, really sorry I brought all of this up. 1. I'm installing the 5 foot base section exactly as the manufacturer (AN Wireless) recommends. Check out the dozens of project photos; /archives//html/Towertalk/2008-01/msg00473.html (10,329 bytes)
25. Re: [TowerTalk] Plumbing a tower (score: 1): Author: David Gilbert <xdavid@cis-broadband.com>; Date: Tue, 22 Jan 2008 11:02:03 -0700; Not that I know of. I've never seen any deflection spec on the AN Wireless website, nor in the documentation I got for the tower. I bought the HD-70 model, though, and it is rated at 62 sq ft at 70 m; /archives//html/Towertalk/2008-01/msg00475.html (10,654 bytes)
26. Re: [TowerTalk] Plumbing a tower (score: 1): Author: "Kenneth R. Goodwin, Jr." <krgoodwin@comcast.net>; Date: Tue, 22 Jan 2008 13:04:32 -0600; My Rohn self supporting tower uses bolts for the base with nuts both below and above the first section footpads that allow alignment. I used a transit to plumb the tower and was very surprised to dis; /archives//html/Towertalk/2008-01/msg00477.html (8,704 bytes)
27. Re: [TowerTalk] Plumbing a tower (score: 1): Author: K7LXC@aol.com; Date: Tue, 22 Jan 2008 16:28:02 EST; only experience of this kind), the experienced tower builders who were helping me said absolutely nothing about plumbing the tower with any kind of instrument. When it was up and all three guy sets w; /archives//html/Towertalk/2008-01/msg00478.html (9,291 bytes)
28. Re: [TowerTalk] Plumbing a tower (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Tue, 22 Jan 2008 16:34:56 -0500; Frankly, specs like that strike me as implausible, or - perhaps worse - intended to give the tower manufacturer an "out" in any failure. For example, with Rohn 25, the guy spacing is approximately 30; /archives//html/Towertalk/2008-01/msg00479.html (9,685 bytes)
29. Re: [TowerTalk] Plumbing a tower (score: 1): Author: David Gilbert <xdavid@cis-broadband.com>; Date: Tue, 22 Jan 2008 14:51:38 -0700; Three inches out of 100 feet also requires an accuracy of 0.3 inches for a plumb bob string hung from a 10 foot section of tower. Three inches out of 100 feet calculates out to be a total angle of 0.; /archives//html/Towertalk/2008-01/msg00480.html (8,816 bytes)
30. Re: [TowerTalk] Plumbing a tower (score: 1): Author: "James Chaggaris" <jimc@pwrone.com>; Date: Tue, 22 Jan 2008 15:56:22 -0600; "When it was up and all three guy sets were Would have been easier if the owl was mounted on top first.... 73, Jim N9WW James E. Chaggaris President PowerOne Corp. 1020 Cedar Ave. Suite 110 St. Charl; /archives//html/Towertalk/2008-01/msg00481.html (11,152 bytes)
31. Re: [TowerTalk] Plumbing a tower (score: 1): Author: BobK8IA@aol.com; Date: Tue, 22 Jan 2008 17:03:20 EST; Three inches out of 100 feet also requires an accuracy of 0.3 inches for a plumb bob string hung from a 10 foot section of tower. Three inches out of 100 feet calculates out to be a total angle of 0.; /archives//html/Towertalk/2008-01/msg00482.html (9,286 bytes)
32. Re: [TowerTalk] Plumbing a tower (score: 1): Author: RICHARD SOLOMON <w1ksz@q.com>; Date: Tue, 22 Jan 2008 22:48:28 +0000; But I expect that like most digital instruments it is +/- 1 digit at the last digit, so a reading of 00.2 degree could actually be from 00.1 to 00.3 and still be in tolerance. And I thought the Timen; /archives//html/Towertalk/2008-01/msg00483.html (10,035 bytes)
33. Re: [TowerTalk] Plumbing a tower (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Tue, 22 Jan 2008 15:43:22 -0800; I note that Kurt Andress's evaluation of guyed towers shows typical deflections of 16" on a 100 ft tower. Now, that is a guyed tower, but it shows that the deflection under load could be substantiall; /archives//html/Towertalk/2008-01/msg00485.html (10,287 bytes)
34. Re: [TowerTalk] Plumbing a Tower (score: 1): Author: "Kenneth Goodwin" <krgoodwin@comcast.net>; Date: Wed, 28 Jul 2010 09:27:15 -0500; My self supporting tower may be a little different than a guyed tower but when I borrowed a transit to plumb my Rohn SSV tower, I was surprised to see that it was a lot like spaghetti. The sections l; /archives//html/Towertalk/2010-07/msg00626.html (7,383 bytes)
35. Re: [TowerTalk] Plumbing a Tower (score: 1): Author: Michael Goins <wmgoins@gmail.com>; Date: Wed, 28 Jul 2010 09:33:27 -0500; With a crank-up, I always just align the bottom section with a long (4'-6') level. The upper sections all leans some due to minor binding when up, cable tension, etc. With the one going up here (some; /archives//html/Towertalk/2010-07/msg00627.html (8,083 bytes)
36. Re: [TowerTalk] Plumbing a Tower (score: 1): Author: K7LXC@aol.com; Date: Wed, 28 Jul 2010 16:00:44 EDT; but when I borrowed a transit to plumb my Rohn SSV tower, I was surprised to see that it was a lot like spaghetti. The sections leaned in all directions. I ended up just aligning the very top of the; /archives//html/Towertalk/2010-07/msg00637.html (7,886 bytes)

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