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1. [TowerTalk] Tower concerns (score: 1): Author: ae4mr@arrl.org (Dave Armbrust); Date: Fri, 12 Jan 2001 13:20:26 -0500; I am in the process of putting up a tower and I have some concerns that I hope the group can help me with. The tower is currently 55' of Rohn 45. 5 straight sections and 1 top section. The bottom sec; /archives//html/Towertalk/2001-01/msg00306.html (10,730 bytes)
2. [TowerTalk] Tower concerns (score: 1): Author: ae4mr@arrl.org (Dave Armbrust); Date: Fri, 12 Jan 2001 15:13:42 -0500; Hank, I am not quite following your calculation of 50,000 lb-ft of moment. Perhaps you can explain. What I come up with is .00256 x 110 MPH squared x 1.2 (round members) x 9.7 SF x (60'-15') (above b; /archives//html/Towertalk/2001-01/msg00308.html (14,452 bytes)
3. [TowerTalk] Tower concerns (score: 1): Author: ae4mr@arrl.org (Dave Armbrust); Date: Fri, 12 Jan 2001 17:32:20 -0500; The bracket is over designed as much as I could. Where it attaches to the house it is 5' long and it has three bolts that go through vertical 2x4. I have this backed up with a horizontal 2x4. All of; /archives//html/Towertalk/2001-01/msg00311.html (24,724 bytes)
4. [TowerTalk] Tower concerns (score: 1): Author: ae4mr@arrl.org (Dave Armbrust); Date: Sat, 13 Jan 2001 02:44:03 -0500; Hank, Thanks for all your help on my tower. I really appreciate it as I am trying to do this right. In my area amateurs are exempt from the tower ordinance thanks to the efforts of the local hams and; /archives//html/Towertalk/2001-01/msg00319.html (24,019 bytes)
5. [TowerTalk] Tower concerns (score: 1): Author: ae4mr@arrl.org (Dave Armbrust); Date: Sat, 13 Jan 2001 17:46:44 -0500; I have had several E-Mail from many individuals most of them private. One item that I did mention is that I was using a formula from chapter 22 of the ARRL antenna book for antenna masts. Since this; /archives//html/Towertalk/2001-01/msg00333.html (12,380 bytes)
6. [TowerTalk] Tower concerns (score: 1): Author: ae4mr@arrl.org (Dave Armbrust); Date: Tue, 16 Jan 2001 14:01:21 -0500; Steve, Stop and think about what you are saying. You seem to be stating that this can be done in a couple of hours! For this two hour service Rohn charges $3,000 plus $300 per hour or approximately $; /archives//html/Towertalk/2001-01/msg00410.html (11,746 bytes)
7. Re[2]: [TowerTalk] Tower concerns (score: 1): Author: ae4mr@arrl.org (Dave Armbrust); Date: Wed, 17 Jan 2001 13:48:53 -0500; In a 110 MPH wind I will be up anyways! HI HI 73-- Dave Armbrust - AE4MR ARRL WCF Section Manager (941)378-1701 Fax: (941)929-0040 -- FAQ on WWW: http://www.contesting.com/FAQ/towertalk Submissions:; /archives//html/Towertalk/2001-01/msg00445.html (14,232 bytes)
8. [TowerTalk] Tower Concerns (score: 1): Author: ae4mr@arrl.org (Dave Armbrust); Date: Wed, 17 Jan 2001 14:04:17 -0500; What about all these self supporting cell towers going up all over the place. Are they rated for 110 MPH? They have some pretty good size antenna arrays at the top. Assuming 30sf at 200ft and 110 MP; /archives//html/Towertalk/2001-01/msg00446.html (9,456 bytes)
9. [TowerTalk] Tower Concerns (score: 1): Author: ae4mr@arrl.org (Dave Armbrust); Date: Wed, 17 Jan 2001 14:50:17 -0500; It has been suggested that I ignore the bracket as it could fail and design it as self supporting. So I ran the numbers. Here is the conclusion I can make regarding Self Supporting Rohn 45g tower in; /archives//html/Towertalk/2001-01/msg00447.html (9,787 bytes)
10. [TowerTalk] Tower concerns (score: 1): Author: ae4mr@arrl.org (Dave Armbrust); Date: Wed, 17 Jan 2001 15:09:53 -0500; It appears I can do the math myself in about 30 minutes. It is really not that tough. For what it is worth I think paying $350 to engineer to tell me my limit is 10' for a self supporting Rohn 45g t; /archives//html/Towertalk/2001-01/msg00448.html (11,295 bytes)
11. [TowerTalk] Sinking ground rods (score: 1): Author: ae4mr@arrl.org (Dave Armbrust); Date: Wed, 17 Jan 2001 15:41:04 -0500; The method I suggest is to take about 2-3' of that 1 1/2 water pipe, buy a cast iron end cap for it and slam it up and down on the ground rod until the top is within a couple of feet of the ground. U; /archives//html/Towertalk/2001-01/msg00450.html (11,708 bytes)
12. [TowerTalk] Ground rod drivers. (score: 1): Author: ae4mr@arrl.org (Dave Armbrust); Date: Fri, 19 Jan 2001 12:43:55 -0500; Well it all depends. If you are like me and have gone out and bought 1 1/2" ID water pipe thinking that I can be used as a mast! Seriously I have not priced these but $15 does seem like a bargain. An; /archives//html/Towertalk/2001-01/msg00497.html (11,038 bytes)
13. [TowerTalk] Reality Check (score: 1): Author: ae4mr@arrl.org (Dave Armbrust); Date: Fri, 19 Jan 2001 14:34:08 -0500; If they do have access to other types of tubing they it is likely to not be galvanized. You would then have to find some one to hot dip galvanize the tubing unless you go with aluminum which is even; /archives//html/Towertalk/2001-01/msg00499.html (8,243 bytes)

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