Dear Group: I just joined Tower Talk -- I've read through the last 5 years of archives and have certainly learned a lot I did not know. What a resource! I have a question: I have just ordered a US To
Norm-- Be cautious about your assumptions. The direction of the strongest winds does not correlate closely with the direction of the storm path. I one did a study for a Rocket test site, (over 30 yea
Norm, Bill is right but hasn't dropped the other shoe yet. Will some mechanical engineer type please tell us which direction of lean is strongest in a triangular tower with X-braces or the typical zi
I don't think wind direction matters. However, a leg is in the most tension when the wind is dead onto an apex. A leg is in the most compression when the wind is dead onto a face. Beyond that, loads
TT: If the wind were to blow normal to one face of a tower, the opposite single leg would be the weakest. Assuming the cross-bracing holds (does not fail) upon exposure to high winds, the windward le
I would say if you have to guess which way a strong wind will blow and try to figure out whether a tower will be stronger in one orientation versus another in order to sleep better the plan is margin
I do a lot of VHF/UHF and ran stuff like 7/8" and 1 5/8" heliax down the tower legs. Then I noticed the cell phone companies run their heliax down the face of the tower. Around SW MS it seems to be r
Dear Group: Thank you for your comments -- all, very good points. Yes, I may be over thinking this. I purposely bought the heavy duty tower to make sure I had more than the required antenna area capa
Of course this assumes the failure mode is due to a compression failure. As others have said, there is a significant torsion mode of failure, and at least in theory the leg COULD fail in tension, so
I should add that I was considering a free-standing tower (which is what I have). In the case of a guyed tower, the harder the wind blows, the more the downward force on the tower legs, all of them.
I would hope that he does not indent to guy his crank-up tower. I would just orient the base so the tower tilts in the most convenient direction and not worry about the strength differences that may
Norm There should be no difference. If you want to discuss the tower design, call Remigio Fernandez at US Tower. He's the engineer whose name is on the PE wet-stamp structural drawings. Orient the ba
N6SJ Steve has offered the best advice below. In my experience Remigio is quick to reply to questions via e-mail. rfernandez@ustower.com Remigio Fernandez-Garcia Civil Engineer US Tower Corp. 1099 We
The HDX-555 is a crank-up with no guys. Thanks for all your suggestions. 73's Norm Cox KE0ZT N6SJ Steve has offered the best advice below. In my experience Remigio is quick to reply to questions via
Author: K7LXC--- via TowerTalk <towertalk@contesting.com>
Date: Mon, 6 Oct 2014 17:05:00 -0400
I just joined Tower Talk -- I've read through the last 5 years of archives Yikes. My condolences - hi. LOTS of info there. And welcome to TowerTalk. Cheers, Steve K7LXC _____________________________
Thank you, Steve....I've learned a lot from the archives, hope to continue to learn. I did take the suggestion to contact the structural engineer at US Towers. Regarding the orientation of the T-base
If the wind were to blow normal to one face of a tower, the opposite single leg would be the weakest. Assuming the cross-bracing holds (does not fail) upon exposure to high winds, the windward legs o
Now consider the case when the wind is from the single leg side of the tower and towards the opposite face. The single windward leg will be in tension and the two opposite legs will be in compression
Author: K7LXC--- via TowerTalk <towertalk@contesting.com>
Date: Tue, 7 Oct 2014 12:19:49 -0400
Towers. Regarding the orientation of the T-base.....he said that the strength of the tower will be about the same in all directions, and suggested I just orient the base so that laying the tower dow