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AD5TH Tower - Storm Damage Photos
In all honesty to those that ridiculed the tower and it's associated
riggings etc...I have posted photos of the damage incurred from the category 4 hurricane Dennis. I never expected this kind of result...live and learn I suppose. Here is the direct link.. 1. http://deepsouthnet.net/storm_damage.html -- Charlie Ham Radio - AD5TH www.ad5th.com Deep South 2 Meter SSB Net www.deepsouthnet.net |
Charlie wrote:
In all honesty to those that ridiculed the tower and it's associated riggings etc...I have posted photos of the damage incurred from the category 4 hurricane Dennis. I never expected this kind of result...live and learn I suppose. Here is the direct link.. 1. http://deepsouthnet.net/storm_damage.html Your point would have been better if you had used actual before and after pictures. If you check the name on each picture you will find that they are the same exact file. Nice try... Dave N |
The images are the same yeah...DUH!!
Since there was no damage.....except perhaps your brain damage. You don't catch on too fast do you? -- Charlie Ham Radio - AD5TH www.ad5th.com Deep South 2 Meter SSB Net www.deepsouthnet.net "David G. Nagel" wrote in message ... Charlie wrote: In all honesty to those that ridiculed the tower and it's associated riggings etc...I have posted photos of the damage incurred from the category 4 hurricane Dennis. I never expected this kind of result...live and learn I suppose. Here is the direct link.. 1. http://deepsouthnet.net/storm_damage.html Your point would have been better if you had used actual before and after pictures. If you check the name on each picture you will find that they are the same exact file. Nice try... Dave N |
On Mon, 11 Jul 2005 13:08:49 -0500, "David G. Nagel"
wrote: Charlie wrote: In all honesty to those that ridiculed the tower and it's associated riggings etc...I have posted photos of the damage incurred from the category 4 hurricane Dennis. I never expected this kind of result...live and learn I suppose. Here is the direct link.. 1. http://deepsouthnet.net/storm_damage.html Your point would have been better if you had used actual before and after pictures. If you check the name on each picture you will find that they are the same exact file. Nice try... Dave N Not sure what Charlie's point is -- the Dennis hurricane historical map doesn't show it anywhere close to Union, Mississippi... bob k5qwg |
While the after picture may represent the condition of your tower after the
storm, it is NOT an after picture. Why the false representation? "Charlie" wrote in message ... In all honesty to those that ridiculed the tower and it's associated riggings etc...I have posted photos of the damage incurred from the category 4 hurricane Dennis. I never expected this kind of result...live and learn I suppose. Here is the direct link.. 1. http://deepsouthnet.net/storm_damage.html -- Charlie Ham Radio - AD5TH www.ad5th.com Deep South 2 Meter SSB Net www.deepsouthnet.net |
Because the images are virtually the same..even if I stepped outside and
shot a "true after" picture it would be the same image. Sorry to disappoint all you guys but there was no damage here.....as all but a very few "tower experts" predicted. -- Charlie Ham Radio - AD5TH www.ad5th.com Deep South 2 Meter SSB Net www.deepsouthnet.net "Fred W4JLE" wrote in message ... While the after picture may represent the condition of your tower after the storm, it is NOT an after picture. Why the false representation? "Charlie" wrote in message ... In all honesty to those that ridiculed the tower and it's associated riggings etc...I have posted photos of the damage incurred from the category 4 hurricane Dennis. I never expected this kind of result...live and learn I suppose. Here is the direct link.. 1. http://deepsouthnet.net/storm_damage.html -- Charlie Ham Radio - AD5TH www.ad5th.com Deep South 2 Meter SSB Net www.deepsouthnet.net |
That's crap John....provide a link that shows the track "nowhere near". We
were under a Inland Hurricane" warning from 5PM last night. Maybe your cartographer skills are a little rusty. -- Charlie Ham Radio - AD5TH www.ad5th.com Deep South 2 Meter SSB Net www.deepsouthnet.net "Bob Miller" wrote in message ... On Mon, 11 Jul 2005 13:08:49 -0500, "David G. Nagel" wrote: Charlie wrote: In all honesty to those that ridiculed the tower and it's associated riggings etc...I have posted photos of the damage incurred from the category 4 hurricane Dennis. I never expected this kind of result...live and learn I suppose. Here is the direct link.. 1. http://deepsouthnet.net/storm_damage.html Your point would have been better if you had used actual before and after pictures. If you check the name on each picture you will find that they are the same exact file. Nice try... Dave N Not sure what Charlie's point is -- the Dennis hurricane historical map doesn't show it anywhere close to Union, Mississippi... bob k5qwg |
On Mon, 11 Jul 2005 14:37:57 -0500, "Charlie"
wrote: That's crap John....provide a link that shows the track "nowhere near". We were under a Inland Hurricane" warning from 5PM last night. Maybe your cartographer skills are a little rusty. Looks like it was hitting Mississippi up around Columbus, and heading North from you... How high did your winds get ... in Union? http://www.wunderground.com/tropical.../at200504.html bob k5qwg |
Bob,
The storm was not a pinpoint single line width across the map but over 3 0 0 m i l e s wide. I did not measure the "winds in Union". If they were not high enough for you then maybe better luck next time. -- Charlie Ham Radio - AD5TH www.ad5th.com Deep South 2 Meter SSB Net www.deepsouthnet.net "Bob Miller" wrote in message ... On Mon, 11 Jul 2005 14:37:57 -0500, "Charlie" wrote: That's crap John....provide a link that shows the track "nowhere near". We were under a Inland Hurricane" warning from 5PM last night. Maybe your cartographer skills are a little rusty. Looks like it was hitting Mississippi up around Columbus, and heading North from you... How high did your winds get ... in Union? http://www.wunderground.com/tropical.../at200504.html bob k5qwg |
On Mon, 11 Jul 2005 14:52:11 -0500, "Charlie"
wrote: Bob, The storm was not a pinpoint single line width across the map but over 3 0 0 m i l e s wide. I did not measure the "winds in Union". If they were not high enough for you then maybe better luck next time. According to the storm category indications on the map at http://www.wunderground.com/tropical.../at200504.html "Hurricane Dennis" was actually a "tropical depression" before it ever crossed into Mississippi, some distance north of Union. Charlie, I would never wish high winds upon anyone, but before you brag about riding out a Category 4 Hurricane, you should be a little more accurate in your terminology :-) Have a good one... bob k5qwg |
"Charlie" wrote in message
... Because the images are virtually the same..even if I stepped outside and shot a "true after" picture it would be the same image. Sorry to disappoint all you guys but there was no damage here.....as all but a very few "tower experts" predicted. -- Charlie Ham Radio - AD5TH www.ad5th.com Deep South 2 Meter SSB Net www.deepsouthnet.net Charlie, you may have noticed that the thread died once people realised you are out of town and not endangering anyone else. Good on you for putting up a tower out there, what the hell, eh? But the distortions aren't exactly helpful. More to the point, how's the DX'ing? I used to have to go to a nearby mountainside road to get any height like you have now. Cheers. Ken |
President Bush has authorized "Disaster Relief Funds" for 38 counties in
Mississippi including my county of Newton. 1. http://www.wtok.com/home/headlines/1678647.html You cartographer skills as well as your meteorological powers of analysis leave a lot to be desired. Have a nice day.....sorry my tower did not collapse and that no one in my family was killed. Maybe next time..eh? -- Charlie Ham Radio - AD5TH www.ad5th.com Deep South 2 Meter SSB Net www.deepsouthnet.net "Bob Miller" wrote in message ... On Mon, 11 Jul 2005 14:52:11 -0500, "Charlie" wrote: Bob, The storm was not a pinpoint single line width across the map but over 3 0 0 m i l e s wide. I did not measure the "winds in Union". If they were not high enough for you then maybe better luck next time. According to the storm category indications on the map at http://www.wunderground.com/tropical.../at200504.html "Hurricane Dennis" was actually a "tropical depression" before it ever crossed into Mississippi, some distance north of Union. Charlie, I would never wish high winds upon anyone, but before you brag about riding out a Category 4 Hurricane, you should be a little more accurate in your terminology :-) Have a good one... bob k5qwg |
On Mon, 11 Jul 2005 15:31:05 -0500, "Charlie"
wrote: President Bush has authorized "Disaster Relief Funds" for 38 counties in Mississippi including my county of Newton. 1. http://www.wtok.com/home/headlines/1678647.html Yep, those tropical depressions can be rough -- let us know next time it rains in Union -- we'll want to see "before & after" pics of your tower. bob k5qwg You cartographer skills as well as your meteorological powers of analysis leave a lot to be desired. Have a nice day.....sorry my tower did not collapse and that no one in my family was killed. Maybe next time..eh? |
There are no distortions Ken. The tower looks the same the day before Dennis
as it does now the day after. The WHOLE POINT in using 2 identical photos was to illustrate that there IS NO DIFFERENCE after the storm. I have been on Usenet for 20 years or more and it is always the same....people just wait in the wings to take pot shots at others. I posted a link to the tower photos and all I got was ridicule and cuss words. Now that it survived the affects of hurricane Dennis I get accusations that Dennis never even came near my home. You guys can all go fish..or any other "F" word you might be able to think of. Sorry to rob you all of the splendor of viewing my new tower down on the ground. You ****ers are all a bunch of real sick *******s. -- Charlie Ham Radio - AD5TH www.ad5th.com Deep South 2 Meter SSB Net www.deepsouthnet.net "Ken Taylor" wrote in message ... "Charlie" wrote in message ... Because the images are virtually the same..even if I stepped outside and shot a "true after" picture it would be the same image. Sorry to disappoint all you guys but there was no damage here.....as all but a very few "tower experts" predicted. -- Charlie Ham Radio - AD5TH www.ad5th.com Deep South 2 Meter SSB Net www.deepsouthnet.net Charlie, you may have noticed that the thread died once people realised you are out of town and not endangering anyone else. Good on you for putting up a tower out there, what the hell, eh? But the distortions aren't exactly helpful. More to the point, how's the DX'ing? I used to have to go to a nearby mountainside road to get any height like you have now. Cheers. Ken |
In article ,
"Charlie" wrote: There are no distortions Ken. The tower looks the same the day before Dennis as it does now the day after. The WHOLE POINT in using 2 identical photos was to illustrate that there IS NO DIFFERENCE after the storm. I have been on Usenet for 20 years or more and it is always the same....people just wait in the wings to take pot shots at others. I posted a link to the tower photos and all I got was ridicule and cuss words. Now that it survived the affects of hurricane Dennis I get accusations that Dennis never even came near my home. You guys can all go fish..or any other "F" word you might be able to think of. Sorry to rob you all of the splendor of viewing my new tower down on the ground. You ****ers are all a bunch of real sick *******s. -- Charlie Ham Radio - AD5TH www.ad5th.com Deep South 2 Meter SSB Net www.deepsouthnet.net If you make yourself a target you become one dummy. "Ken Taylor" wrote in message ... "Charlie" wrote in message ... Because the images are virtually the same..even if I stepped outside and shot a "true after" picture it would be the same image. Sorry to disappoint all you guys but there was no damage here.....as all but a very few "tower experts" predicted. -- Charlie Ham Radio - AD5TH www.ad5th.com Deep South 2 Meter SSB Net www.deepsouthnet.net Charlie, you may have noticed that the thread died once people realised you are out of town and not endangering anyone else. Good on you for putting up a tower out there, what the hell, eh? But the distortions aren't exactly helpful. More to the point, how's the DX'ing? I used to have to go to a nearby mountainside road to get any height like you have now. Cheers. Ken |
Charlie wrote:
The WHOLE POINT in using 2 identical photos was to illustrate that there IS NO DIFFERENCE after the storm. I'll bet CSI could find a difference. -- 73, Cecil http://www.qsl.net/w5dxp ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |
Hey, Charlie, glad to hear your tower suffered no ill effects. You'll
be overjoyed to know that mine didn't either. Sorry, no pix available. Cheers, Tom |
On Mon, 11 Jul 2005 15:44:23 -0500, "Charlie"
wrote: There are no distortions Ken. The tower looks the same the day before Dennis as it does now the day after. The WHOLE POINT in using 2 identical photos was to illustrate that there IS NO DIFFERENCE after the storm. Charlie, the assessment that the "tower looks the same the day before Dennis as it does now the day after" is your own assessment, then to convince others, you misrepresent a "before" photograph as an "after" photograph as evidence to support your assessment. The photograph is not honest, it portrays what is in your mind rather than what is on the ground, and IMHO is only evidence of what is in your mind. Might have been a nice point if you did take an after photograph. As to the extent that you experienced Hurricane Dennis, I will leave that to you guys to work out. Owen -- |
Just posting a real 'after' shot would have shut people up (well, most, as
you say). Anyway, still glad it didn't come down. My only beef was ever the neighbours - since they aren't in sight (and I notice you don't seem to have your house near it either) I say go for it. Cheers. Ken "Charlie" wrote in message ... There are no distortions Ken. The tower looks the same the day before Dennis as it does now the day after. The WHOLE POINT in using 2 identical photos was to illustrate that there IS NO DIFFERENCE after the storm. I have been on Usenet for 20 years or more and it is always the same....people just wait in the wings to take pot shots at others. I posted a link to the tower photos and all I got was ridicule and cuss words. Now that it survived the affects of hurricane Dennis I get accusations that Dennis never even came near my home. You guys can all go fish..or any other "F" word you might be able to think of. Sorry to rob you all of the splendor of viewing my new tower down on the ground. You ****ers are all a bunch of real sick *******s. -- Charlie Ham Radio - AD5TH www.ad5th.com Deep South 2 Meter SSB Net www.deepsouthnet.net "Ken Taylor" wrote in message ... "Charlie" wrote in message ... Because the images are virtually the same..even if I stepped outside and shot a "true after" picture it would be the same image. Sorry to disappoint all you guys but there was no damage here.....as all but a very few "tower experts" predicted. -- Charlie Ham Radio - AD5TH www.ad5th.com Deep South 2 Meter SSB Net www.deepsouthnet.net Charlie, you may have noticed that the thread died once people realised you are out of town and not endangering anyone else. Good on you for putting up a tower out there, what the hell, eh? But the distortions aren't exactly helpful. More to the point, how's the DX'ing? I used to have to go to a nearby mountainside road to get any height like you have now. Cheers. Ken |
On Mon, 11 Jul 2005 12:49:26 -0500, "Charlie"
wrote: In all honesty to those that ridiculed the tower and it's associated riggings etc...I have posted photos of the damage incurred from the category 4 hurricane Dennis. I never expected this kind of result...live and learn I suppose. Here is the direct link.. 1. http://deepsouthnet.net/storm_damage.html Just because the antenna wasn't damaged in this storm doesn't mean it its installation is safe. So it withstood a storm whose biggest claim to fame around her is flood damage. Will the antenna stand the test of time? Good luck Plonk! -- 73 for now Buck N4PGW |
On Mon, 11 Jul 2005 19:47:37 -0400, Buck wrote:
On Mon, 11 Jul 2005 12:49:26 -0500, "Charlie" wrote: In all honesty to those that ridiculed the tower and it's associated riggings etc...I have posted photos of the damage incurred from the category 4 hurricane Dennis. I never expected this kind of result...live and learn I suppose. Here is the direct link.. 1. http://deepsouthnet.net/storm_damage.html Just because the antenna wasn't damaged in this storm doesn't mean it its installation is safe. So it withstood a storm whose biggest claim to fame around her is flood damage. Will the antenna stand the test of time? Good luck Plonk! While I'm not going to "plonk" you, I would advise you to get better guy anchors. Trees and utility poles aren't up to the task. If it was me, I'd set some 6 or 8 inch steel pipe about four to six feet into a BIG block of cement leaving six or seven feet out of the ground. Have lugs welded to the pipe and attach the guys to the lugs. This will get the guys up over head high and allow grass cutting and the like around the posts. When the tree comes down, so will your tower. Of course, using two different brands of tower section was just foolish, the money spent on making a possibly faulty adapter could have gone for another good section of tower. But, hey, it's your tower and your money. As for me and mine, good engineering practice takes precedence over make-do every time. Another amazing fact is that someone climbed up there to put it up and set antennas. It must have been a crazy man, as no sane tower-monkey would have climbed up there on two different tower sections and faulty guying. Be sure and post photos of the wreck when it comes down,eh. R |
Charlie wrote:
I have been on Usenet for 20 years or more and it is always the same....people just wait in the wings to take pot shots at others. I posted a link to the tower photos and all I got was ridicule and cuss words. You'd think your twenty years of Usenet experience would not have failed you like this. Sorry to rob you all of the splendor of viewing my new tower down on the ground. You ****ers are all a bunch of real sick *******s. No one wants your tower to fall down, nor harm to you or your family. But you basically posted troll fodder and then have the audacity to whine when it's not the attention you so wanted. If you don't like the heat, don't post stupid things on Usenet. |
Charlie wrote:
Because the images are virtually the same..even if I stepped outside and shot a "true after" picture it would be the same image. Sorry to disappoint all you guys but there was no damage here.....as all but a very few "tower experts" predicted. If they are two different pictures why do they have the same file name? Dave N |
Definately, sometimes we learn our lessons the hard way.
Susan Ham to be Husband Leon is KB7YXG |
Bob Miller wrote:
Yep, those tropical depressions can be rough -- let us know next time it rains in Union -- we'll want to see "before & after" pics of your tower. bob k5qwg Hardly even a tropical depression. here is the WEATHER.COM Wind history for Union (Actually Meridian) for the last few days. I would not call it a Cat 4 Hurricane, but like every thing Charlie says its an exaggeration http://www.wunderground.com/history/....html#calendar DATE High Avg Gusts Events 9 24 3 59 Rain , Thunderstorm 10 37 8 28 Rain 11 21 13 20 Rain 12 16 2 30 Thunderstorm |
Charlie wrote:
President Bush has authorized "Disaster Relief Funds" for 38 counties in Mississippi including my county of Newton. 1. http://www.wtok.com/home/headlines/1678647.html NOT FOR DISASTER RELIEF FUNDS but Federal assistance for Debris Removal and Emergency services ... NOT A DISASTER AREA. Nice Exaggeration! Additionally, Brown said the state and affected local governments in 23 counties are eligible to apply for federal funds to pay 100 percent of the approved costs for debris removal and emergency services related to the hurricane, including requested emergency work undertaken by the federal government, for a period of up to 72 hours. The 23 counties designated eligible for the assistance include Clarke, Covington, Forrest, George, Greene, Hancock, Harrison, Jackson, Jefferson Davis, Jones, Kemper, Lamar, Lauderdale, Lowndes, Marion, Neshoba, Newton, Noxubee, Pearl River, Perry, Smith, Stone, and Walthall. |
"Charlie" wrote in message ... The images are the same yeah...DUH!! Since there was no damage.....except perhaps your brain damage. You don't catch on too fast do you? -- Charlie Ham Radio - AD5TH www.ad5th.com Deep South 2 Meter SSB Net www.deepsouthnet.net Well, this will be my last post on this thread. I think Charlie has burnt his last shred of credibility by using identical images for "before" and "after" evidence. I'm sure everyone noted that not even a single tree leaf was lost during that disaster, so I suppose Charlie could also claim that his tower is as strong as a leaf, maybe even stronger! Since Charlie doesn't seem to worry too much about factual evidence, his request for technical comments must have been posted for entertainment value, and in that, he certainly has succeeded. Can we look forward to annual updates posting the same original image, thereby proving that Chuckie has not only built a strong, but an eternal tower? -- Ed WB6WSN El Cajon, CA USA |
"Charlie" wrote in message ... There are no distortions Ken. The tower looks the same the day before Dennis as it does now the day after. The WHOLE POINT in using 2 identical photos was to illustrate that there IS NO DIFFERENCE after the storm. I have been on Usenet for 20 years or more and it is always the same....people just wait in the wings to take pot shots at others. I posted a link to the tower photos and all I got was ridicule and cuss words. Now that it survived the affects of hurricane Dennis I get accusations that Dennis never even came near my home. You guys can all go fish..or any other "F" word you might be able to think of. Sorry to rob you all of the splendor of viewing my new tower down on the ground. You ****ers are all a bunch of real sick *******s. -- Charlie Ham Radio - AD5TH www.ad5th.com Deep South 2 Meter SSB Net www.deepsouthnet.net Yeah, this is definitely my last post on the thread. Charlie, you are a damn liar. If you go back to the record, you will find that I responded with cogent comment regarding legalities of encroachment, concerns about mechanical stress and inadequacies of base planning. For whatever personal reasons you have, you are incapable of accepting the realistic analyses that you requested. Here Chuckie, print this and post it on your wall: You've got one tremendous tower, good buddy, and I'm proud to say that I live 2000 miles away from it, and you! -- Ed WB6WSN El Cajon, CA USA |
"spaceyfi" wrote in message oups.com... Definately, sometimes we learn our lessons the hard way. Susan Ham to be Husband Leon is KB7YXG Some people, a select few, can repeat the course indefinitely, yet still rant at the gods over their misfortunes. -- Ed WB6WSN El Cajon, CA USA |
In article gf6Be.31364$ro.4327@fed1read02,
"Ed Price" wrote: "Charlie" wrote in message ... The images are the same yeah...DUH!! Since there was no damage.....except perhaps your brain damage. You don't catch on too fast do you? -- Charlie Ham Radio - AD5TH www.ad5th.com Deep South 2 Meter SSB Net www.deepsouthnet.net Well, this will be my last post on this thread. I think Charlie has burnt his last shred of credibility by using identical images for "before" and "after" evidence. I'm sure everyone noted that not even a single tree leaf was lost during that disaster, so I suppose Charlie could also claim that his tower is as strong as a leaf, maybe even stronger! Since Charlie doesn't seem to worry too much about factual evidence, his request for technical comments must have been posted for entertainment value, and in that, he certainly has succeeded. Can we look forward to annual updates posting the same original image, thereby proving that Chuckie has not only built a strong, but an eternal tower? Me thinks charlie is a kook. |
Hang tough & enjoy your tower Charlie!
If it breaks, fix it. Otherwise enjoy it! Some day I may get brave and post the pictures of my fold over-crank up mast with the CushCraft A3 beam on it. It waves around in the wind like a sailboat mast and flexes the I-beam gantry enough to scare the clueless when it is time to do antenna work. When mine breaks, I will either fix or replace, just as I have always done... My current worries are lightning and ice. It has only been up about five years, time will tell. On Wed, 13 Jul 2005 03:43:15 -0700, "Ed Price" wrote: "Charlie" wrote in message ... The images are the same yeah...DUH!! Since there was no damage.....except perhaps your brain damage. You don't catch on too fast do you? -- Charlie Ham Radio - AD5TH www.ad5th.com Deep South 2 Meter SSB Net www.deepsouthnet.net Well, this will be my last post on this thread. I think Charlie has burnt his last shred of credibility by using identical images for "before" and "after" evidence. I'm sure everyone noted that not even a single tree leaf was lost during that disaster, so I suppose Charlie could also claim that his tower is as strong as a leaf, maybe even stronger! Since Charlie doesn't seem to worry too much about factual evidence, his request for technical comments must have been posted for entertainment value, and in that, he certainly has succeeded. Can we look forward to annual updates posting the same original image, thereby proving that Chuckie has not only built a strong, but an eternal tower? |
"John Ferrell" bravely wrote to "All" (13 Jul 05 14:47:06)
--- on the heady topic of " AD5TH Tower - Storm Damage Photos" JF From: John Ferrell JF Xref: aeinews alt.ham-radio.vhf-uhf:8238 JF Hang tough & enjoy your tower Charlie! JF If it breaks, fix it. Otherwise enjoy it! JF Some day I may get brave and post the pictures of my fold over-crank JF up mast with the CushCraft A3 beam on it. It waves around in the wind JF like a sailboat mast and flexes the I-beam gantry enough to scare the JF clueless when it is time to do antenna work. JF When mine breaks, I will either fix or replace, just as I have always JF done... JF My current worries are lightning and ice. JF It has only been up about five years, time will tell. There is a thing called metal fatigue of which I was abruptly reminded of this spring. I was raking the lawn as I usually do and the aluminum handle just snapped in half without any provocation. No way I could have casually seen it but the rake was some decades old and probably flexed all it would flex. So there you go, time is against us! A*s*i*m*o*v .... Give me that old time religion. Hail, Zeus! |
Asimov wrote:
"There is a thing called metal fatigue of which I was strongly reminded this spring." Yes. It usually begins with a microscopic crack. The greater the stress, the shorter the life. Damage is cumulative. It is affected by temperature and surface finish. Some metals such as steel and titanium have lower stress limits below which they are mostlly im,mune to failure from repeated flexing. Other metals such as aluminum and its alloys have no such immunity and eventually fail under repeated flexing. In these, designs are kept below the fatigue threshold for the number of stress cycles expected within their lives. Or, a lifetime is specified and replacement is required. Another technique is non-destructive testing to find cracks and the piece is retired for cause. Best regards, Richard Harrison, KB5WZI |
I rarely get caught with the antenna fully extended when the wind is
gusting.Thank goodness for electric winches! Crank up masts are an entirely different kind of antenna mount. I would not bet on it withstanding 110 mph winds in the up position, but I am betting it will do more than that retracted! Wednesday, 13 Jul 2005 23:14:08 -500, "Asimov" wrote: "John Ferrell" bravely wrote to "All" (13 Jul 05 14:47:06) --- on the heady topic of " AD5TH Tower - Storm Damage Photos" JF From: John Ferrell JF Xref: aeinews alt.ham-radio.vhf-uhf:8238 JF Hang tough & enjoy your tower Charlie! JF If it breaks, fix it. Otherwise enjoy it! JF Some day I may get brave and post the pictures of my fold over-crank JF up mast with the CushCraft A3 beam on it. It waves around in the wind JF like a sailboat mast and flexes the I-beam gantry enough to scare the JF clueless when it is time to do antenna work. JF When mine breaks, I will either fix or replace, just as I have always JF done... JF My current worries are lightning and ice. JF It has only been up about five years, time will tell. There is a thing called metal fatigue of which I was abruptly reminded of this spring. I was raking the lawn as I usually do and the aluminum handle just snapped in half without any provocation. No way I could have casually seen it but the rake was some decades old and probably flexed all it would flex. So there you go, time is against us! A*s*i*m*o*v ... Give me that old time religion. Hail, Zeus! |
In all honesty to those that ridiculed the tower and it's associated riggings etc...I have posted photos of the damage incurred from the category 4 hurricane Dennis. According to my map you weren't hit by hurricane Dennis..... maybe a bit of tropical storm.... maybe. Ed |
http://www.wunderground.com/history/...2/MonthlyHisto ry.html#calendar DATE High Avg Gusts Events 9 24 3 59 Rain , Thunderstorm 10 37 8 28 Rain 11 21 13 20 Rain 12 16 2 30 Thunderstorm Damn! gusts to 59 and they get Federal disaster assistance? Hell, we had gusts that high in the past couple months on the Oregon coast. Maybe we ought to appy too? Ed K7AAT |
Asimov wrote:
"Richard Harrison" bravely wrote to "All" (14 Jul 05 12:04:53) --- on the heady topic of " AD5TH Tower - Storm Damage Photos" RH From: (Richard Harrison) RH Xref: aeinews rec.radio.amateur.antenna:34153 RH Some metals such as steel and titanium have lower stress limits below RH which they are mostlly im,mune to failure from repeated flexing. Other RH metals such as aluminum and its alloys have no such immunity and RH eventually fail under repeated flexing. In these, designs are kept RH below the fatigue threshold for the number of stress cycles expected RH within their lives. Or, a lifetime is specified and replacement is RH required. Another technique is non-destructive testing to find cracks RH and the piece is retired for cause. How can one estimate stress cycles from a wind load? A*s*i*m*o*v Believe it or not, but from historical weather data. Historical wind profiles do exist. Statistical analysis will yield an 80 percentile, 90 percentile or even 99 percentile probability of all wind being below the profile limit. |
Asimov wrote:
"How can one estimate stress cycles from a wind load?" Tower failure usually results from a single event or cycle of overstress. Radio towers are rated according to the mph or wind load ( pounds per square foot) they will withstand while carrying all their other loads, dead or live. Towers do vibrate in a breeze as any tower climber can affirm. Resonant frequency depends on construction. Wind vibration has brought down structures. A famous example is "Galloping Gertie", a suspension bridge in the western U.S.A. Deflection is limited in radio towers and elastic limits are not exceeded. The tower section returns to its original form after each flexing. Stress cycles enlarge certain microscopic cracks. Examples are the Comet airliner. Three aircraft flew apart in mid-air. It was determined that stress cracks in the angular corners of its windows were enlarged by pressurization / depressurization cycles. This was fixed by rounded corners but it was too late. The first jet airliner was scrubbed. Another example is found in high pressurre gas pipelines. Their internal pressure cycles and this tends to enlarge microscopic cracks, if any, in the pipe. Pipes are hydrostatically tested before placed in service (no energy storage in water as it is incompressible) so a pipe blow out of water won`t likely hurt a bystander. After the pipe is put in service it is retested each year. Radio towers are not usually flexed beyond limits by vibration but come down due to an accident and / or extreme wind. Best regards, Richard Harrison, KB5WZI |
Yes, the Tacoma Narrows Bridge !
They forgot to design it for torsional forces. Expensive lesson to learn. It was rebuilt without the solid sides, this allows the winds to pass between the steel members instead of against them. jake Richard wrote: Asimov wrote: "How can one estimate stress cycles from a wind load?" Tower failure usually results from a single event or cycle of overstress. Radio towers are rated according to the mph or wind load ( pounds per square foot) they will withstand while carrying all their other loads, dead or live. Towers do vibrate in a breeze as any tower climber can affirm. Resonant frequency depends on construction. Wind vibration has brought down structures. A famous example is "Galloping Gertie", a suspension bridge in the western U.S.A. Deflection is limited in radio towers and elastic limits are not exceeded. The tower section returns to its original form after each flexing. Stress cycles enlarge certain microscopic cracks. Examples are the Comet airliner. Three aircraft flew apart in mid-air. It was determined that stress cracks in the angular corners of its windows were enlarged by pressurization / depressurization cycles. This was fixed by rounded corners but it was too late. The first jet airliner was scrubbed. Another example is found in high pressurre gas pipelines. Their internal pressure cycles and this tends to enlarge microscopic cracks, if any, in the pipe. Pipes are hydrostatically tested before placed in service (no energy storage in water as it is incompressible) so a pipe blow out of water won`t likely hurt a bystander. After the pipe is put in service it is retested each year. Radio towers are not usually flexed beyond limits by vibration but come down due to an accident and / or extreme wind. Best regards, Richard Harrison, KB5WZI |
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