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## Re: [TowerTalk] HDBX-48 figures for 90 mph zone

 To: w2lu@rochester.rr.com, xnewyorka@hotmail.com, towertalk@contesting.com, mikew3mc@gmail.com Re: [TowerTalk] HDBX-48 figures for 90 mph zone TexasRF@aol.com Tue, 6 Dec 2011 17:23:35 -0500 (EST) mailto:towertalk@contesting.com>
 Hi Gene and Mike, my recollection is there were no 90 mph calculations for the BX series towers. The conversion from 70 to 90 mph is not simple or straightforward. The problem is that the tower itself represents a large windload and when that is taken into account, there is nothing left for an antenna load. Sorry to be the bearer of bad news! 73, Gerald K5GW In a message dated 12/6/2011 3:43:51 P.M. Central Standard Time, w2lu@rochester.rr.com writes: As I recall wind pressure "on a flat surface" at 70 mph is 20.6 lbs/sq ft., so if the tower is rated for 18 sq ft at 70 mph, would it be too much of a stretch to say to the zoning board that since wind pressure at 90 mph is 34 lbs/sq ft, by simple math, the tower should be good for 10.9 sq ft at 90 mph ? Gene / W2LU _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/listinfo/towertalk _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/listinfo/towertalk
 Current Thread Re: [TowerTalk] HDBX-48 figures for 90 mph zone, TexasRF <= Re: [TowerTalk] HDBX-48 figures for 90 mph zone, Jim Lux Re: [TowerTalk] HDBX-48 figures for 90 mph zone, David Thompson Re: [TowerTalk] HDBX-48 figures for 90 mph zone, Tim Wininger Re: [TowerTalk] HDBX-48 figures for 90 mph zone, David Jordan [TowerTalk] HDBX-48 figures for 90 mph zone, Jim Thomson Re: [TowerTalk] HDBX-48 figures for 90 mph zone, Jim Lux Re: [TowerTalk] HDBX-48 figures for 90 mph zone, Gene Fuller Re: [TowerTalk] HDBX-48 figures for 90 mph zone, Mike Cizek Re: [TowerTalk] HDBX-48 figures for 90 mph zone, Richard Solomon Re: [TowerTalk] HDBX-48 figures for 90 mph zone, Jim Lux