>> TITAN MAXIMUM WIND THRUST VALUES
>>
>>MODEL MAX HEIGHT 70MPH 85MPH
>>----- ---------- --------------- ---------------
>>T200 96ft 200lbs/15 sq ft n/a
>>T300 88ft 300lbs/22 sq ft 110lbs/ 6 sq ft
>>T400 80ft 460lbs/34 sq ft 240lbs/12 sq ft
>>T500 72ft 600lbs/45 sq ft 450lbs/22 sq ft
>>T600 64ft 800lbs/60 sq ft 700lbs/35 sq ft
>>T700 56ft 1000lbs/80 sq ft 900lbs/45 sq ft
>>T800 48ft 1300lbs/99 sq ft 1130lbs/58 sq ft
>>
>
>Hi Scott,
>
>I noticed that when you divide the "lbs" by the "sq ft" you get about 13 at
>70 mph and about 20 at 85 mph using the data in the above chart. An old EIA
>wind chart that I have in an old Rohn catalog says 70 mph is 19.6 lb/sq ft
>and 85 mph is 28.9 lb/sq ft. The implication is that maybe the "sq ft"
>rating is a little too high for the "lbs" number. But maybe my data is just
>too old and the EIA chart has not been found to be accurate.
>
>What do you think K7LXC?
>
>Stan w7ni@teleport.com
I would think that the chart from each manufacturer would be different due
to design specs.
There is some correlation between weight (down moment) and square feet, but
normally a tower mfg designs to a certain dead weight limit then looks at
side moments or max sq ft. The Rohn BX series can handle 10 sq feet but a
max of a 10 foot boom.
Weight is strictly a discrete measurement. Sq ft is calulated from wind
resistance on the elements and boom. This will vary from one manufacturer
to another unless they use the exact same design.
Rohn told me that the EIA spec is a respected guideline. Trylon is just
more conservative.
Dave K4JRB
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