http://www.adobemachine.com/tornadoproof.htm
http://en.wikipedia.org/wiki/Central_Texas_tornado_outbreak
The tornado initially caused major damage to a marina on Lake Travis. The tornado then severely damaged a reinforced concrete building containing a telephone switching center. It then completely destroyed a stone house, leaving the foundation bare. It then moved into the Hazy Hills subdivision, destroying several homes and mobile homes. This tornado killed one man while he was either blown from his mobile home or truck while attempting to seek safe shelter.[2]
Grass and dirt in fields near Jarrell were ripped up out of the ground to a depth of 18 in or (50 cm). When the tornado crossed county roads outside Jarrell, it ripped 500 feet (150m) of asphalt off the roads.[2]http://www.nws.noaa.gov/om/assessments/pdfs/jarrell.pdf
Nije pitanje samo cement, vec i jacina tornada, nezaboravi objekte koje ce da udare u zgradu, nesmes da imas otvorene prozore, oblik zgrade,....
Snaga Tornado sa
http://www.wunderground.com/tornadoFAQ.asp
New EF Scale: Old F-Scale: Typical Damage:
EF0 (65-85 mph) F0 (65-73 mph) Light damage. Peels surface off some roofs; some damage to gutters or siding; branches broken off trees; shallow-rooted trees pushed over.
EF1 (86-110 mph) F1 (73-112 mph) Moderate damage. Roofs severely stripped; mobile homes overturned or badly damaged; loss of exterior doors; windows and other glass broken.
EF2(111-135 mph) F2 (113-157 mph) Considerable damage. Roofs torn off well-constructed houses; foundations of frame homes shifted; mobile homes completely destroyed; large trees snapped or uprooted; light-object missiles generated; cars lifted off ground.
EF3 (136-165 mph) F3 (158-206 mph) Severe damage. Entire stories of well-constructed houses destroyed; severe damage to large buildings such as shopping malls; trains overturned; trees debarked; heavy cars lifted off the ground and thrown; structures with weak foundations blown away some distance.
EF4 (166-200 mph) F4 (207-260 mph) Devastating damage. Whole frame houses Well-constructed houses and whole frame houses completely leveled; cars thrown and small missiles generated.
EF5 (>200 mph) F5 (261-318 mph) Incredible damage. Strong frame houses leveled off foundations and swept away; automobile-sized missiles fly through the air in excess of 100 m (109 yd); high-rise buildings have significant structural deformation; incredible phenomena will occur.
EF No rating F6-F12 (319 mph to speed of sound) Inconceivable damage. Should a tornado with the maximum wind speed in excess of F5 occur, the extent and types of damage may not be conceived. A number of missiles such as iceboxes, water heaters, storage tanks, automoblies, etc.will create serious secondary damage on structures.
-------
65 miles = 104.60736 kilometers
200 miles = 321.8688 kilometers
Jarell je bio udaren sa F5 tornadom, verovatno si video film Twister (1996) tamo su jurili F5
F0 oluci osteceni F1 rusi crepove, F2 odnosi krov, F3 prevrce kola, F4 baca kola i lete manji projektili, F5 pravi strukturnu ostetu na soliteru, auta lete, F6+ sta ne moze?
------
edit: dodao sam izmedju ----
[Ovu poruku je menjao tahuti dana 31.07.2008. u 06:49 GMT+1]
[Ovu poruku je menjao tahuti dana 31.07.2008. u 06:52 GMT+1]
Tornado i 'evropske' zgrade
