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©2001-2005
The Anchor Post Company

1150 Hungryneck Blvd
Suite C-346
MT Pleasant, SC 29464
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  Saffir-Simpson Hurricane Scale
1 Winds 74-95 mph (64-82 kt. or 119-153 kph). Storm surge generally 4-5 feet above normal, no real damage to building structures. Damage primarily to unanchored mobile homes, shrubbery, and trees.
2 Winds 96-110 mph (83-95 kt or 154-177 kph). Storm surge generally 6-8 feet above normal, some roofing material, door, and window damage of buildings. Considerable damage to shrubbery and trees with some trees blown down. Considerable damage to mobile homes, poorly constructed signs, and piers.
3 Winds 111-130 mph (96-113 kt. or 178-209 kph). Storm surge generally 9-12 feet above normal, some structural damage to small residences and utility buildings with a minor amount of curtain wall failures.
Damage to shrubbery and trees with foliage blown off trees and large trees blown down. Mobile homes and poorly constructed signs are destroyed.
4 Winds 131-155 mph (114-135 kt. or 210-249 kph). Storm surge generally 13-18 feet above normal, more extensive curtainwall failures with some complete roof structure failures on small residences. Shrubs, trees, and all signs are blown down. Complete destruction of mobile homes.
5 Winds greater than 155 mph (135 kt. or 249 kph), storm surge generally greater than 18 feet above normal. Complete roof failure on many residences and industrial buildings. Some complete building failures with small utility buildings blown over or away. All shrubs, trees, and signs blown down. Complete destruction of mobile homes.

The U.S. experiences an average of 100,000 thunderstorms each year - about 1,000 develop into tornadoes.
U.S. tornadoes kill about 42 people each year and cost hundreds of millions of dollars in damage.
All residential housing are vulnerable, in particular mobile and modular homes.

According to a recent government study of 300 tornadoes in 1998, 90% were Category 3 or less, and 70% of the damage reported was from structures being shifted or removed from their foundations.
-- Source: Project Impact

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