Most such buildings hit by tornados cannot withstand the enormous pressure.
How to keep a roof safe during a tornado.
Head to a pre designated safe area like a safe room storm cellar or a windowless interior room.
Minimize your contact with the ground by keeping your feet and knees together head tucked and hands over your ears.
Get in if you are outside get inside.
A long span building such as a shopping mall theater or gymnasium is especially dangerous because the roof structure is usually supported solely by the outside walls.
Get under a sturdy table cover your head and neck with your arms and or with a heavy coat blankets or pillows.
If you are in a long span building during a tornado stay away from windows.
If you are in a high rise building head to a small interior room on the lowest floor possible.
Go to the basement or an inside room without windows on the lowest floor bathroom closet center hallway.
Masonry chimneys that extend more than six feet above the roof or have a width of 40 inches or more should have continuous vertical reinforcing steel placed in the corners to provide greater resistance to wind loads.
Try to put as many walls as you can between you and the outside.
Cover your head and neck with your arms or a jacket if.
If you re in a.
If you are stuck outdoors when a thunderstorm hits crouch down.
To reinforce roofs against tornadoes you ll need a structural reinforced concrete roof deck.
Get down get underground if possible.
Falling and flying debris cause most deaths and injuries during a tornado.
If you cannot find a place to go inside crouch for protection next to a strong structure or lie flat in a ditch or other low lying area.