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Preparing your house for the storm

 

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The website www.disastersafety.org provides a list of resources that deal with reinforcing structures, as well as how to maintain a roof and choose the right hurricane shutter. It also outlines the Insurance Institute for Business & Home Safety’s Fortified program, which lists specific steps for improving the quality of structures.


jennyhiaasen@bellsouth.net

As a structural engineer whose expertise is fortifying buildings against severe wind events, Timothy Reinhold has traveled the country examining the wreckage incurred by powerful hurricanes, from the wide swaths carved in 1992 by Andrew to the strips of aluminum siding left dangling in trees like Christmas tinsel after Charley in 2004.

In lectures, the former Clemson University professor likes to include a picture taken in Miami-Dade County after Andrew. Taken from above by a Miami Herald photographer, it shows a woman staring up from her roofless house, its four walls completely intact and the furniture still neatly arranged around her. The shot, he explains, perfectly demonstrates what can happen when a house is properly anchored. Her walls, made of concrete and secured with tie beams as required by code, held. Even though she lost her roof, it could have been much worse.

It also suggests how we should prepare for storms: in the short term and for the long haul.

At the start of every hurricane season, the Federal Emergency Management Agency (www.ready.gov) advises taking some basic steps.

• Have shutters or 5/8-inch marine plywood to cover windows and doors.

• Trim trees and shrubs, clear rain gutters and, if you have a flat roof, make sure rainwater doesn’t pond and drain openings are clear.

•  Also consider securing roofs with additional straps or clips. If you can keep the wind out of your house, Reinhold explained, the risk of severe damage shrinks dramatically. “We’ve had cases where the house took up to 130 mph winds. But then you break a window on the front face, and suddenly the whole house is coming apart at 105 mph,” he said. “So that’s pretty dramatic.”

• Once a warning is issued, the National Hurricane Center (www.nws.noaa.gov) says it’s time to cover windows and doors and move light objects like garbage cans, plants and outdoor furniture indoors. (And never mind taping windows. It’s pointless.)

• If you’re riding out the storm in your homes, set the refrigerator on high and keep the door closed, turn off propane tanks, unplug small appliances and fill the bathtub with water.

• Then, if winds become strong, close interior doors, stay away from windows and, in a multistory building, go to the first or second floor, FEMA advises. In a flood zone, keep an ax in the attic.

While we often think of hurricane preparation as these hurried, last-minute steps, we should also begin to prepare long in advance, experts say.

Structural integrity, the kind usually hidden from view but what insures a house is properly secured, can make all the difference, Reinhold said.

Take Andrew, the Category 5 storm that destroyed 25,000 homes and severely damaged another 100,000 across South Florida. Coral Gables suffered a third of the damage inflicted on surrounding communities, Reinhold said. That wasn’t just due to the storm’s path, but because Herb Saffir worked and lived in the city. Saffir, the famed structural engineer who calculated the Saffir-Simpson scale used to measure storms, insisted on the city’s strict enforcement of its building code, he said.

How a house is reinforced can depend on its age and construction. Houses built in the 20s tend to be poured concrete and many builders used straps to secure roofs. By the 1970s and 80s, houses were built less soundly. Engineers generally agree the best place to begin is the roof. “There’s been a flipping of what’s the biggest weakness. Is it the roof or the openings?” Reinhold said. “We usually start with the roof because what we see time and time again is 95 percent of the time the roof is involved in the (insurance) claim.”

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