What is "metal strapping" ?\n\nI think they just use nails for the walls here.\n\nWe have tornado shelters. But I think everyone assumes that if a tornado hits the house directly and pulls off all the bricks, rocks, and roofs, "metal straps" probably won't stop the tornado either.\n\nThe objective is to hold your roof on (which is the easiest thing for a tornado to lift away - no matter what your walls are made of.\n\nhttp:\/\/newsok.com\/article\/3597356\n\n\nBourdeau, a hazard performance analyst for FEMA, was sent to Oklahoma after tornadoes tore through May 24, destroying some 600 homes and pummeling the Piedmont area especially hard. He'll be here through October, he said, both studying what led to such high levels of destruction as well as what can be done to make homes safer.\n\nBourdeau, who works out of a regional FEMA office in Texas, is from South Carolina, where building codes along the hurricane-prone coastal areas require structures to withstand 120-mph, three-second gusts.\n\n“Pretty tough design,” he said, “and that, of course, has all been tested.”\n\nMcCarty's project is designed to those standards, even though Oklahoma code requirements are lower, mandating structures to stand up to 90-mph winds.\n\nBourdeau said he'd prefer using the more rigorous standards in all parts of the country.\n\n“It just makes for a stronger structure,” he said.\n\nBut the goal is to educate, not mandate.\n\n\nTalk to your insurance agent. They should know a bit about it.\n\nCoastal SC has started putting threaded rods all of the way from slab to roof. I don't think it is required, but all of the homes I saw being built 3 years ago had them. Not sure if hurricane vs tornado would change the best (economically effective) option.