Missouri Storm Shelters, Inc. carries the largest selection of certified storm shelters in the world. A "certified” storm shelter simply means that the unit has been properly tested and engineered to withstand an EF-5 tornado and meets all codes and guidelines set forth by the National Storm Shelter Association, the International Code Council, and FEMA”S engineering standards. FEMA recognizes the Wind Energy Science Department at Texas Tech University in Lubbock, Texas as the official testing center for wind driven air borne objects hurled by tornadic winds and the damage they cause. The Debris Impact Test Center at Texas Tech shoots laser guided projectiles from an air cannon at a speed estimated 50 mph greater than an EF-5 tornado at vulnerable impact points on shelters and doors. The purpose is to determine if these impacts will cause the structure to fail or not.
Once this test has been successful, the engineered drawings are submitted to designated wind engineer specialists. We use the firm of McDonald-Mehta, whom are regarded as the most experienced and recognized wind engineers in the world. They are the same wind engineers the National Weather Service hired to re-vamp the Fugita scale for rating tornado intensity. ( formerly referred to as F-1, F-2, etc.). Jim McDonald and his partner, Kishor Mehta, won national recognition for their years spent creating the ENHANCED Fugita scale (now referred to as EF-1, EF-2, etc). McDonald-Mehta gives us and the National Storm Shelter Association the results of their evaluation, and again, they must show that the shelter evaluated will withstand an EF-5 tornado. The shelters must also pass the code requirements of ICC-500.
After all requirements have been proven, the National Storm Shelter Association issues Missouri Storm Shelters, Inc., numbered seals which we provide with each shelter along with a certificate of installation. The shelter and serial # is registered with the NSSA. All NSSA members must maintain certain standards and requirements set forth by NSSA, including selling only storm shelters that are certified as well as complying with any updated requirements issued by the NSSA.
Nearly all corporations contacting us and all governmental agencies now require the seal provided by NSSA with their storm shelters purchases. It is really the only quality verification standard in existence.