Underground Storm Shelters Glenpool
On May 3, 1999 an EF5 tornado struck Moore, OK that had record wind speeds of over 300mph. After that 1999 tornado, we realized that not everyone in Oklahoma had the room to put in a septic tank protector. People had very, very limited choices related to protecting their families from tornadoes. At that time, underground storm shelters in Glenpool were not installed in half the houses they are now.
Immediately thereafter, the first generation of the in-garage, underground storm shelters was born. This allowed for the masses to put in a shelter underground, in their house for tornado protection. Homes throughout Glenpool were installing these underground storm shelters to protect themselves.
This was a good idea for sheltering people and keeping them from the weather but it had its downfalls. It stuck up 4 to 5 inches off the garage floor, had poor ventilation, rusted out quickly, and had steep, awkward ladders for entry and exit. Many of these underground storm shelters in Glenpool weren’t installed properly and have really floated up from the ground due to buoyancy and ground water. We took note, and made history.
In 2003, the FlatSafe Tornado Shelter was invented. We engineered our underground storm shelters, to be installed in-garage to deal with the destructive forces involved with tornadoes that would give our Glenpool customers peace of mind and supply them with the highest probability of survival in an EF5 tornado.
Through extensive research, we identified vacuum, air pressure, and debris as the most damaging forces connected with tornadoes.
With potential wind speeds of 300+miles in mind, we realized that vacuum is among the most damaging forces that tornadoes create. It does not take much vacuum pressure, with respect to psi, to cause structural damage. To counter vacuum forces, FlatSafe made a lid system that permits 360o of ventilation for quick equalization of pressure inside the shelter. By boosting the pressure inside of the shelter to quickly equalize with the outside pressure, the secured lid process is held securely closed.
We recognized that 300+mph winds can cause enormous damage to whatever it slams against so we sought to reduce our exposed surface area as much as possible. The patented FlatSafe lid system only sticks up 1/4″, so there is very little surface area affected by horizontal wind speeds.
Because FlatSafe Tornado Shelters are below ground, it’s from the way of horizontal winds and the debris thrown and circulated by it. So the only debris to be concerned about is falling debris. We knew that all debris falls at exactly the same speed and just mass determines its impact. Our 1/4″ plate lid is larger than the shield opening and is reinforced to absorb and withstand some falling debris that might land squarely on it. We designed it to provide more than adequate ventilation (breathing) even after impact.
FlatSafe Underground Storm Shelters
The FlatSafe Tornado Shelter was engineered to meet all of the regulations and criteria which were available. It was also engineered with rust protection options to ensure that the shelter would last as long as the house and the homeowner. FlatSafe provided the original single-lid design and was the first low-profile, in-garage shelter offered. The lid is 1/4″ thick steel plate with additional structural tubing to provide extra strength. The single-piece lid is bigger than the frame of the saferoom opening and sits over the framework, not down within the frame.
Our lid system is MUCH stronger than the typical 2-piece lid system provided by everybody else and provides more than adequate ventilation to the occupants. FlatSafe was the first to encase lands in ready-mix concrete to counteract buoyancy and floatation. The FlatSafe shelter design does not remove from a homeowner’s usable garage floor space.
FlatSafe below ground storm shelters permit easy entry and exit, provides a powerful system for leaving with debris onto the lid, and leaves Glenpool residence with the peace of mind that they have an extremely large probability of surviving a direct hit from an EF5 tornado.
Read Real Testimonials From Tornado Survivors
Since 2003, FlatSafe has established itself as the innovator in the in-garage, low profile, below ground storm shelters industry. Many FlatSafe shelters have taken a direct hit from an EF5 tornado and our clients rave about the shelter performance and their option to purchase. FlatSafe continues to push for new invention and continues to push for more stringent and thorough codes to protect the families in the vicinity of Glenpool.