Above-ground shelter

1. An above-ground storm shelter comprising:

a. sidewalls manufactured in modular segments in at least one width adapted to be joined together to form a desired size of shelter, each segment having planar sidewalls comprised of two panels, an outer panel and an inner panel, and at least two linear structural members maintaining them a fixed distance apart;

b. at least one segment of said modular segments having defined therein a ventilation port with an inner and outer cover means for preventing projectiles from entering the shelter during a storm event while allowing equalization of pressure;

c. at least one double-swing door, each of which is hinged to swing freely inwardly or outwardly;

d. at least one door bar to be received at each end thereof within a pair of first end brackets affixed to the inner panels adjacent to the at least one door and also to be received within at least one holder affixed to each of the at least one door wherein the door bar is configured to axially rotate to cooperatively interlock, with each of the pair of first end brackets, thereby preventing the at least one door from swinging inwardly and outwardly once interlocked;

e. a roof adapted to be affixed thereto; and

f. an affixation means for securely attaching the shelter to a floor.

2. The shelter of claim 1 , wherein the at least one door bar further comprises a second door bar having a profile adapted to be received within a pair of second end brackets affixed to the inner panel adjacent to the at least one door and within an additional holder of the at least one holder affixed to each of the at least one door, the second door bar is configured to axially rotate to cooperative interlock with each of the pair of second end brackets, thereby preventing the at least one door from swinging inwardly and outwardly once interlocked.

3. The shelter of claim 1 , the affixation means comprising:

a. at least one base plate affixed along the bottom of at least one segment;

b. at least one retention plate adapted to fit over the at least one base plate and having an extending portion extending beyond the base plate with a hole defined through the extending portion; and

c. a fastener passing through the hole and adapted to engage the floor to affix the at least one retention plate thereto,

whereby, the cooperative action of the retention plate and the fastener securing the base plate and the attached shelter to the floor to prevent it from being lifted off during a storm event and reducing leverage on the fastener.

4. The shelter of claim 3 , the affixation means further comprising a shim portion disposed at an outer edge of the retention plate, the shim portion having substantially the same thickness as the base plate.

5. The shelter of claim 1 , the ventilation port further comprising:

a. a passage defined between the inner and outer panels;

b. an outer cover means having—

i. an outer protective plate with dimensions at least as large as the passage,

ii. the outer protective plate affixed a distance from the outer panel and defining an air passage having an area at least half of the periphery of the ventilation port, and

iii. an outer protective plate orientation and affixation adapted to prevent the accumulation of debris due to horizontal surfaces;

c. an inner cover means having—

i. an inner protective grate affixed onto the inner panel, at least as large as the passage; and

ii. access to the passage within the ventilation port wherein debris may be removed from the passage to maintain airflow into the shelter.

6. An above-ground storm shelter comprising:

a. sidewalls manufactured in modular segments in at least one width adapted to be joined together to form a desired size of shelter, each segment having planar sidewalls comprised of two panels, an outer panel and an inner panel, and two structural members maintaining them a fixed distance apart;

b. at least one double-swing door, each of which is hinged to swing freely inwardly or outwardly;

c. at least one door bar received at each end thereof within a pair of end brackets having a profile affixed to the inner panel adjacent to the at least one door and also received within at least one holder affixed to each of the at least one door, the at least one door bar having a profile adapted to be received within each end bracket, and within each holder on each of the at least one double-swing door, wherein the at least one door bar is configured to axially rotate to cooperatively interlock with each of the pair of end brackets and holders and releasably lock the at least one door bar into place;

d. a ventilation port having—

i. a passage defined between the inner and outer panels,

ii. an outer protective plate at least as large as the passage, the outer protective plate

affixed a distance from the outer panel and defining an air passage having an area at least half of the periphery of the passage, and

iii. an inner protective grate affixed onto the inner panel, at least as large as the passage;

e. and an attachment means having—

i. at least one base plate affixed along the bottom of at least one of the segments;

ii. at least one retention plate adapted to fit over the at least one base plate and have an extending portion extending beyond the at least one base plate with a hole defined through the extending portion; and

iii. a fastener passing through the hole and adapted to engage the floor to affix the at least one retention plate thereto.