storm / tornado shelter in my garage floor here in Texas
Ok guys, with all the crazy weather going on, I am thinking about adding a tornado shelter to my house, I am in Texas (DFW Metro).
Here is my idea, saw cut the floor in my garage let’s say, 3ft x 10ft, remove the existing slab, excavate about 5-6ft deep, pour a new slab, build the walls with bricks and cover the top opening (current garage floor) with a solid metal door (custom).
Questions from my end:
1) Do I need to pull a permit for this?
2) If I do the slab, I am thinking 5" thick, #4 or #5 rebar every 10" OC as grid, should be plenty or any other ideas?
3) Do need to put gravel and a vapor barrier under the new slab?
Since the opening will be in the middle of the garage away from the exterior walls by about 3-4ft anything else I should consider?
the idea is to keep the costs under control and not to have a shelter that is outside where you need to run to weather in the middle of the night, something available also for kids to climb into and close the door, some ventilation I am sure I need to come up with down the road, any other ideas or hints what to do / not to do?
Thank you for your help in advance!!!