When a taller wall or a higher level of soil or both come into play the thickness should increase to 10 inches.
													
																	Ideal underground concrete bunker wall thickness. 
									
	
		
	
																	Design consideration of bunkers with circular bottom. 
																	It s all concrete the roof walls everything. 
																	The value of hoop tension is given by the formula. 
																	Next interior walls poured at a 12 inch thickness with 162 cubic yards of 4 000 psi concrete formed 12 octagonal rooms. 
															
													
									
	
		
	
																	D diameter of the bunker. 
																	Most modern homes use concrete as their foundation and it s the choice for military bunkers as well. 
																	For design of bunkers with circular cross section vertical walls are subjected to a hoop tension along the diameter of the bunker. 
																	In general poured concrete basement walls that are 8 feet tall or less and have no more than 7 feet of soil pressing against them from the outside function well at a thickness of 8 inches. 
															
													
									
	
		
	
																	It s cheap it s quick pour so it doesn t take forever to install. 
																	The eight sided shape of the rooms was incorporated into the design for. 
																	P h horizontal component of pressure at a depth h from the top. 
																	T h 0 5p h d. 
															
													
									
	
		
	
																	In the bottom right corner of the picture you see the homeowner holding a flashlight. 
																	Concrete is the best material to use for your survival bunker. 
																	If you are investing in a long term survival bunker i recommend using concrete.