Yeah good point I guess shower doors sometimes are tempered. Not all of them of course I've seen them cut <-BVA joke. 
 
I've heard from a glass guy that he's had big (thick) sheets of tempered just pop sitting in his truck overnight. I'm certainly not a glass expert only heard forces on the edges of a tempered panes are a risk. 
		
	
		
		
		
		
			
		
		
		
		
	
		
		
	
	
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