curious chickee
Songster
I know it is 10-12" roost space, about 25-30cm per bird. Try to make the roosts the same height. I like mine about 4ft off the ground, a little over a meter I believe.  The pole I used is for closets about 10 cm diameter. 
I made my run as big as I could the more room the happier the chickens.
3 meters or 3 ft?
If meters,you can run a pole along one wall which I think is 4-5 birds per meter. So about 12-20 birds. Make sure you have a ladder or ramp to let them hop up. I like the ladder because some of the birds can roost on the top or 2nd from top rungs. More roost space more birds.
I would try to get a 5m x 5m run if possible.
Sorry if my math is off trying to convert in my mind and understanding
	
		
			
		
		
	
				
			I made my run as big as I could the more room the happier the chickens.
3 meters or 3 ft?
If meters,you can run a pole along one wall which I think is 4-5 birds per meter. So about 12-20 birds. Make sure you have a ladder or ramp to let them hop up. I like the ladder because some of the birds can roost on the top or 2nd from top rungs. More roost space more birds.
I would try to get a 5m x 5m run if possible.
Sorry if my math is off trying to convert in my mind and understanding
 
	 
 
		 
 
		 
 
		
 
 
		 
	 
 
		
 
 
		
 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		