Posted: 17/11/2014 at 19:05
Edd with your calculations you have given a raised bed width of 16 ft. No raised bed should be wider than 4 ft or you will have to climb on it to cultivate! The whole point of a raised bed is you never compact it by walking on it.
I was just going off the dimensions given by DrGreenThumb31 and a top soil calculator.
"Im working with 16 ft by 16ft raise bed"
"@Welshonion thank you very much! So lets go 18 inches then"
I should have perhaps used the word settle instead of compact.
I do agree with the 4ft wide beds though. I presume that he is trying to get the largest area possible with it being on concrete.