I am building a rather large cart for use in my kitchen. Due to the dimensions of the room the top (marble) is about 5' 7" long, 14" wide and is quite heavy (estimated 150 pounds).
My largest concern is how narrow this top is making the center of gravity close enough to the edge that this could be toppled sideways by my three year old. My thinking is that if I place the wheels offset a bit - say 18 to 24 inches wide - this should counteract this risk. Anyone have a chart, etc to describe how wide I need to make this to be safe?
EDIT - I'm thinking that the top for this cart would be 36 inches tall.
EDIT - Based on the discussion here I went with locking casters on one end and fixed casters on the other along with a 24 inch wide base. We also tried pulling the completed unit over. It felt like it took about 100-120 pounds to get any motion on the lateral face. If necessary I also left space on the bottom for a counterweight.