Meeuws says a building of 100 sq meters (1,075 sq. feet) and 14 layers of plants could provide a daily diet of 200 grams (7 ounces) of fresh fruit and vegetables to the entire population of Den Bosch, about 140,000 people.
So that comes out to 280 kg/m^2, or 57 lb/ft^2? Sounds really high to me... AeroFarms claim 30 lbs/ft^2 (http://aerofarms.com/why/comparison/). Color me skeptical.