We have a Chevy Express passenger van. It has barn style doors on the side and in the back. We want to build maybe a shelf or table that folds out of it or build in some storage compartments in the door. We are curious to how much weight the door hinges can safely bear. I see a lot of people put a fold out table and a cook stove which then would have a pot with something in it, so obviously it can hold a fair amount of weight but anybody have an idea specifically how much we can put on that without ruining the hinges? Thanks.