Well the first multi-story car park recently collapsed it would seem because it was not designed to carry the full weight of all the cars that were parked in it. A building that was perfectly safe when parked full of cars in 1970...had to carry vehicles at least one third heavier by 2020....and now we have loads of electric cars that weigh a minimum of one third heavier than even that again some double that weight or more that's something to think about...eh?...we need to fix this...