We can take a truck at 35 MPH
When the city permitted the building our "hut" is in they required the construction to be able to handle the impact of a large truck at 35 MPH....I feel like its fort knox some times....lots of cement, rebar, etc covered by a little stuco....but the way people drive through the strip center \ parking lot I'm in....I'm kind of glad
Sorry tough - no studies that i'm aware of