You need to unblock this content by setting your broser.
ブラウザーはこの内容をブロックしないように設定してください。
INFO:Why don't buildings fall down on windy days? Using math and physics, structural engineers work to ensure that structures like bridges and rollercoasters are sturdy enough to withstand stress and large amounts of weight. Their job is incredibly importand: the safety of the entire community they work for relies on them.
