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<p>In the early 80’s we pretty much proved that one could calculate everything needed to build a 5-story poured concrete and rebar building from the foundation all the way to the roof using nothing more than a 4-function calculator. Painful, sure, and required one to have the ever-popular DIN handbook (Europe) but doable :). </p>
<p>Of course, you could be 80+ like my father in law and still be practicing Civil Engineering…</p>