DCALC,DesignCalcs,Seismic Design,Bridge Design Software,Structural Dynamics,Structural EngineeringAbout Us

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DesignCalcs, Inc was established in 1991 as a small mail order business by Karl Hanson, S.E., P.E., who wrote all of the programs. After earning a science teaching degree and, later, a degree in structural engineering, his career path eventually led to a position as the Structural Technical Director at a successful consulting firm. Over the years, DCALC has evolved from the accumulated experience of designing many projects in the Chicago land area, including bridges, post-tensioned concrete parking structures and various building types. DCALC has been used by hundreds of firms, principally in Illinois, and has been sold almost entirely by word-of-mouth.

Still actively involved as a structural engineer, Karl has recently written a series of novels. "The Third Thaw" is currently a three book series, published by Wido Publishing. For more information about Karl's novels, visit his author's webpage at https://kjhanson.net

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