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Comparing steel and concrete as possible building materials entails deciding where stress will go on the structure. Use concrete for good compression resistance and steel for good expansion resistance withinstruction from an experienced builder in this free video on carpentry and construction. Expert: Robert Markey Bio: Robert Markey earned his BS in Physics from MIT in 1969 and his MS in Computer Science from the University of Massachusetts in 1982. Filmmaker: EquilibrioFilms Erik…