Preconstruction Database is designed to help construction estimators develop conceptual estimates. The product includes 13 construction cost assemblies (such as low-rise, multiunit residential, mid- to high-rise office building, retail shell and hotel). Each cost assembly contains 11 mini-assemblies that cover major building components such as foundations, substructure, superstructure, exterior closure, roofing, mechanical and electrical. The database contains rate tables and material costs for 21 major U.S. cities. www.timberline.com

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