http://www.teachengineering.org/view_lesson.php?url=collection/cub_/lessons/cub_brid/cub_brid_lesson02.xmllessontext/xmlIntegrated Teaching and Leaning Program and Laboratory, beambrainstormbridgecivil engineercolumnconcretedead loaddesigncompressioncompressive strengthcross-sectional areaforcegirderlive loadloadload combinationspiersteelstrengthstructuretensiontensile strengthultimate loadBrainstormingCompressive strengthCross-sectional areaDesignEngineerEngineeringEngineering designForceGirdersLoadMemberPiersTensile strength

Students learn about the types of possible loads, how to calculate ultimate load combinations, and investigate the different sizes for the beams (girders) and columns (piers) of simple bridge design. Students learn the steps that engineers use to design bridges: understanding the problem, determining the potential bridge loads, calculating the highest possible load, and calculating the amount of material needed to resist the loads.

Engineers who design structures must completely understand the problem to be solved, which includes the complexities of the site and the customer needs. To design for safety and longevity, engineers consider the different types of loads, how they are applied and where. Engineers often aim for a design that is strongest and lightest possible — one with the highest strength to weight ratio.List several examples of loads that could affect a bridge. Explain why knowledge about various loads or forces is important in bridge design.Describe the process that an engineer uses to design a bridge, including determining loads, calculating the highest load, and calculating the amount of material to resist the loads.20TeachEngineering.orgJonathan S. GoodeJoe FriedrichsenNatalie MachChristopher ValentiDenali LanderDenise W. CarlsonMalinda Schaefer Zarskehttp://www.teachengineering.org/collection/cub_/lessons/cub_brid/cub_brid_lesson02_worksheet.dochttp://www.teachengineering.org/collection/cub_/lessons/cub_brid/cub_brid_lesson02_worksheet.pdfhttp://www.teachengineering.org/collection/cub_/lessons/cub_brid/cub_brid_lesson02_worksheetas.dochttp://www.teachengineering.org/collection/cub_/lessons/cub_brid/cub_brid_lesson02_worksheetas.pdfACI Committee 318, Building Code Requirements for Structural Concrete (ACI 318-02) and Commentary (ACI 318R-02): An ACI Standard. American Concrete Institute: Farmington Hills, MI, 2002.AISC Committee on Manuals and Textbooks, Manual of Steel Construction: Load and Resistance Factor Design, Third Edition. American Institute of Steel Construction, 2001.http://www.wsdot.wa.gov/projects/sr16narrowsbridge/glossary/http://www.dot.ca.gov/http://www.dictionary.comHibbeler, R.C. Mechanics of Materials, Third Edition. Prentice Hall: Upper Saddle River, NJ, 1997.http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=16451Uniform Building Code. International Conference of Building Officials: Whittier, CA, 1991.S11417AAInternational_Technology_Education_Association-ITEA_STL_StandardsTechnologyF. The selection of designs for structures is based on factors such as building laws and codes, style, convenience, cost, climate, and function. 68S11417ADInternational_Technology_Education_Association-ITEA_STL_StandardsTechnologyI. Buildings generally contain a variety of subsystems.68S11424D2ColoradoSciencea. Predict and evaluate the movement of an object by examining the forces applied to it 88United StatesCopyright 2012 - Integrated Teaching and Leaning Program and Laboratory, University of Colorado at Boulderhttp://www.teachengineering.org/policy_ipp.phphttp://www.teachengineering.org/2012-01-208Teacher