1996 LRFD Manual for Engineered Wood Construction

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GUIDELINELRFD MANUALTO LRFDFORFORENGINEEREDSTRUCTURALWOODCOMPOSITECONSTRUCTIONLUMBER1515Contact ListOwner/ArchitectMajor fast food chains across the United States such asMcDonalds, Wendys, Hardees, and Taco Bell.Structural Engineer/ContractorOzark StructuresP.O. Box 4246Springfield, MO 658082PROJECT PROFILES: CASE STUDIESAMERICAN FOREST & PAPER ASSOCIATION
16 PROJECT PROFILES: CASE STUDIESIndustrialTYCO WarehouseProject DescriptionDuring the spring of 1992 TYCO Corporation, a majorproducer of children’s toys, completed 250,000 squarefeet of warehouse space for product storage and distributionnear Portland, Oregon.Two tilt-up concrete buildings with panelized woodroof systems, each measuring 250x500 feet, were erectedparallel to one another creating nearly six acres of storage/distributionfacility.The total cost of these buildings, including site workand lighting, was $11/square foot.Design ConsiderationsTilt-up concrete walls with panelized wood roof systemsare quite common, particularly in the western UnitedStates. What makes this project unique is that instead ofusing 4'x8' structural panels in the roof, 8'x8' panels wereused. This nearly doubled the roof installation speed.SiteThe site was level but wet. Even with wet soil theexpected loading did not require any special foundationdesign. Of greater significance was the fact that thesebuildings were located directly in line with a major runwayof Portland International Airport resulting in enhancedfire protection system requirements.Code ConformanceAs a storage facility in the Portland area the UBCspecifies a Type VN, B-2 Occupancy class. Due to itslocation and type of storage, fire considerations were extremelyimportant. These buildings were considered Class4 high pile commodity storage facilities. In addition, theflammability of the materials stored and their location inthe flight path of a major airport required sprinklers to bespaced at nearly twice the typical density along with specialsmoke removal equipment. Actual fire tests wereconducted in the buildings to convince the Fire Marshallthat a fire and its resultant smoke would not conflict withair traffic control.The buildings were designed as a box system(250x500-feet) in a Zone 3 seismic area. Factory MutualI-90 psf wind uplift forces were specified. In addition,the engineer designed for a condition between ExposureClass B and C, 95 mph wind speeds. These wind speedsAMERICAN WOOD COUNCIL
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Page 6 and 7: iNotationAGross areaA nNet area, ne
Page 8 and 9: iiiP uCompressive or bearing force
Page 10 and 11: vGlossaryAdjusted resistance. The r
Page 12 and 13: viithickness (timbers), green shall
Page 14 and 15: ixPrefabricated wood I-joists. Pre-
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1996 LRFD Manual for Engineered Wood Construction

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