2001 ASD Supplements - unprotected PDF - American Wood Council

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SW-26APPENDICESA.1 Design ExampleBasic DesignWood structural panel diaphragms and shear walls inone-story building seismic and wind loadings. 25 psf roofdesign snow loadGiven:In Figure A.1, building dimensions and openings asshown. Exterior walls consist of light-framed woodsheathedshear walls. All framing members are hem-firlumber unless noted otherwise. The floor is framed with11-7/8-inch I-joists and interior post-and-beam system.Interior posts are supported by pad footing and exteriorwalls are supported by continuous concrete wall footings.Determine:1. Seismic load and wind load on roof diaphragmalong each direction (determined in another analysis).2. Design unit shear in roof diaphragm along each direction.3. Roof structural panel layout and fastener schedule.4. Calculate chord forces.5. Connections between roof diaphragm and walls.6. Diaphragm deflection (N-S direction only).7. Shear in shear walls and shear panel fastener schedule(East and West walls only).8. Drag strut forces and drag strut connections (Eastand West walls only).9. Hold-down forces and hold-down connections (Eastand West walls only).Figure A.1 Building Plan View andTypical Section of ExteriorWallsb = 110'Plan ViewN45'45'20' x 20' overhead doorTypical Section of Exterior Walls2'24'L = 240'Roof diaphragm2X8 Hem-fir stud wall15/32" Sheathing, Exposure I20' high windows70'40'Step 1.Seismic Load and Wind Load on Roof Diaphragm Along EachDirectionDetailed seismic force and wind force calculations arebeyond the scope of this Supplement.For this example, assume the following:V seismic N-SV seismic E-WV wind N-S= 53,768 lb.= 37,752 lb.= 61,519 lb.V wind E-W= 28,196 lb.APA – The Engineered Wood Association
ASD WOOD STRUCTURAL PANEL SHEAR WALL AND DIAPHRAGM SUPPLEMENTSW-27Step 2.Design Unit Shear in Roof Diaphragm Along Each DirectionThe diaphragm is considered flexible if its maximumlateral deformation is more than two times the averageshear wall deflection of the associated story. Without furthercalculations, assume a flexible diaphragm here:Total DiaphragmDesign Load 1Diaphragm DesignUnit Shear (lb./ft.)N-S V seismic N-S = 53,768 lb. ÷ 2 ÷ 110 ft. = 250V wind N-S = 61,519 lb. ÷ 2 ÷ 110 ft. = 280E-W V seismic E-W = 37,752 lb. ÷ 2 ÷ 240 ft. = 79V wind E-W = 28,196 lb. ÷ 2 ÷ 240 ft. = 591Determined in Step 1, these numbers came from a specific design with certain assumptions.Step 3.Roof Structural Panel Layout and Fastener ScheduleARoof sheathing thickness has been previously selectedbased on snow load requirements.Figure A.2 Roof Framing and Sheathing Layout (Northwest Quadrant)APPENDICESNC.L.3'x8' panels (first row along the 240' exterior wall)7'-0"8'-0"27'-6"8'-0"8'-0"8'-0"8'-0"27'-6"C.L.8'-0"30'-0" 30'-0" 30'-0" 30'-0"4'x8' panels (typ.)All framing members to be Hem-fir and sheathing to be 15/32" wood structural panels with 8d common nails.APA – The Engineered Wood Association
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SUPPLEMENTStructural LumberASDALLOW
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SUPPLEMENTStructural LumberASDALLOW
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ASD WOOD STRUCTURAL FRAME CONSTRUCT
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ASD STRUCTURAL LUMBER SUPPLEMENTL-1
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SUPPLEMENTStructural GluedLaminated
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ASD STRUCTURAL GLUED LAMINATED TIMB
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ASD STRUCTURAL GLUED LAMINATED TIMB
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GL-2DESIGNER FLOWCHART1.1 Flowchart
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GL-4INTRODUCTION TO STRUCTURAL GLUE
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GL-6INTRODUCTION TO STRUCTURAL GLUE
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GL-8ALLOWABLE STRESS AND STIFFNESS3
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GL-10ALLOWABLE STRESS AND STIFFNESS
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GL-12ALLOWABLE STRESS AND STIFFNESS
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GL-14DESIGN ADJUSTMENT FACTORS4.1 G
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GL-16DESIGN ADJUSTMENT FACTORS4.9 V
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GL-18DESIGN ADJUSTMENT FACTORSTable
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GL-30CAPACITY SELECTION TABLES5.1 G
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GL-32CAPACITY SELECTION TABLESTable
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GL-56OTHER CONSIDERATIONS6.1 Genera
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GL-58OTHER CONSIDERATIONSTable 6.3
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GL-60OTHER CONSIDERATIONSAMERICAN W
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GL-62LOAD AND SPAN TABLES7.1 Genera
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GL-64LOAD AND SPAN TABLES7.2 Load-S
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GL-66LOAD AND SPAN TABLESTable 7.2A
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GL-76LOAD AND SPAN TABLESAMERICAN W
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GL-78DESIGN EXAMPLES8.1 GeneralGene
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GL-80SECTION PROPERTIES9.1 Cross Se
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GL-82SECTION PROPERTIESTable 9.1(Co
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SUPPLEMENTTimber Polesand PilesASDA
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ASD WOOD TIMBER FRAME POLES CONSTRU
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ASD WOOD TIMBER FRAME POLES CONSTRU
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ASD TIMBER POLES AND PILES SUPPLEME
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SUPPLEMENTWood StructuralPanelsASDA
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ASD WOOD STRUCTURAL PANELS SUPPLEME
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SP-2DESIGNER FLOWCHART1.1 Flowchart
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SP-4INTRODUCTION TO WOOD STRUCTURAL
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SP-10DESIGN CAPACITIES3.1 GeneralPa
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SP-12DESIGN CAPACITIESShear Through
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SP-14DESIGN CAPACITIESTable 3.2Pane
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SP-16DESIGN CAPACITIESTable 3.3Pane
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SP-18DESIGN CAPACITIESTable 3.4.1Ad
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2001 ASD Supplements - unprotected PDF - American Wood Council

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