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TABLE OF CONTENTS Preface Chapter 1 ? Introduction, Wood Properties, Species and Grades * Introduction * The Project Approach * Typical Structural Components of Wood Buildings * Typical Structural Systems in Wood Buildings * Roof Framing layouts * Floor Framing Layouts * Wall Framing Layouts * Wood Structural Properties * Tree Cross-section * Advantages and Disadvantages of Wood as a Structural Material * Factors Affecting Wood Strength * Species and Species Group * Moisture Content * Seasoning of Lumber * Duration of Loading * Size Classifications of Sawn Lumber * Nominal Dimensions and Actual Size of Sawn Lumber * Wood Defects * Orientation of Wood Grain * Ambient Temperature * Lumber Grading * Types of Grading * Visual Grading * Machine Stress Rating (MSR) and Machine Evaluated Lumber (MEL) * Stress Grades * Grade Stamps * Shrinkage of Wood Example 1-1: Shrinkage in Wood Members * Density of wood * Units of Measurement * Building Codes * NDS Code and NDS Supplement (NDS-S) * References * Problems Chapter 2 ? Introduction to Structural Design Loads * Design Loads * Load Combinations * Dead loads * Combined Dead and Live Loads on Sloped Roofs Example 2-1: Design loads for sloped roofs * Combined Dead and Live Loads on Stair Stringers Example 2-2: Design loads for stair stringers * Tributary Widths and Tributary Areas Example 2-3: Calculation of tributary widths and areas * Live Loads * Roof Live Load Example 2-4: Roof load calculations * Snow Load Example 2-5: Roof snow load calculation * Snow Drift and Sliding Snow Loads * Floor Live Loads * Floor Live Load Reduction Example 2-6: Column load calculation * Deflection Criteria * Lateral Loads * Wind Loads * Wind Load Calculation Procedures * Simplified Wind Load Calculation Method Example 2-7: Simplified wind load calculation for main wind force resisting system (MWFRS) * Seismic Loads Example 2-8: Seismic load calculation * References * Problems Chapter 3 - Allowable Stress Design Method for Sawn Lumber and Glued Laminated Timber (GLULAM) * Allowable stress Design (ASD) Method * NDS Tabulated Design Stresses * Stress Adjustment or ?C? Factors Example 3-1: Determination of the load duration factors in load combinations * Procedure for Calculating Allowable Stresses * Modulus of Elasticity for Sawn Lumber * Glued Laminated Timber (Glulam) * End Joints in Glulam * Grades of Glulam * Wood Species Used in Glulam * Stress Class System * NDS Supplement Tables 5A, 5A-Exapanded, and 5B * Allowable Stress Calculation Examples Example 3-2: Allowable stresses in sawn lumber ? dimension lumber Example 3-3: Allowable stresses in sawn lumber ? timbers Example 3-4: Allowable stresses in Glulam * Load Combinations and Governing Load Duration Factor * Normalized Load Method Example 3-5: Determination of the governing load combination ? roof beams Example 3-6: Determination of the governing load combination ? columns * References * Problems Chapter 4 - Design and Analysis of Beams and Girders * Design of Joists, Beams and Girders * Definition of Beam Span * Layout of Joists, Beams and Girders * Design Procedure for Joists, Beams and Girders Example 4-1: Design of joists, beams and girders * Analysis of Joists, Beams and Girders Example 4-2: Analysis of a wood beam * More Design Examples Example 4-3: Design of a Glulam girder Example 4-4: Design of stair treads and stringers * Continuous Beams and Girders * Beams and Girders with Overhangs or Cantilever * Sawn Lumber Decking Example 4-5: Design of sawn lumber decking * Miscellaneous Stresses in Wood Members * Shear Stress in Notched Beams * Bearing Stress Parallel to Grain of a Wood Member * Bearing Stress at an Angle to Grain of a Wood Member * Sloped Rafter Connection Example 4-6: Calculation of bearing stresses at a sloped rafter-to-stud wall connection * Pre-engineered Lumber - Parallel Strand Lumber (PSL) and Laminated Veneer Lumber (LVL) Example 4-7: Header beam design using pre-engineered lumber * Flitch Beams Example 4-8: Flitch beam design * Floor Vibrations * Floor Vibration Design Criteria Example 4-9: Floor vibrations on floor framing with sawn lumber Example 4-10: Floor vibrations with pre-engineered joists * References * Problems Chapter 5 - Wood Members under Axial and Bending Loads * Introduction * Pure Axial Tension: Case #1 Example 5-1: Analysis of a sawn lumber tension member Example 5-2: Analysis of a Glulam tension member * Design of Tension Members Example 5-3: Design of a wood tension member Example 5-4: Design of a wood tension member * Axial Tension plus Bending: Case #2 Example 5-5: Axial tension plus bending ? truss bottom chord * Euler Critical Buckling Stress * Pure Axial Compression: Case #3 Example 5-6: Column axial load capacity in pure compression * Built-up Columns Example 5-7: Axial load capacity of a built-up column * P-delta Effects in Members under Combined Axial Compression and Bending Loads * Axial Compression plus Bending: Case #4 Example 5-8: Combined axial compression plus bending ? truss top chord Example 5-9: Combined axial compression plus bending ? exterior stud wall * Eccentrically Loaded Columns * Practical Considerations for Roof Truss Design * Types of Roof Trusses * Bracing and Bridging of Roof Trusses * References * Problems Chapter 6 - Roof and Floor Sheathing under Vertical Loads and Lateral Loads (Horizontal Diaphragms) * Introduction * Plywood Grain Orientation * Plywood Species and Grades * Span rating * Roof Sheathing: Analysis and Design * Floor Sheathing: Analysis and Design * Panel Attachment Example 6-1: Roof and Floor Sheathing under gravity loads * Extended use of the IBC Tables for gravity loads on sheathing Example 6-2: Extended use of the IBC Tables for gravity loads on sheathing * Horizontal Diaphragms Example 6-3: Horizontal Diaphragm Forces * Horizontal Diaphragm Strength * Openings in Horizontal Diaphragms * Chords and Drag Struts Example 6-4: Design of Horizontal Diaphragm Elements Example 6-5: Design of Horizontal Diaphragm with wood blocking Example 6-6: Horizontal Diaphragms with Interior and Exterior Shear walls * Non-rectangular Diaphragms * References * Problems Chapter 7 - Vertical Diaphragms under Lateral Loads (Shear Walls) * Introduction * Wall Sheathing Types * Plywood as a Shear wall * Shear Wall Analysis * Shear wall Aspect Ratios Example 7-1: Definition of a Shear wall Example 7-2: Multi-story Shear wall Aspect Ratio * Shear wall Overturning Analysis * Shear wall Chord Forces: Tension Case * Shear wall Chord Forces: Compression Case * Shear wall Design Procedure Example 7-3: Design of Shearwalls Example 7-4: Difference in Shearwall Capacity for Wind and Seismic Design * References * Problems Chapter 8 ? Connections * Introduction * Design Strength * Adjustment Factors Example 8-1: Group Action Factor: Wood-to-wood connection Example 8-2: Group Action Factor: Wood-to-steel connection Example 8-3: Geometry factor for a nailed connection Example 8-4: Geometry factor for a bolted connection * Base Design Values: Laterally Loaded connectors Example 8-5: Laterally Loaded Nail, Single Shear Example 8-6: Laterally Loaded Bolt, Double Shear Example 8-7: Laterally Loaded Lag Screw perpendicular to the grain Example 8-8: Knee Brace Connection * Base Design Values: Connectors Loaded in Withdrawal Example 8-9: Fasteners loaded in withdrawal * Combined Lateral and Withdrawal loads Example 8-10: Fastener loaded by lateral and withdrawal loads Example 8-11: Diaphragm fastener loaded by lateral and withdrawal loads * Pre-engineered connectors * Practical considerations * References * Problems Chapter 9 ? Building Design Case Study * Introduction * Gravity Loads * Seismic Lateral Loads * Wind Loads * Components and Cladding Wind Loads * Roof Framing Design * Analysis of Roof Truss * Design of Truss Web Tension Members * Design of Truss Web Compression Members * Design of Truss Bottom Chord Members * Design of Truss Top Chord Members * Net Uplift Load on Roof Truss * Second Floor Framing design * Design of a Typical Floor Joist * Design of Glulam Floor Girder * Design of Header Beams * Design of a Typical Ground Floor Column * Design of a Typical Exterior Wall Stud * Design of Roof and Floor Sheathing for Gravity Loads * Design of Roof and Floor Sheathing for Lateral Loads * Overturning Analysis of Shearwalls: Shearwall Chord Forces * Overturning Analysis of Shearwalls ? Maximum Force in Tension Chord * Overturning Analysis of Shearwalls ? Maximum Force in Compression Chord * Forces in Horizontal Diaphragm Chords, Drag Struts, and Lapsplices * Design of Horizontal Diaphragm Chords, Drag Struts, and Lap Splices * Hold-down Anchors * Sill Anchors * Design of Shearwall Chords * References Appendix A ? Weights of Building Materials Appendix B ? Allowable Uniform Loads on Floor Joists Allowable Axial Loads on Columns Combined Axial and Bending Loads on Wall Studs Index
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