SIMPLIFIED DESIGN of WOOD STRUCTURES Architecture Newly updated—the most accessible, thorough introduction to the basics of wood structure design No architect’s education would be complete without a basic understanding of how structures respond to the action of forces and how these forces affect the performance of various building material (wood, steel, concrete, etc.). In continuous publication for over sixty years, this standard guide to structural design with wood has now been updated to include current design practices, standards, and consideration of new wood products. Written to be easily understood by readers with limited experience in engineering mechanics, structural analysis, or advanced mathematics, the book now features: Consideration of the LRFD method of structural design in addition to the ASD method Updated coverage conforming to current building codes, design practices, and industry standards Expanded treatment of wood products beyond sawn lumber More examples and a wider sweep of systems and products Equally suited to classroom use or independent study, Simplified Design of Wood Structures, Sixth Edition stands as a valuable resource that no architect or builder should be without. The Parker/Ambrose Series of Simplified Design Guides has been providing simple, concise solutions to common structural and environmental design problems for more than seven decades.

Table of Contents:
Preface to the Sixth Edition xi Preface to the First Edition xv Introduction 1 1 Structural Uses of Wood 12 1.1 Sources of Wood 13 1.2 Tree Growth 13 1.3 Density of Wood 14 1.4 Defects in Lumber 15 1.5 Seasoning of Wood 16 1.6 Nominal and Dressed Sizes 17 1.7 Use Classification of Structural Lumber 17 1.8 Grading of Structural Lumber 18 1.9 Fabricated Wood Products 18 2 Design Issues and Methods 20 2.1 Design Goals 20 2.2 Methods of Investigation and Design 23 2.3 Choice of Design Method 25 3 Structural Investigation 27 3.1 General Concerns 27 3.2 Forces and Loads 28 3.3 Direct Stress 30 3.4 Kinds of Stress 31 3.5 Deformation 32 3.6 Elastic Response and Limit 32 3.7 Inelastic Behavior and Ultimate Strength 33 3.8 Modulus of Elasticity 33 3.9 Permissible Values for Design 35 4 Design Data and Criteria 36 4.1 General Concerns 36 4.2 Reference Design Values for Allowable Stress Design (ASD) 37 4.3 Adjustment of Design Values 41 4.4 Modification for Loading with Relation to Grain Direction 45 4.5 Design Controls for LRFD 47 5 Beam Functions 50 5.1 General Considerations 50 5.2 Moments 52 5.3 Beam Loads and Reaction Forces 57 5.4 Beam Shear 60 5.5 Bending Moment 65 5.6 Tabulated Values for Beam Behavior 78 5.7 Multiple-Span Beams 82 6 Behavior of Beams 86 6.1 Shear in Beams 86 6.2 Bending in Beams 93 6.3 Deflection 97 6.4 Bearing 101 6.5 Buckling of Beams 103 6.6 Unsymmetrical Bending 105 6.7 Behavior Considerations for LRFD 109 7 Design of Beams 117 7.1 Design Procedure 117 7.2 Beam Design Examples 118 7.3 Joists and Rafters 121 7.4 Alternative Spanning Elements 126 8 Wood Decks 129 8.1 Board Decks 129 8.2 Wood Fiber Decks 132 8.3 Plywood Decks 132 8.4 Spanning Capability of Decks 133 9 Wood Columns 135 9.1 Slenderness Ratio for Columns 135 9.2 Compression Capacity of Simple Solid Columns 136 9.3 Column Load Capacity, LRFD 145 9.4 Round Columns 147 9.5 Stud Wall Construction 148 9.6 Spaced Columns 150 9.7 Built-Up Columns 154 9.8 Columns with Bending 155 10 Connections for Wood Structures 166 10.1 Bolted Joints 166 10.2 Nailed Joints 176 10.3 Screws 179 10.4 Mechanically Driven Fasteners 181 10.5 Shear Developers 181 10.6 Split-Ring Connectors 182 10.7 Formed Steel Framing Elements 189 10.8 Concrete and Masonry Anchors 192 10.9 Plywood Gussets 192 10.10 Investigation of Connections, LRFD 194 11 Trusses 196 11.1 General Considerations 196 11.2 Types of Trusses 199 11.3 Bracing for Trusses 199 11.4 Loads on Trusses 201 11.5 Investigation for Internal Forces in Planar Trusses 203 11.6 Design Forces for Truss Members 221 11.7 Combined Actions in Truss Members 221 11.8 Truss Members and Joints 222 11.9 Timber Trusses 223 11.10 Manufactured Trusses 224 12 Miscellaneous Wood Products and Elements 226 12.1 Engineered Wood Products 226 12.2 Glued Laminated Structural Member 227 12.3 Structural Composite Lumber 229 12.4 Wood Structural Panels 231 12.5 Plywood 232 12.6 Prefabricated Wood I-Joists 237 12.7 Built-Up Panel and Lumber Beams 238 12.8 Flitched Beams 239 12.9 Pole Structures 244 13 Wood Structures for Lateral Bracing 246 13.1 Application of Wind and Earthquake Forces 247 13.2 Horizontal Diaphragms 250 13.3 Vertical Diaphragms (Shear Walls) 262 13.4 Investigation and Design of Wood-Framed Shear Walls 270 13.5 Trussed Bracing for Wood Frames 277 13.6 Special Lateral Bracing 284 14 General Considerations for Building Structures 288 14.1 Choice of Building Construction 288 14.2 Structural Design Standards 289 14.3 Loads for Structural Design 289 14.4 Dead Loads 290 14.5 Building Code Requirements for Structures 292 14.6 Live Loads 294 14.7 Lateral Loads (Wind and Earthquake) 297 14.8 Load Combinations and Factors 301 14.9 Determination of Design Loads 302 14.10 Structural Planning 302 14.11 Building Systems Integration 303 14.12 Economics 303 15 Building Design Examples 306 15.1 Building One: Single-Story Light Wood Frame 307 15.2 Building Two: Multistory Light Wood Frame 327 15.3 Building Three: Masonry and Timber Structure 334 15.4 Building Four: Steel and Wood Structure 351 Appendix A: Properties of Sections 354 Appendix B: Study Aids 369 Appendix C: Answers to Problems 381 Glossary 387 References 390 Index 393