Timber Construction Manual, 6th EditionISBN: 978-0-470-54509-6
Hardcover
672 pages
July 2012
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PREFACE xi
1 TIMBER CONSTRUCTION 1
1.1 Introduction / 1
1.2 Materials / 1
1.3 Structural Systems / 13
1.4 Economy / 27
1.5 Permanence / 32
1.6 Seasoning / 37
1.7 Handling, Storage, and Erection / 38
1.8 Conclusion / 40
2 WOOD PROPERTIES 42
2.1 Introduction / 42
2.2 Specific Gravity and Specific Weight of Commercial Lumber Species / 46
2.3 Dimensional Changes Due to Moisture and Temperature / 50
2.4 Thermal Insulating Properties / 53
2.5 Wood in Chemical Environments / 54
2.6 Acoustical Properties / 55
2.7 Electrical Properties / 55
2.8 Coefficient of Friction / 56
2.9 Conclusion / 56
3 TIMBER DESIGN 57
3.1 Introduction / 57
3.2 Loads / 58
3.3 Design Values / 73
3.4 Adjustment Factors / 74
3.5 Deflection / 92
3.6 Camber / 95
3.7 Ponding / 98
3.8 Conclusion / 100
4 TIMBER BEAMS 102
4.1 Introduction / 102
4.2 Structural Evaluation of Beams / 102
4.3 Simple Beams / 105
4.4 Continuous Members / 117
4.5 Biaxial Bending (Bending about Both Axes) / 122
4.6 Torsion / 130
4.7 Conclusion / 133
5 TIMBER COLUMNS AND TENSION MEMBERS 134
5.1 Introduction / 134
5.2 Column Design Criteria / 134
5.3 Rectangular Columns / 135
5.4 Round Columns / 140
5.5 Tapered Columns / 140
5.6 Spaced Columns / 141
5.7 Built-Up Columns / 144
5.8 Columns with Flanges / 146
5.9 Tension Members / 147
5.10 Conclusion / 148
6 TIMBER BEAM-COLUMNS AND TENSION BEAMS 149
6.1 Introduction / 149
6.2 General Equation for Beam-Columns / 150
6.3 Centric Axial Compression and Side Load Bending about Both Axes / 156
6.4 Centric Axial Compression and Side Load Bending about Strong Axis Only / 161
6.5 Eccentric Axial Compression Only / 165
6.6 Axial Compression Eccentricity in Strong Direction Only / 165
6.7 Columns with Side Brackets / 169
6.8 Combined Axial Tension and Bending / 170
6.9 Conclusion / 173
7 TAPERED BEAMS 174
7.1 Introduction / 174
7.2 Tapered Beam Design / 176
7.3 Beams with Tapered End Cuts / 183
7.4 Conclusion / 188
8 CURVED GLULAM BEAMS 189
8.1 Introduction / 189
8.2 Curved Beams with Constant Depth / 195
8.3 Pitched and Tapered Curved Beams / 200
8.4 Pitched and Tapered Curved Beams with Mechanically Attached Haunch / 223
8.5 Conclusion / 232
9 GLULAM ARCHES 233
9.1 Introduction / 233
9.2 Preliminary Design Procedure / 233
9.3 Conclusion / 249
10 HEAVY TIMBER DECKING 251
10.1 Introduction / 251
10.2 Installation Requirements / 251
10.3 Design Formulas / 255
10.4 Section Properties / 256
10.5 Decking Design Values / 257
10.6 Conclusion / 259
11 CONNECTIONS IN TIMBER STRUCTURES 260
11.1 Introduction / 260
11.2 Connection Detailing Principles / 260
11.3 Types of Fasteners / 264
11.4 Reference Design Values for Fasteners / 272
11.5 Adjustment Factors / 274
11.6 Conclusion / 283
12 MEMBER CAPACITY AT CONNECTIONS 284
12.1 Introduction / 284
12.2 Member Capacity at Connections Loaded Perpendicular-to-Grain / 284
12.3 Member Capacity at Connections Loaded Parallel-to-Grain / 291
12.4 Member Capacity at Connections Loaded at an Angle to Grain / 307
12.5 Conclusion / 308
13 DOWEL-TYPE FASTENERS 309
13.1 Introduction / 309
13.2 Dowel-Type Fasteners Loaded Laterally / 309
13.3 Dowel-Type Fasteners Loaded in Withdrawal / 328
13.4 Dowel-Type Fasteners Loaded Laterally and in Withdrawal / 330
13.5 Conclusion / 334
14 SHEAR PLATES AND SPLIT RINGS 335
14.1 Introduction / 335
14.2 Connectors in Side Grain / 336
14.3 Timber Connectors in End Grain / 347
14.4 Conclusion / 352
15 MOMENT SPLICES 353
15.1 Introduction / 353
15.2 Shear Transfer / 355
15.3 Moment Transfer / 355
15.4 Conclusion / 370
16 LOAD AND RESISTANCE FACTOR DESIGN 371
16.1 Introduction / 371
16.2 Design Values and Adjustment Factors / 372
16.3 Design Checks / 374
16.4 Conclusion / 381
17 TIMBER BRIDGES 382
17.1 Introduction / 382
17.2 Types of Timber Bridges / 383
17.3 Advantages of Glued Laminated Timber / 389
17.4 Preservative Treatments / 390
17.5 Wearing Surfaces / 391
17.6 Guardrails / 392
17.7 Design Methods / 393
17.8 Conclusion / 395
18 LRFD BRIDGE DESIGN 396
18.1 Introduction / 396
18.2 Longitudinal Stringers / 399
18.3 Transverse Glulam Deck Panels / 418
18.4 Longitudinal Deck (with Stiffeners) / 425
18.5 Conclusion / 432
19 ASD BRIDGE DESIGN 433
19.1 Introduction / 433
19.2 Longitudinal Stringers (Girders) / 436
19.3 Interconnected Transverse Deck Panels / 447
19.4 Non-Interconnected Transverse Deck Panels / 447
19.5 Longitudinal Deck (with Stiffeners) / 457
19.6 Static Design of Guardrail System / 463
19.7 Conclusion / 474
20 FIRE SAFETY 475
20.1 Introduction / 475
20.2 Types of Construction / 476
20.3 Lessons from Actual Fires / 476
20.4 Performance of Wood in Fire / 478
20.5 Wood versus Steel / 479
20.6 Heavy Timber Construction / 482
20.7 Fire-Resistance-Rated Construction / 483
20.8 Use of Stock Glulam Beams in Fire Rated Construction / 494
20.9 Fire Retardant Treatment / 495
20.10 Conclusion / 495
APPENDIX A DESIGN EXAMPLES 497
Introduction / 498
APPENDIX B REFERENCE INFORMATION 594
B.1 Beam Diagrams and Formulas / 595
B.2 Typical Fastener Dimensions and Yield Strengths / 617
B.3 Structural Glued Laminated Timber Reference Design Values / 623
REFERENCES 630
INDEX 641
