Design of Wood Structures-ASD/LRFD

by Breyer, Donald; Fridley, Kenneth; Pollock, Jr., David; Cobeen, Kelly

• ISBN13: 9780071455398
• ISBN10: 0071455396
• Edition: 6th
• Format: Hardcover
• Copyright: 2007-01-05
• Publisher: McGraw-Hill Professional

Summary

Updated to reflect the new 2006 Building Code, new NDS standards, and ASCE load standardWood continues to be the major building material in residential structuresAudience: Civil Engineers and architects, and students

Author Biography

Donald E. Breyer is a Professor of Engineering Technology and Civil Engineering at California Polytechnic University in Pomona California. He actively serves as a member of the NDS Committee of the American Forest and Paper Association and LRFD Engineered Wood Committee.

Kenneth J. Fridley is Head of Department of Civil and Environmental Engineering, The University of Alabama, Tuscaloosa, AL.

Kelly E. Cobeen operates her own Structural Engineering firm in San Francisco, California.

David G. Pollock, Jr. is with the Department of Civil and Environmental Engineering, Washington State University, Pullman Washington.

Table of Contents

Preface	ix
Nomenclature	xiii
Abbreviations	xvi
Wood Buildings and Design Criteria	1	(1)
Introduction	1	(1)
Types of Buildings	2	(2)
Required and Recommended References	4	(3)
Building Codes and Design Criteria	7	(1)
ASD and LRFD	8	(1)
Organization of the Text	9	(1)
Structural Calculations	10	(2)
Detailing Conventions	12	(1)
Fire-Resistive Requirements	12	(1)
Industry Organizations	13	(1)
References	13
Design Loads	1	(1)
Introduction	1	(2)
Dead Loads	3	(4)
Live Loads	7	(7)
Snow Loads	14	(7)
Soil Loads and Hydrostatic Pressure	21	(1)
Loads due to Fluids	21	(1)
Rain Loads	21	(1)
Flood Loads	22	(1)
Self-straining Loads	22	(1)
Wind Loads---Introduction	23	(5)
Wind Forces---Main Wind Force Resisting System	28	(9)
Wind Forces---Components and Cladding	37	(5)
Seismic Forces---Introduction	42	(5)
Seismic Forces	47	(14)
Seismic Forces---Primary System	61	(7)
Seismic Forces---Wall Components	68	(5)
Load Combinations	73	(5)
Serviceability/Deflection Criteria	78	(6)
References	84	(1)
Problems	85
Behavior of Structures under Loads and Forces	1	(1)
Introduction	1	(1)
Structures Subject to Vertical Loads	1	(4)
Structures Subject to Lateral Forces	5	(7)
Lateral Forces in Buildings with Diaphragms and Shearwalls	12	(6)
Design Problem: Lateral Forces on One-Story Building	18	(15)
Design Problem: Lateral Forces on Two-Story Building	33	(20)
References	53	(1)
Problems	53
Properties of Wood and Lumber Grades	1	(1)
Introduction	1	(1)
Design Specification	2	(3)
Methods of Grading Structural Lumber	5	(2)
In-Grade Versus Clear Wood Design Values	7	(2)
Species and Species Groups	9	(2)
Cellular Makeup	11	(1)
Moisture Content and Shrinkage	12	(8)
Effect of Moisture Content on Lumber Sizes	20	(1)
Durability of Wood and the Need for Pressure Treatment	21	(3)
Growth Characteristics of Wood	24	(2)
Sizes of Structural Lumber	26	(3)
Size Categories and Commercial Grades	29	(4)
General Notation	33	(6)
Wet Service Factor CM	39	(1)
Load Duration Factor CD (ASD Only)	40	(4)
Time Effect Factor A (LRFD Only)	44	(1)
Size Factor CF	45	(1)
Repetitive Member Factor Cr	46	(1)
Flat Use Factor Ctu	47	(1)
Temperature Factor Ct	47	(1)
Incising Factor Cl	48	(1)
Resistance Factor φ (LRFD Only)	48	(1)
Format Conversion Factor KF (LRFD Only)	49	(1)
Design Problem: Adjusted Design Values	50	(10)
Future Directions in Wood Design	60	(1)
References	61	(1)
Problems	62
Structural Glued Laminated Timber	1	(1)
Introduction	1	(1)
Sizes of Glulam Members	1	(3)
Resawn Glulam	4	(1)
Fabrication of Glulams	5	(6)
Grades of Glulam Members	11	(5)
Adjustment Factors for Glulam	16	(3)
Design Problem: Adjusted Design Values	19	(4)
References	23	(1)
Problems	23
Beam Design	1	(1)
Introduction	1	(1)
Bending	2	(12)
Lateral Stability	14	(9)
Adjusted Bending Design Value Summary	23	(6)
Shear	29	(7)
Deflection	36	(2)
Design Summary	38	(2)
Bearing at Supports	40	(7)
Design Problem: Sawn Beam	47	(7)
Design Problem: Rough-Sawn Beam Using ASD	54	(2)
Design Problem: Notched Beam	56	(2)
Design Problem: Sawn-Beam Analysis	58	(4)
Design Problem: Glulam Beam with Full Lateral Support	62	(6)
Design Problem: Glulam Beam with Lateral Support at 8 ft-0 in.	68	(4)
Design Problem: Glulam Beam with Lateral Support at 48 ft-0 In.	72	(3)
Design Problem: Glulam with Compression Zone Stressed in Tension	75	(4)
Cantilever Beam Systems	79	(4)
Lumber Roof and Floor Decking	83	(2)
Fabricated Wood Components	85	(9)
References	94	(1)
Problems	95
Axial Forces and Combined Bending and Axial Forces	1	(1)
Introduction	1	(1)
Axial Tension Members	2	(5)
Design Problem: Tension Member	7	(4)
Columns	11	(8)
Detailed Analysis of Slenderness Ratio	19	(6)
Design Problem: Axially Loaded Column	25	(5)
Design Problem: Capacity of a Glulam Column	30	(6)
Design Problem: Capacity of a Bearing Wall	36	(3)
Built-Up Columns	39	(3)
Combined Bending and Tension	42	(5)
Design Problem: Combined Bending and Tension	47	(5)
Combined Bending and Compression	52	(7)
Design Problem: Beam-Column	59	(5)
Design Problem: Beam-Column Action in a Stud Wall Using LRFD	64	(9)
Design Problem: Glulam Beam-Column Using ASD	73	(7)
Design for Minimum Eccentricity	80	(1)
Design Problem: Column with Eccentric Load Using ASD	81	(6)
References	87	(1)
Problems	88
Wood Structural Panels	1	(1)
Introduction	1	(2)
Panel Dimensions and Installation Recommendations	3	(2)
Plywood Makeup	5	(3)
Species Groups for Plywood	8	(3)
Veneer Grades	11	(2)
Exposure Durability Classifications	13	(1)
Plywood Grades	14	(3)
Other Wood Structural Panels	17	(3)
Roof Sheathing	20	(3)
Design Problem: Roof Sheathing	23	(4)
Floor Sheathing	27	(3)
Design Problem: Floor Sheathing	30	(2)
Wall Sheathing and Siding	32	(4)
Stress Calculations for Wood Structural Panels	36	(11)
References	47	(1)
Problems	47
Diaphragms	1	(1)
Introduction	1	(1)
Basic Diaphragm Action	2	(5)
Shear Resistance	7	(9)
Diaphragm Chords	16	(4)
Design Problem: Roof Diaphragm	20	(8)
Distribution of Lateral Forces in a Shearwall	28	(4)
Collector (Strut) Forces	32	(5)
Diaphragm Deflections	37	(6)
Diaphragms with Interior Shearwalls	43	(4)
Interior Shearwalls with Collectors	47	(4)
Diaphragm Flexibility	51	(3)
References	54	(1)
Problems	55
Shearwalls	1	(1)
Introduction	1	(1)
Basic Shearwall Action	2	(1)
Shearwalls Using Wood Structural Panels	3	(6)
Other Sheathing Materials	9	(2)
Shearwall Chord Members	11	(2)
Design Problem: Shearwall	13	(9)
Alternate Shearwall Design Methods	22	(11)
Anchorage Considerations	33	(1)
Vertical (Gravity) Loads	34	(1)
Lateral Forces Parallel to a Wall	35	(4)
Shearwall Deflection	39	(6)
Lateral Forces Perpendicular to a Wall	45	(2)
References	47	(1)
Problems	47
Wood Connections-Background	1	(1)
Introduction	1	(1)
Types of Fasteners and Connections	1	(6)
Yield Model for Laterally Loaded Fasteners	7	(3)
Factors Affecting Strength in Yield Model	10	(3)
Dowel Bearing Strength	13	(4)
Plastic Hinge In Fastener	17	(4)
Yield Limit Mechanisms	21	(5)
References	26	(1)
Problems	26
Nailed and Stapled Connections	1	(1)
Introduction	1	(1)
Types of Nails	2	(3)
Power-Driven Nails and Staples	5	(2)
Yield Limit Equations for Nails	7	(7)
Applications of Yield Limit Equations	14	(8)
Adjustment Factors for Laterally Loaded Nails	22	(7)
Design Problem: Nail Connection for Knee Brace	29	(5)
Design Problem: Top Plate Splice	34	(8)
Design Problem: Shearwall Chord Tie	42	(4)
Design Problem: Laterally Loaded Toenail	46	(4)
Design Problem: Laterally Loaded Connection in End Grain	50	(2)
Nail Withdrawal Connections	52	(6)
Combined Lateral and Withdrawal Loads	58	(1)
Spacing Requirements	59	(4)
Nailing Schedule	63	(1)
References	63	(1)
Problems	64
Bolts, Lag Bolts, and Other Connectors	1	(1)
Introduction	1	(1)
Bolt Connections	2	(3)
Bolt-Yield Limit Equations for Single Shear	5	(9)
Bolt Yield Limit Equations for Double Shear	14	(4)
Adjustment Factors for Bolts	18	(12)
Tension and Shear Stresses at a Multiple Fastener Connection	30	(4)
Design Problem: Multiple-Bolt Tension Connection	34	(6)
Design Problem: Bolted Chord Splice for Diaphragm	40	(7)
Shear Stresses in a Beam at a Connection	47	(2)
Design Problem: Bolt Connection for Diagonal Brace	49	(6)
Lag Bolt Connections	55	(4)
Yield Limit Equations for Lag Bolts	59	(3)
Adjustment Factors for Lag Bolts in Shear Connections	62	(5)
Design Problem: Collector (Strut) Splice with Lag Bolts	67	(6)
Lag Bolts in Withdrawal	73	(3)
Combined Lateral and Withdrawal Loads	76	(1)
Split Ring and Shear Plate Connectors	77	(6)
References	83	(1)
Problems	83
Connection Details and Hardware	1	(1)
Introduction	1	(1)
Connection Details	1	(18)
Design Problem: Beam-to-Column Connection	19	(8)
Cantilever Beam Hinge Connection	27	(2)
Prefabricated Connection Hardware	29	(4)
References	33
Diaphragm-to-Shearwall Anchorage	1	(1)
Introduction	1	(1)
Anchorage Summary	1	(5)
Connection Details---Diaphragm to Wood-Frame Wall	6	(9)
Connection Details---Diaphragm to Concrete or Masonry Walls	15	(16)
Subdiaphragm Anchorage of Concrete and Masonry Walls	31	(6)
Design Problem: Subdiaphragm	37	(8)
References	45
Advanced Topics in Lateral Force Design	1	(1)
Introduction	1	(1)
Seismic Forces---Regular Structures	1	(2)
Seismic Forces---Irregular Structures	3	(11)
Overturning---Background	14	(1)
Overturning---Review	14	(5)
Overturning---Wind	19	(4)
Overturning---Seismic	23	(6)
Lateral Analysis of Nonrectangular Buildings	29	(5)
Rigid Diaphragm Analysis	34	(11)
Additional Topics in Diaphragm Design	45	(1)
References	45
Appendix A. Equivalent Uniform Weights of Wood Framing	1	(1)
Appendix B. Weights of Building Materials	1	(1)
Appendix C. Selected Tables and Figures from the International Building Code, 2006 Edition	1	(1)
Appendix D. SI Units	1	(1)
Index	1