Technical Committee on Engineering Design in Wood
Subcommittee on General Design
Subcommittee on Sawn Lumber
Subcommittee on Glued-Laminated Timber
Subcommittee on Panel Products
Subcommittee on Fastenings
Subcommittee on Proprietary Structural Wood Products
Task Force on Seismic Design in Wood
Preface
1 Scope
2 Definitions, Symbols, Spacing Dimensions, and Reference
Publications
2.1 Definitions
2.2 Symbols
2.3 Spacing Dimensions
2.4 Reference Publications
3 Objectives and Design Requirements
3.1 Objective
3.2 Limit States
3.3 Design Requirements
3.3.1 Structural Adequacy
3.3.2 New or Special Systems of Design and
Construction
3.3.3 Structural Integrity
3.3.4 Basis of Design
3.3.5 Quality of Work
3.3.6 Design Drawings
4 General Design
4.1 Ultimate and Serviceability Limit States
4.1.1 Method of Analysis
4.1.2 Ultimate Limit States
4.1.3 Serviceability Limit States
4.1.4 Resistance Factors
4.2 Specified Loads, Load Effects, and Load Combinations
4.2.1 Buildings
4.2.2 Other Structures
4.2.3 Specified Loads
4.2.4 Load Combinations
4.3 Conditions and Factors Affecting Resistance
4.3.1 General
4.3.2 Load Duration Factor, K[D]
4.3.3 Service Condition Factor, K[S]
4.3.4 Preservative and Fire-Retardant Treatment
Factor, K[T]
4.3.5 System Factor, K[H]
4.3.6 Size Factor, K[Z]
4.3.7 Lateral Stability Factor, K[L]
4.3.8 Reduction in Cross-Section
4.4 Resistance to Seismic Loads
4.5 Serviceability Requirements
4.5.1 Modulus of Elasticity
4.5.2 Elastic Deflection
4.5.3 Permanent Deformation
4.5.4 Ponding
4.5.5 Vibration
5 Sawn Lumber
5.1 Scope
5.2 Materials
5.2.1 Identification of Lumber
5.2.2 Lumber Grades and Categories
5.2.3 Finger-Joined Lumber
5.2.4 Remanufactured Lumber
5.2.5 Mixed Grades
5.3 Specified Strengths
5.3.1 Visually Stress-Graded Lumber
5.3.2 Machine Stress-Rated and Machine Evaluated
Lumber
5.4 Modification Factors
5.4.1 Load Duration Factor, K[D]
5.4.2 Service Condition Factor, K[S]
5.4.3 Treatment Factor, K[T]
5.4.4 System Factor, K[H]
5.4.5 Size Factor, K[Z]
5.5 Strength and Resistance
5.5.1 General
5.5.2 Sizes
5.5.3 Continuity
5.5.4 Bending Moment Resistance
5.5.5 Shear Resistance
5.5.6 Compressive Resistance Parallel to Grain
5.5.7 Compressive Resistance Perpendicular to Grain
5.5.8 Compressive Resistance at an Angle to Grain
5.5.9 Tensile Resistance Parallel to Grain
5.5.10 Resistance to Combined Bending and Axial Load
5.5.11 Decking
5.5.12 Preserved Wood Foundations
5.5.13 Sawn Lumber Design for Specific Truss
Applications
6 Glued-Laminated Timber (Glulam)
6.1 Scope
6.2 Materials
6.2.1 Stress Grades
6.2.2 Appearance Grades
6.3 Specified Strengths
10.2.2 Bolts, Lag Screws, Split Rings, and Shear
Plate Connectors (General Requirements)
10.3 Split Ring and Shear Plate Connectors
10.3.1 General
10.3.2 Service Condition Factor
10.3.3 Distance Factors
10.3.4 Lumber Thickness
10.3.5 Lag Screw Connector Joints
10.3.6 Lateral Resistance
10.4 Bolts
10.4.1 General
10.4.2 Member Thickness
10.4.3 Placement of Bolts in Joints
10.4.4 Lateral Resistance
10.4.5 Combined Lateral and Axial Resistance
10.5 Drift Pins
10.5.1 General
10.5.2 Prebored Holes
10.5.3 Drift Pin Points
10.5.4 Drift Pin Length
10.5.5 Size and Placement of Drift Pins in Joints
10.5.6 Lateral Resistance
10.6 Lag Screws
10.6.1 General
10.6.2 Placement of Lag Screws in Joints
10.6.3 Penetration of Lag Screws
10.6.4 Side Members
10.6.5 Withdrawal Resistance
10.6.6 Lateral Resistance
10.7 Timber Rivets (also known as Glulam Rivets)
10.7.1 General
10.7.2 Lateral Resistance
10.7.3 Withdrawal Resistance
10.8 Truss Plates
10.8.1 General
10.8.2 Design
10.8.3 Factored Resistance of Truss Plates
10.8.4 Lateral Slip Resistance
10.9 Nails and Spikes
10.9.1 General
10.9.2 Joint Configuration
10.9.3 Joint Design
10.9.4 Lateral Resistance
10.9.5 Withdrawal Resistance
10.10 Joist Hangers
10.10.1 General
10.10.2 Design
10.10.3 Factored Resistance of Joist Hangers
11 Timber Piling
11.1 Scope
11.2 Materials
11.2.1 Preservative Treatment
11.2.2 Untreated Piling
11.3 Specified Strengths
11.4 Modification Factors
11.5 Strength and Resistance
11.5.1 General
11.5.2 Piles as Compression Members
11.5.3 Effective Length
11.5.4 Embedded Portion
11.5.5 Unembedded Portion
12 Pole-Type Construction
12.1 Scope
12.1.1 Round Poles
12.1.2 Sawn Timbers
12.2 Materials
12.2.1 Preservative Treatment
12.2.2 Short Poles
12.3 Specified Strengths
12.4 Modification Factors
12.5 Strength and Resistance
12.5.1 General
12.5.2 Poles as Compression Members
12.5.3 Poles as Bending Members
13 Proprietary Structural Wood Products
13.1 Scope
13.2 Prefabricated Wood I-Joists
13.2.1 General
13.2.2 Materials
13.2.3 Specified Strengths and Moduli of Elasticity
13.2.4 Modification Factors
13.2.5 Strength and Resistance
13.2.6 Fastenings
13.3 Type 3 (Proprietary) Design-Rated OSB Panels
13.3.1 Manufacture
13.3.2 Panel Identification and Certificates of
Conformance
13.3.3 Basic Structural Capacities
13.3.4 Specified Capacities
13.3.5 Design Methods
13.4 Structural Composite Lumber Products
13.4.1 General
13.4.2 Adhesives and Binder Systems
13.4.3 Specified Strengths and Moduli of Elasticity
13.4.4 Modification Factors
13.4.5 Strength and Resistance
13.4.6 Fastenings
Appendix A - Additional Information and Alternative Procedures