A Resource Guide to Engineering Timber Wood Projects
Heavy Timber & Wood Engineering Resources
In the world of construction and civil engineering, timber remains staple and a tradition of timeless and essential material. Its natural characteristics, strength, durability, adaptability, and sustainability have cemented its place in the annals of building history. Recognizing the ever-evolving demands of the industry and the need for precise knowledge in wood construction, we've collected the resources below as a guide aid engineering with heavy timber and to help guide your timber construction projects.
Design Values for Joists and Rafters
This document contains reference tables of design values for joist and rafters, when using a variety of common lumber wood species.
Published by the AWC. (29 pages)
The American Wood Council (AWC) is a non-profit organization that provides information and resources for the design and construction of wood-framed buildings. It was formed with the mission to increase the use of wood in construction through the development of design tools and building codes, standards, and guidelines. They represent the North American softwood lumber industry and provide technical resources, including design software, engineering guides, and standards for architects, engineers, builders, and other construction professionals.
The AWC is a membership organization that is made up of companies and organizations involved in the production and distribution of wood products, as well as companies that provide services to the wood products industry, such as engineering firms and lumberyards. They were established in the 1940s, as a way to provide technical support to the wood products industry and promote the use of wood as a construction material. The organization also advocates for the use of wood in construction at the national and international levels, and works with code-making and standard-setting bodies to ensure that building codes and standards are favorable to the use of wood.
Construction
General Construction Techniques
- Heavy Timber Construction
- Tongue-&-Groove Roof Decking
- Framing Basics
- Prescriptive Residential Wood Deck Guide
- Bark Siding Installation Guide
Lumber Data & Specifications
Connection Guides
Engineering
- Design Values for Joists and Rafters
- Span Tables for Joists and Rafters
- Lumber Design Values and Framing Spans
- National Design Specification (NDS) 2018 Supplement
- Beam Design Formulas with Shear and Moment Diagrams
- Interior Shear Walls
- Design Load Tables for Solid-Sawn Lumber Beams and Headers
- Design Load Tables for Wood Columns (Posts)
- Design Load Tables for Wood Studwalls Subjected to Wind Pressure
- Manual for Engineered Wood Construction
- Size-Adjusted Design Values for Western Lumber
Properties
- Common Lumber Defects
- WWPA Grade Stamps
- Natural Wood Siding
- Paneling Basics
- Specifying Western Lumber
- Standard Patterns
- Lumber Storage
- Structural Glued Lumber
Performance
- Inscribed vs. Separate Structures in the WFCM
- Calculating the Fire Resistance of Wood Members and Assemblies
- Component Additive Method (CAM) for Calculating and Demonstrating Assembly Fire Resistance
- Fire-Resistance-Rated Wood-Frame Wall and Floor/Ceiling Assemblies
- Flame Spread Performance of Wood Products Used for Interior Finish
- Meeting Residential Energy Requirements with Wood-Frame Construction
- Post Frame Buildings
- Design of Wood Frame Structures for Permanence
- Details for Conventional Wood Frame Construction
- Fire Design Specification for Wood Construction
- Plank-and-Beam Framing for Residential Buildings
- Preventing & Controlling Mold
- Cleaning Mold on Wood
- Mold, Housing & Wood
Douglas Fir
- Douglas Fir Properties
- Douglas Fir Technical Specifications
- Douglas Fir – Coast Forest
- Douglas Fir (SEC)
- Performances of Douglas Fir in Real Outdoor Use Conditions
Western Red Cedar
- Western Red Cedar Properties
- Western Red Cedar Technical Specifications
- Western Red Cedar Designer Handbook
- Western Red Cedar – A Giant Among Giants
- How to Specify Western Red Cedar
- Western Red Cedar – An American Wood
- Growth, Properties & Uses of Western Red Cedar
- Western Red Cedar Quick Facts
- Western Red Cedar (Tropix 7)
Eastern White Pine
- Eastern White Pine Properties
- Eastern White Pine Technical Specifications
- Eastern White Pine from the USA
- Anatomical and Chemical Responses of Eastern White Pine to Blue-Stain Inoculation
- Identification and Evaluation of Defects in Eastern White Pine
- Eastern White Pine (USFS)
Specialty Timbers
Span Tables for Joists and Rafters
A series of tables referencing live load values for determining correct spans for joists and rafters.
Published by the AWC. (52 pages)
The American Wood Council (AWC) is a non-profit organization that provides information and resources for the design and construction of wood-framed buildings. It was formed with the mission to increase the use of wood in construction through the development of design tools and building codes, standards, and guidelines. They represent the North American softwood lumber industry and provide technical resources, including design software, engineering guides, and standards for architects, engineers, builders, and other construction professionals.
The AWC is a membership organization that is made up of companies and organizations involved in the production and distribution of wood products, as well as companies that provide services to the wood products industry, such as engineering firms and lumberyards. They were established in the 1940s, as a way to provide technical support to the wood products industry and promote the use of wood as a construction material. The organization also advocates for the use of wood in construction at the national and international levels, and works with code-making and standard-setting bodies to ensure that building codes and standards are favorable to the use of wood.
Construction
General Construction Techniques
- Heavy Timber Construction
- Tongue-&-Groove Roof Decking
- Framing Basics
- Prescriptive Residential Wood Deck Guide
- Bark Siding Installation Guide
Lumber Data & Specifications
Connection Guides
Engineering
- Design Values for Joists and Rafters
- Span Tables for Joists and Rafters
- Lumber Design Values and Framing Spans
- National Design Specification (NDS) 2018 Supplement
- Beam Design Formulas with Shear and Moment Diagrams
- Interior Shear Walls
- Design Load Tables for Solid-Sawn Lumber Beams and Headers
- Design Load Tables for Wood Columns (Posts)
- Design Load Tables for Wood Studwalls Subjected to Wind Pressure
- Manual for Engineered Wood Construction
- Size-Adjusted Design Values for Western Lumber
Properties
- Common Lumber Defects
- WWPA Grade Stamps
- Natural Wood Siding
- Paneling Basics
- Specifying Western Lumber
- Standard Patterns
- Lumber Storage
- Structural Glued Lumber
Performance
- Inscribed vs. Separate Structures in the WFCM
- Calculating the Fire Resistance of Wood Members and Assemblies
- Component Additive Method (CAM) for Calculating and Demonstrating Assembly Fire Resistance
- Fire-Resistance-Rated Wood-Frame Wall and Floor/Ceiling Assemblies
- Flame Spread Performance of Wood Products Used for Interior Finish
- Meeting Residential Energy Requirements with Wood-Frame Construction
- Post Frame Buildings
- Design of Wood Frame Structures for Permanence
- Details for Conventional Wood Frame Construction
- Fire Design Specification for Wood Construction
- Plank-and-Beam Framing for Residential Buildings
- Preventing & Controlling Mold
- Cleaning Mold on Wood
- Mold, Housing & Wood
Douglas Fir
- Douglas Fir Properties
- Douglas Fir Technical Specifications
- Douglas Fir – Coast Forest
- Douglas Fir (SEC)
- Performances of Douglas Fir in Real Outdoor Use Conditions
Western Red Cedar
- Western Red Cedar Properties
- Western Red Cedar Technical Specifications
- Western Red Cedar Designer Handbook
- Western Red Cedar – A Giant Among Giants
- How to Specify Western Red Cedar
- Western Red Cedar – An American Wood
- Growth, Properties & Uses of Western Red Cedar
- Western Red Cedar Quick Facts
- Western Red Cedar (Tropix 7)
Eastern White Pine
- Eastern White Pine Properties
- Eastern White Pine Technical Specifications
- Eastern White Pine from the USA
- Anatomical and Chemical Responses of Eastern White Pine to Blue-Stain Inoculation
- Identification and Evaluation of Defects in Eastern White Pine
- Eastern White Pine (USFS)
Specialty Timbers
Lumber Design Values and Framing Spans
Selected lumber design values and span tables for Douglas Fir-Larch, Hem-Fir and Southern Pine grown in the U.S., and Canadian Spruce-Pine-Fir.
Published by the WWPA. (4 pages)
Note: a signup/account (free and fast process) is required to download and view WWPA documents.
Supported by Western lumber manufacturers, WWPA delivers lumber grading, quality control, technical, business information and product support services to sawmills as well as those who use Western softwood lumber products throughout the world.
Western Wood Products Association represents lumber manufacturers in the 12 Western states and Alaska. The largest lumber association in the region, WWPA provides service covering over 8 billion board feet of annual Western lumber production.
Services
WWPA provides services to Western mills in three areas: Quality Assurance, Technical Services and Market Services. Member mills have access and can guide Association activities in all three service areas. WWPA also provides nonmember quality assurance services, including grade inspection, heat-treating, remanufactured wood, and glued products.
Membership
WWPA mills produce more than 60% of the lumber manufactured in the West each year. The Member roster features the top independent lumber companies in North America, with mills that lead the industry in manufacturing technology, operating efficiencies and sales strategies.
Staffing
WWPA’s headquarters are located in Lake Oswego, OR. The Association’s field staff are recognized throughout the sawmilling industry, with each averaging more than two decades of lumber quality control experience. WWPA technical and product support professionals are the acknowledged experts in the use of Western lumber in construction. The statistical and product information created by the Association’s staff are sought by thousands of people each year.
Construction
General Construction Techniques
- Heavy Timber Construction
- Tongue-&-Groove Roof Decking
- Framing Basics
- Prescriptive Residential Wood Deck Guide
- Bark Siding Installation Guide
Lumber Data & Specifications
Connection Guides
Engineering
- Design Values for Joists and Rafters
- Span Tables for Joists and Rafters
- Lumber Design Values and Framing Spans
- National Design Specification (NDS) 2018 Supplement
- Beam Design Formulas with Shear and Moment Diagrams
- Interior Shear Walls
- Design Load Tables for Solid-Sawn Lumber Beams and Headers
- Design Load Tables for Wood Columns (Posts)
- Design Load Tables for Wood Studwalls Subjected to Wind Pressure
- Manual for Engineered Wood Construction
- Size-Adjusted Design Values for Western Lumber
Properties
- Common Lumber Defects
- WWPA Grade Stamps
- Natural Wood Siding
- Paneling Basics
- Specifying Western Lumber
- Standard Patterns
- Lumber Storage
- Structural Glued Lumber
Performance
- Inscribed vs. Separate Structures in the WFCM
- Calculating the Fire Resistance of Wood Members and Assemblies
- Component Additive Method (CAM) for Calculating and Demonstrating Assembly Fire Resistance
- Fire-Resistance-Rated Wood-Frame Wall and Floor/Ceiling Assemblies
- Flame Spread Performance of Wood Products Used for Interior Finish
- Meeting Residential Energy Requirements with Wood-Frame Construction
- Post Frame Buildings
- Design of Wood Frame Structures for Permanence
- Details for Conventional Wood Frame Construction
- Fire Design Specification for Wood Construction
- Plank-and-Beam Framing for Residential Buildings
- Preventing & Controlling Mold
- Cleaning Mold on Wood
- Mold, Housing & Wood
Douglas Fir
- Douglas Fir Properties
- Douglas Fir Technical Specifications
- Douglas Fir – Coast Forest
- Douglas Fir (SEC)
- Performances of Douglas Fir in Real Outdoor Use Conditions
Western Red Cedar
- Western Red Cedar Properties
- Western Red Cedar Technical Specifications
- Western Red Cedar Designer Handbook
- Western Red Cedar – A Giant Among Giants
- How to Specify Western Red Cedar
- Western Red Cedar – An American Wood
- Growth, Properties & Uses of Western Red Cedar
- Western Red Cedar Quick Facts
- Western Red Cedar (Tropix 7)
Eastern White Pine
- Eastern White Pine Properties
- Eastern White Pine Technical Specifications
- Eastern White Pine from the USA
- Anatomical and Chemical Responses of Eastern White Pine to Blue-Stain Inoculation
- Identification and Evaluation of Defects in Eastern White Pine
- Eastern White Pine (USFS)
Specialty Timbers
National Design Specification (NDS) 2018 Supplement
The NDS Supplement contains design values for sawn lumber, structural glued laminated timber, and round timber poles and piles.
Published by the AWC. (86 pages)
The American Wood Council (AWC) is a non-profit organization that provides information and resources for the design and construction of wood-framed buildings. It was formed with the mission to increase the use of wood in construction through the development of design tools and building codes, standards, and guidelines. They represent the North American softwood lumber industry and provide technical resources, including design software, engineering guides, and standards for architects, engineers, builders, and other construction professionals.
The AWC is a membership organization that is made up of companies and organizations involved in the production and distribution of wood products, as well as companies that provide services to the wood products industry, such as engineering firms and lumberyards. They were established in the 1940s, as a way to provide technical support to the wood products industry and promote the use of wood as a construction material. The organization also advocates for the use of wood in construction at the national and international levels, and works with code-making and standard-setting bodies to ensure that building codes and standards are favorable to the use of wood.
Construction
General Construction Techniques
- Heavy Timber Construction
- Tongue-&-Groove Roof Decking
- Framing Basics
- Prescriptive Residential Wood Deck Guide
- Bark Siding Installation Guide
Lumber Data & Specifications
Connection Guides
Engineering
- Design Values for Joists and Rafters
- Span Tables for Joists and Rafters
- Lumber Design Values and Framing Spans
- National Design Specification (NDS) 2018 Supplement
- Beam Design Formulas with Shear and Moment Diagrams
- Interior Shear Walls
- Design Load Tables for Solid-Sawn Lumber Beams and Headers
- Design Load Tables for Wood Columns (Posts)
- Design Load Tables for Wood Studwalls Subjected to Wind Pressure
- Manual for Engineered Wood Construction
- Size-Adjusted Design Values for Western Lumber
Properties
- Common Lumber Defects
- WWPA Grade Stamps
- Natural Wood Siding
- Paneling Basics
- Specifying Western Lumber
- Standard Patterns
- Lumber Storage
- Structural Glued Lumber
Performance
- Inscribed vs. Separate Structures in the WFCM
- Calculating the Fire Resistance of Wood Members and Assemblies
- Component Additive Method (CAM) for Calculating and Demonstrating Assembly Fire Resistance
- Fire-Resistance-Rated Wood-Frame Wall and Floor/Ceiling Assemblies
- Flame Spread Performance of Wood Products Used for Interior Finish
- Meeting Residential Energy Requirements with Wood-Frame Construction
- Post Frame Buildings
- Design of Wood Frame Structures for Permanence
- Details for Conventional Wood Frame Construction
- Fire Design Specification for Wood Construction
- Plank-and-Beam Framing for Residential Buildings
- Preventing & Controlling Mold
- Cleaning Mold on Wood
- Mold, Housing & Wood
Douglas Fir
- Douglas Fir Properties
- Douglas Fir Technical Specifications
- Douglas Fir – Coast Forest
- Douglas Fir (SEC)
- Performances of Douglas Fir in Real Outdoor Use Conditions
Western Red Cedar
- Western Red Cedar Properties
- Western Red Cedar Technical Specifications
- Western Red Cedar Designer Handbook
- Western Red Cedar – A Giant Among Giants
- How to Specify Western Red Cedar
- Western Red Cedar – An American Wood
- Growth, Properties & Uses of Western Red Cedar
- Western Red Cedar Quick Facts
- Western Red Cedar (Tropix 7)
Eastern White Pine
- Eastern White Pine Properties
- Eastern White Pine Technical Specifications
- Eastern White Pine from the USA
- Anatomical and Chemical Responses of Eastern White Pine to Blue-Stain Inoculation
- Identification and Evaluation of Defects in Eastern White Pine
- Eastern White Pine (USFS)
Specialty Timbers
Beam Design Formulas with Shear and Moment Diagrams
A guide to beam design for various load distributions.
Published by the AWC and AF&PA. (20 pages)
The American Wood Council (AWC) is a non-profit organization that provides information and resources for the design and construction of wood-framed buildings. It was formed with the mission to increase the use of wood in construction through the development of design tools and building codes, standards, and guidelines. They represent the North American softwood lumber industry and provide technical resources, including design software, engineering guides, and standards for architects, engineers, builders, and other construction professionals.
The AWC is a membership organization that is made up of companies and organizations involved in the production and distribution of wood products, as well as companies that provide services to the wood products industry, such as engineering firms and lumberyards. They were established in the 1940s, as a way to provide technical support to the wood products industry and promote the use of wood as a construction material. The organization also advocates for the use of wood in construction at the national and international levels, and works with code-making and standard-setting bodies to ensure that building codes and standards are favorable to the use of wood.
The American Forest & Paper Association (AF&PA) is a trade association that represents the forest products industry in the United States, which includes the pulp, paper, packaging, and wood products sectors. They were established in the early 20th century and have been representing the industry for more than a century. The organization’s mission is to promote the sustainable growth and use of wood and paper products, and to advocate for policies that support the forest products industry.
Construction
General Construction Techniques
- Heavy Timber Construction
- Tongue-&-Groove Roof Decking
- Framing Basics
- Prescriptive Residential Wood Deck Guide
- Bark Siding Installation Guide
Lumber Data & Specifications
Connection Guides
Engineering
- Design Values for Joists and Rafters
- Span Tables for Joists and Rafters
- Lumber Design Values and Framing Spans
- National Design Specification (NDS) 2018 Supplement
- Beam Design Formulas with Shear and Moment Diagrams
- Interior Shear Walls
- Design Load Tables for Solid-Sawn Lumber Beams and Headers
- Design Load Tables for Wood Columns (Posts)
- Design Load Tables for Wood Studwalls Subjected to Wind Pressure
- Manual for Engineered Wood Construction
- Size-Adjusted Design Values for Western Lumber
Properties
- Common Lumber Defects
- WWPA Grade Stamps
- Natural Wood Siding
- Paneling Basics
- Specifying Western Lumber
- Standard Patterns
- Lumber Storage
- Structural Glued Lumber
Performance
- Inscribed vs. Separate Structures in the WFCM
- Calculating the Fire Resistance of Wood Members and Assemblies
- Component Additive Method (CAM) for Calculating and Demonstrating Assembly Fire Resistance
- Fire-Resistance-Rated Wood-Frame Wall and Floor/Ceiling Assemblies
- Flame Spread Performance of Wood Products Used for Interior Finish
- Meeting Residential Energy Requirements with Wood-Frame Construction
- Post Frame Buildings
- Design of Wood Frame Structures for Permanence
- Details for Conventional Wood Frame Construction
- Fire Design Specification for Wood Construction
- Plank-and-Beam Framing for Residential Buildings
- Preventing & Controlling Mold
- Cleaning Mold on Wood
- Mold, Housing & Wood
Douglas Fir
- Douglas Fir Properties
- Douglas Fir Technical Specifications
- Douglas Fir – Coast Forest
- Douglas Fir (SEC)
- Performances of Douglas Fir in Real Outdoor Use Conditions
Western Red Cedar
- Western Red Cedar Properties
- Western Red Cedar Technical Specifications
- Western Red Cedar Designer Handbook
- Western Red Cedar – A Giant Among Giants
- How to Specify Western Red Cedar
- Western Red Cedar – An American Wood
- Growth, Properties & Uses of Western Red Cedar
- Western Red Cedar Quick Facts
- Western Red Cedar (Tropix 7)
Eastern White Pine
- Eastern White Pine Properties
- Eastern White Pine Technical Specifications
- Eastern White Pine from the USA
- Anatomical and Chemical Responses of Eastern White Pine to Blue-Stain Inoculation
- Identification and Evaluation of Defects in Eastern White Pine
- Eastern White Pine (USFS)
Specialty Timbers
Interior Shear Walls
This document describes how interior shear walls are designed to resist lateral loads.
Published by the AWC and AF&PA. (5 pages)
The American Wood Council (AWC) is a non-profit organization that provides information and resources for the design and construction of wood-framed buildings. It was formed with the mission to increase the use of wood in construction through the development of design tools and building codes, standards, and guidelines. They represent the North American softwood lumber industry and provide technical resources, including design software, engineering guides, and standards for architects, engineers, builders, and other construction professionals.
The AWC is a membership organization that is made up of companies and organizations involved in the production and distribution of wood products, as well as companies that provide services to the wood products industry, such as engineering firms and lumberyards. They were established in the 1940s, as a way to provide technical support to the wood products industry and promote the use of wood as a construction material. The organization also advocates for the use of wood in construction at the national and international levels, and works with code-making and standard-setting bodies to ensure that building codes and standards are favorable to the use of wood.
The American Forest & Paper Association (AF&PA) is a trade association that represents the forest products industry in the United States, which includes the pulp, paper, packaging, and wood products sectors. They were established in the early 20th century and have been representing the industry for more than a century. The organization’s mission is to promote the sustainable growth and use of wood and paper products, and to advocate for policies that support the forest products industry.
Construction
General Construction Techniques
- Heavy Timber Construction
- Tongue-&-Groove Roof Decking
- Framing Basics
- Prescriptive Residential Wood Deck Guide
- Bark Siding Installation Guide
Lumber Data & Specifications
Connection Guides
Engineering
- Design Values for Joists and Rafters
- Span Tables for Joists and Rafters
- Lumber Design Values and Framing Spans
- National Design Specification (NDS) 2018 Supplement
- Beam Design Formulas with Shear and Moment Diagrams
- Interior Shear Walls
- Design Load Tables for Solid-Sawn Lumber Beams and Headers
- Design Load Tables for Wood Columns (Posts)
- Design Load Tables for Wood Studwalls Subjected to Wind Pressure
- Manual for Engineered Wood Construction
- Size-Adjusted Design Values for Western Lumber
Properties
- Common Lumber Defects
- WWPA Grade Stamps
- Natural Wood Siding
- Paneling Basics
- Specifying Western Lumber
- Standard Patterns
- Lumber Storage
- Structural Glued Lumber
Performance
- Inscribed vs. Separate Structures in the WFCM
- Calculating the Fire Resistance of Wood Members and Assemblies
- Component Additive Method (CAM) for Calculating and Demonstrating Assembly Fire Resistance
- Fire-Resistance-Rated Wood-Frame Wall and Floor/Ceiling Assemblies
- Flame Spread Performance of Wood Products Used for Interior Finish
- Meeting Residential Energy Requirements with Wood-Frame Construction
- Post Frame Buildings
- Design of Wood Frame Structures for Permanence
- Details for Conventional Wood Frame Construction
- Fire Design Specification for Wood Construction
- Plank-and-Beam Framing for Residential Buildings
- Preventing & Controlling Mold
- Cleaning Mold on Wood
- Mold, Housing & Wood
Douglas Fir
- Douglas Fir Properties
- Douglas Fir Technical Specifications
- Douglas Fir – Coast Forest
- Douglas Fir (SEC)
- Performances of Douglas Fir in Real Outdoor Use Conditions
Western Red Cedar
- Western Red Cedar Properties
- Western Red Cedar Technical Specifications
- Western Red Cedar Designer Handbook
- Western Red Cedar – A Giant Among Giants
- How to Specify Western Red Cedar
- Western Red Cedar – An American Wood
- Growth, Properties & Uses of Western Red Cedar
- Western Red Cedar Quick Facts
- Western Red Cedar (Tropix 7)
Eastern White Pine
- Eastern White Pine Properties
- Eastern White Pine Technical Specifications
- Eastern White Pine from the USA
- Anatomical and Chemical Responses of Eastern White Pine to Blue-Stain Inoculation
- Identification and Evaluation of Defects in Eastern White Pine
- Eastern White Pine (USFS)
Specialty Timbers
Design Load Tables for Solid-Sawn Lumber Beams and Headers
This PDF provides load tables for headers and timber beams, including load totals for single 4x and 6x, as well as built-up double and triple 2x wood members from 3-14 ft. spans.
Published by the WWPA. (9 pages)
Note: a signup/account (free and fast process) is required to download and view WWPA documents.
Supported by Western lumber manufacturers, WWPA delivers lumber grading, quality control, technical, business information and product support services to sawmills as well as those who use Western softwood lumber products throughout the world.
Western Wood Products Association represents lumber manufacturers in the 12 Western states and Alaska. The largest lumber association in the region, WWPA provides service covering over 8 billion board feet of annual Western lumber production.
Services
WWPA provides services to Western mills in three areas: Quality Assurance, Technical Services and Market Services. Member mills have access and can guide Association activities in all three service areas. WWPA also provides nonmember quality assurance services, including grade inspection, heat-treating, remanufactured wood, and glued products.
Membership
WWPA mills produce more than 60% of the lumber manufactured in the West each year. The Member roster features the top independent lumber companies in North America, with mills that lead the industry in manufacturing technology, operating efficiencies and sales strategies.
Staffing
WWPA’s headquarters are located in Lake Oswego, OR. The Association’s field staff are recognized throughout the sawmilling industry, with each averaging more than two decades of lumber quality control experience. WWPA technical and product support professionals are the acknowledged experts in the use of Western lumber in construction. The statistical and product information created by the Association’s staff are sought by thousands of people each year.
Construction
General Construction Techniques
- Heavy Timber Construction
- Tongue-&-Groove Roof Decking
- Framing Basics
- Prescriptive Residential Wood Deck Guide
- Bark Siding Installation Guide
Lumber Data & Specifications
Connection Guides
Engineering
- Design Values for Joists and Rafters
- Span Tables for Joists and Rafters
- Lumber Design Values and Framing Spans
- National Design Specification (NDS) 2018 Supplement
- Beam Design Formulas with Shear and Moment Diagrams
- Interior Shear Walls
- Design Load Tables for Solid-Sawn Lumber Beams and Headers
- Design Load Tables for Wood Columns (Posts)
- Design Load Tables for Wood Studwalls Subjected to Wind Pressure
- Manual for Engineered Wood Construction
- Size-Adjusted Design Values for Western Lumber
Properties
- Common Lumber Defects
- WWPA Grade Stamps
- Natural Wood Siding
- Paneling Basics
- Specifying Western Lumber
- Standard Patterns
- Lumber Storage
- Structural Glued Lumber
Performance
- Inscribed vs. Separate Structures in the WFCM
- Calculating the Fire Resistance of Wood Members and Assemblies
- Component Additive Method (CAM) for Calculating and Demonstrating Assembly Fire Resistance
- Fire-Resistance-Rated Wood-Frame Wall and Floor/Ceiling Assemblies
- Flame Spread Performance of Wood Products Used for Interior Finish
- Meeting Residential Energy Requirements with Wood-Frame Construction
- Post Frame Buildings
- Design of Wood Frame Structures for Permanence
- Details for Conventional Wood Frame Construction
- Fire Design Specification for Wood Construction
- Plank-and-Beam Framing for Residential Buildings
- Preventing & Controlling Mold
- Cleaning Mold on Wood
- Mold, Housing & Wood
Douglas Fir
- Douglas Fir Properties
- Douglas Fir Technical Specifications
- Douglas Fir – Coast Forest
- Douglas Fir (SEC)
- Performances of Douglas Fir in Real Outdoor Use Conditions
Western Red Cedar
- Western Red Cedar Properties
- Western Red Cedar Technical Specifications
- Western Red Cedar Designer Handbook
- Western Red Cedar – A Giant Among Giants
- How to Specify Western Red Cedar
- Western Red Cedar – An American Wood
- Growth, Properties & Uses of Western Red Cedar
- Western Red Cedar Quick Facts
- Western Red Cedar (Tropix 7)
Eastern White Pine
- Eastern White Pine Properties
- Eastern White Pine Technical Specifications
- Eastern White Pine from the USA
- Anatomical and Chemical Responses of Eastern White Pine to Blue-Stain Inoculation
- Identification and Evaluation of Defects in Eastern White Pine
- Eastern White Pine (USFS)
Specialty Timbers
Design Load Tables for Wood Columns (Posts)
Design loads of axial compression for simple wood columns subjected to concentric compression loads of commonly-used lumber products; loads for 4x4 and 4x6 lumber for the
commonly used grades; incised lumber; and design loads for 6x, 8x, 10x and 12x timbers.
Published by the WWPA. (7 pages)
Note: a signup/account (free and fast process) is required to download and view WWPA documents.
Supported by Western lumber manufacturers, WWPA delivers lumber grading, quality control, technical, business information and product support services to sawmills as well as those who use Western softwood lumber products throughout the world.
Western Wood Products Association represents lumber manufacturers in the 12 Western states and Alaska. The largest lumber association in the region, WWPA provides service covering over 8 billion board feet of annual Western lumber production.
Services
WWPA provides services to Western mills in three areas: Quality Assurance, Technical Services and Market Services. Member mills have access and can guide Association activities in all three service areas. WWPA also provides nonmember quality assurance services, including grade inspection, heat-treating, remanufactured wood, and glued products.
Membership
WWPA mills produce more than 60% of the lumber manufactured in the West each year. The Member roster features the top independent lumber companies in North America, with mills that lead the industry in manufacturing technology, operating efficiencies and sales strategies.
Staffing
WWPA’s headquarters are located in Lake Oswego, OR. The Association’s field staff are recognized throughout the sawmilling industry, with each averaging more than two decades of lumber quality control experience. WWPA technical and product support professionals are the acknowledged experts in the use of Western lumber in construction. The statistical and product information created by the Association’s staff are sought by thousands of people each year.
Construction
General Construction Techniques
- Heavy Timber Construction
- Tongue-&-Groove Roof Decking
- Framing Basics
- Prescriptive Residential Wood Deck Guide
- Bark Siding Installation Guide
Lumber Data & Specifications
Connection Guides
Engineering
- Design Values for Joists and Rafters
- Span Tables for Joists and Rafters
- Lumber Design Values and Framing Spans
- National Design Specification (NDS) 2018 Supplement
- Beam Design Formulas with Shear and Moment Diagrams
- Interior Shear Walls
- Design Load Tables for Solid-Sawn Lumber Beams and Headers
- Design Load Tables for Wood Columns (Posts)
- Design Load Tables for Wood Studwalls Subjected to Wind Pressure
- Manual for Engineered Wood Construction
- Size-Adjusted Design Values for Western Lumber
Properties
- Common Lumber Defects
- WWPA Grade Stamps
- Natural Wood Siding
- Paneling Basics
- Specifying Western Lumber
- Standard Patterns
- Lumber Storage
- Structural Glued Lumber
Performance
- Inscribed vs. Separate Structures in the WFCM
- Calculating the Fire Resistance of Wood Members and Assemblies
- Component Additive Method (CAM) for Calculating and Demonstrating Assembly Fire Resistance
- Fire-Resistance-Rated Wood-Frame Wall and Floor/Ceiling Assemblies
- Flame Spread Performance of Wood Products Used for Interior Finish
- Meeting Residential Energy Requirements with Wood-Frame Construction
- Post Frame Buildings
- Design of Wood Frame Structures for Permanence
- Details for Conventional Wood Frame Construction
- Fire Design Specification for Wood Construction
- Plank-and-Beam Framing for Residential Buildings
- Preventing & Controlling Mold
- Cleaning Mold on Wood
- Mold, Housing & Wood
Douglas Fir
- Douglas Fir Properties
- Douglas Fir Technical Specifications
- Douglas Fir – Coast Forest
- Douglas Fir (SEC)
- Performances of Douglas Fir in Real Outdoor Use Conditions
Western Red Cedar
- Western Red Cedar Properties
- Western Red Cedar Technical Specifications
- Western Red Cedar Designer Handbook
- Western Red Cedar – A Giant Among Giants
- How to Specify Western Red Cedar
- Western Red Cedar – An American Wood
- Growth, Properties & Uses of Western Red Cedar
- Western Red Cedar Quick Facts
- Western Red Cedar (Tropix 7)
Eastern White Pine
- Eastern White Pine Properties
- Eastern White Pine Technical Specifications
- Eastern White Pine from the USA
- Anatomical and Chemical Responses of Eastern White Pine to Blue-Stain Inoculation
- Identification and Evaluation of Defects in Eastern White Pine
- Eastern White Pine (USFS)
Specialty Timbers
Design Load Tables for Wood Studwalls Subjected to Wind Pressure
A set of design load tables for Douglas Fir-Larch and Hem-Fir, according to the 1991 NDS for wood construction.
Published by the WWPA. (6 pages)
Note: a signup/account (free and fast process) is required to download and view WWPA documents.
Supported by Western lumber manufacturers, WWPA delivers lumber grading, quality control, technical, business information and product support services to sawmills as well as those who use Western softwood lumber products throughout the world.
Western Wood Products Association represents lumber manufacturers in the 12 Western states and Alaska. The largest lumber association in the region, WWPA provides service covering over 8 billion board feet of annual Western lumber production.
Services
WWPA provides services to Western mills in three areas: Quality Assurance, Technical Services and Market Services. Member mills have access and can guide Association activities in all three service areas. WWPA also provides nonmember quality assurance services, including grade inspection, heat-treating, remanufactured wood, and glued products.
Membership
WWPA mills produce more than 60% of the lumber manufactured in the West each year. The Member roster features the top independent lumber companies in North America, with mills that lead the industry in manufacturing technology, operating efficiencies and sales strategies.
Staffing
WWPA’s headquarters are located in Lake Oswego, OR. The Association’s field staff are recognized throughout the sawmilling industry, with each averaging more than two decades of lumber quality control experience. WWPA technical and product support professionals are the acknowledged experts in the use of Western lumber in construction. The statistical and product information created by the Association’s staff are sought by thousands of people each year.
Construction
General Construction Techniques
- Heavy Timber Construction
- Tongue-&-Groove Roof Decking
- Framing Basics
- Prescriptive Residential Wood Deck Guide
- Bark Siding Installation Guide
Lumber Data & Specifications
Connection Guides
Engineering
- Design Values for Joists and Rafters
- Span Tables for Joists and Rafters
- Lumber Design Values and Framing Spans
- National Design Specification (NDS) 2018 Supplement
- Beam Design Formulas with Shear and Moment Diagrams
- Interior Shear Walls
- Design Load Tables for Solid-Sawn Lumber Beams and Headers
- Design Load Tables for Wood Columns (Posts)
- Design Load Tables for Wood Studwalls Subjected to Wind Pressure
- Manual for Engineered Wood Construction
- Size-Adjusted Design Values for Western Lumber
Properties
- Common Lumber Defects
- WWPA Grade Stamps
- Natural Wood Siding
- Paneling Basics
- Specifying Western Lumber
- Standard Patterns
- Lumber Storage
- Structural Glued Lumber
Performance
- Inscribed vs. Separate Structures in the WFCM
- Calculating the Fire Resistance of Wood Members and Assemblies
- Component Additive Method (CAM) for Calculating and Demonstrating Assembly Fire Resistance
- Fire-Resistance-Rated Wood-Frame Wall and Floor/Ceiling Assemblies
- Flame Spread Performance of Wood Products Used for Interior Finish
- Meeting Residential Energy Requirements with Wood-Frame Construction
- Post Frame Buildings
- Design of Wood Frame Structures for Permanence
- Details for Conventional Wood Frame Construction
- Fire Design Specification for Wood Construction
- Plank-and-Beam Framing for Residential Buildings
- Preventing & Controlling Mold
- Cleaning Mold on Wood
- Mold, Housing & Wood
Douglas Fir
- Douglas Fir Properties
- Douglas Fir Technical Specifications
- Douglas Fir – Coast Forest
- Douglas Fir (SEC)
- Performances of Douglas Fir in Real Outdoor Use Conditions
Western Red Cedar
- Western Red Cedar Properties
- Western Red Cedar Technical Specifications
- Western Red Cedar Designer Handbook
- Western Red Cedar – A Giant Among Giants
- How to Specify Western Red Cedar
- Western Red Cedar – An American Wood
- Growth, Properties & Uses of Western Red Cedar
- Western Red Cedar Quick Facts
- Western Red Cedar (Tropix 7)
Eastern White Pine
- Eastern White Pine Properties
- Eastern White Pine Technical Specifications
- Eastern White Pine from the USA
- Anatomical and Chemical Responses of Eastern White Pine to Blue-Stain Inoculation
- Identification and Evaluation of Defects in Eastern White Pine
- Eastern White Pine (USFS)
Specialty Timbers
Manual for Engineered Wood Construction
Guidance for design of most wood-based structural products used in the construction of wood buildings.
Published by the AWC. (112 pages).
The American Wood Council (AWC) is a non-profit organization that provides information and resources for the design and construction of wood-framed buildings. It was formed with the mission to increase the use of wood in construction through the development of design tools and building codes, standards, and guidelines. They represent the North American softwood lumber industry and provide technical resources, including design software, engineering guides, and standards for architects, engineers, builders, and other construction professionals.
The AWC is a membership organization that is made up of companies and organizations involved in the production and distribution of wood products, as well as companies that provide services to the wood products industry, such as engineering firms and lumberyards. They were established in the 1940s, as a way to provide technical support to the wood products industry and promote the use of wood as a construction material. The organization also advocates for the use of wood in construction at the national and international levels, and works with code-making and standard-setting bodies to ensure that building codes and standards are favorable to the use of wood.
Construction
General Construction Techniques
- Heavy Timber Construction
- Tongue-&-Groove Roof Decking
- Framing Basics
- Prescriptive Residential Wood Deck Guide
- Bark Siding Installation Guide
Lumber Data & Specifications
Connection Guides
Engineering
- Design Values for Joists and Rafters
- Span Tables for Joists and Rafters
- Lumber Design Values and Framing Spans
- National Design Specification (NDS) 2018 Supplement
- Beam Design Formulas with Shear and Moment Diagrams
- Interior Shear Walls
- Design Load Tables for Solid-Sawn Lumber Beams and Headers
- Design Load Tables for Wood Columns (Posts)
- Design Load Tables for Wood Studwalls Subjected to Wind Pressure
- Manual for Engineered Wood Construction
- Size-Adjusted Design Values for Western Lumber
Properties
- Common Lumber Defects
- WWPA Grade Stamps
- Natural Wood Siding
- Paneling Basics
- Specifying Western Lumber
- Standard Patterns
- Lumber Storage
- Structural Glued Lumber
Performance
- Inscribed vs. Separate Structures in the WFCM
- Calculating the Fire Resistance of Wood Members and Assemblies
- Component Additive Method (CAM) for Calculating and Demonstrating Assembly Fire Resistance
- Fire-Resistance-Rated Wood-Frame Wall and Floor/Ceiling Assemblies
- Flame Spread Performance of Wood Products Used for Interior Finish
- Meeting Residential Energy Requirements with Wood-Frame Construction
- Post Frame Buildings
- Design of Wood Frame Structures for Permanence
- Details for Conventional Wood Frame Construction
- Fire Design Specification for Wood Construction
- Plank-and-Beam Framing for Residential Buildings
- Preventing & Controlling Mold
- Cleaning Mold on Wood
- Mold, Housing & Wood
Douglas Fir
- Douglas Fir Properties
- Douglas Fir Technical Specifications
- Douglas Fir – Coast Forest
- Douglas Fir (SEC)
- Performances of Douglas Fir in Real Outdoor Use Conditions
Western Red Cedar
- Western Red Cedar Properties
- Western Red Cedar Technical Specifications
- Western Red Cedar Designer Handbook
- Western Red Cedar – A Giant Among Giants
- How to Specify Western Red Cedar
- Western Red Cedar – An American Wood
- Growth, Properties & Uses of Western Red Cedar
- Western Red Cedar Quick Facts
- Western Red Cedar (Tropix 7)
Eastern White Pine
- Eastern White Pine Properties
- Eastern White Pine Technical Specifications
- Eastern White Pine from the USA
- Anatomical and Chemical Responses of Eastern White Pine to Blue-Stain Inoculation
- Identification and Evaluation of Defects in Eastern White Pine
- Eastern White Pine (USFS)
Specialty Timbers
Size-Adjusted Design Values for Western Lumber
A set of tables with Base Values for Dimension Lumber (2" to 4" thick), adjusted for the appropriate size factors. Intended for those who are more comfortable selecting a size-adjusted number from a table rather than using a Base Value along with a Size Adjustment.
Note: a signup/account (free and fast process) is required to download and view WWPA documents.
Supported by Western lumber manufacturers, WWPA delivers lumber grading, quality control, technical, business information and product support services to sawmills as well as those who use Western softwood lumber products throughout the world.
Western Wood Products Association represents lumber manufacturers in the 12 Western states and Alaska. The largest lumber association in the region, WWPA provides service covering over 8 billion board feet of annual Western lumber production.
Services
WWPA provides services to Western mills in three areas: Quality Assurance, Technical Services and Market Services. Member mills have access and can guide Association activities in all three service areas. WWPA also provides nonmember quality assurance services, including grade inspection, heat-treating, remanufactured wood, and glued products.
Membership
WWPA mills produce more than 60% of the lumber manufactured in the West each year. The Member roster features the top independent lumber companies in North America, with mills that lead the industry in manufacturing technology, operating efficiencies and sales strategies.
Staffing
WWPA’s headquarters are located in Lake Oswego, OR. The Association’s field staff are recognized throughout the sawmilling industry, with each averaging more than two decades of lumber quality control experience. WWPA technical and product support professionals are the acknowledged experts in the use of Western lumber in construction. The statistical and product information created by the Association’s staff are sought by thousands of people each year.
Construction
General Construction Techniques
- Heavy Timber Construction
- Tongue-&-Groove Roof Decking
- Framing Basics
- Prescriptive Residential Wood Deck Guide
- Bark Siding Installation Guide
Lumber Data & Specifications
Connection Guides
Engineering
- Design Values for Joists and Rafters
- Span Tables for Joists and Rafters
- Lumber Design Values and Framing Spans
- National Design Specification (NDS) 2018 Supplement
- Beam Design Formulas with Shear and Moment Diagrams
- Interior Shear Walls
- Design Load Tables for Solid-Sawn Lumber Beams and Headers
- Design Load Tables for Wood Columns (Posts)
- Design Load Tables for Wood Studwalls Subjected to Wind Pressure
- Manual for Engineered Wood Construction
- Size-Adjusted Design Values for Western Lumber
Properties
- Common Lumber Defects
- WWPA Grade Stamps
- Natural Wood Siding
- Paneling Basics
- Specifying Western Lumber
- Standard Patterns
- Lumber Storage
- Structural Glued Lumber
Performance
- Inscribed vs. Separate Structures in the WFCM
- Calculating the Fire Resistance of Wood Members and Assemblies
- Component Additive Method (CAM) for Calculating and Demonstrating Assembly Fire Resistance
- Fire-Resistance-Rated Wood-Frame Wall and Floor/Ceiling Assemblies
- Flame Spread Performance of Wood Products Used for Interior Finish
- Meeting Residential Energy Requirements with Wood-Frame Construction
- Post Frame Buildings
- Design of Wood Frame Structures for Permanence
- Details for Conventional Wood Frame Construction
- Fire Design Specification for Wood Construction
- Plank-and-Beam Framing for Residential Buildings
- Preventing & Controlling Mold
- Cleaning Mold on Wood
- Mold, Housing & Wood
Douglas Fir
- Douglas Fir Properties
- Douglas Fir Technical Specifications
- Douglas Fir – Coast Forest
- Douglas Fir (SEC)
- Performances of Douglas Fir in Real Outdoor Use Conditions
Western Red Cedar
- Western Red Cedar Properties
- Western Red Cedar Technical Specifications
- Western Red Cedar Designer Handbook
- Western Red Cedar – A Giant Among Giants
- How to Specify Western Red Cedar
- Western Red Cedar – An American Wood
- Growth, Properties & Uses of Western Red Cedar
- Western Red Cedar Quick Facts
- Western Red Cedar (Tropix 7)
Eastern White Pine
- Eastern White Pine Properties
- Eastern White Pine Technical Specifications
- Eastern White Pine from the USA
- Anatomical and Chemical Responses of Eastern White Pine to Blue-Stain Inoculation
- Identification and Evaluation of Defects in Eastern White Pine
- Eastern White Pine (USFS)