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Timber Sites

Engineered Wood Association (APA)
Western Wood Products Association (WWPA)
Southern Pine Council's Home Page
Southern Forest Products Association
American Wood Preservers Association
Forest Products Laboratory Home Page
National Wood Flooring Association
American Institute of Timber Construction (AITC)
American Forest & Paper Association (AF&PA)

American Plywood Association
Boise Cascade
Weyerhaeuser Company
Trus Joist
North American Plywood
Louisiana Pacific
Osmose Wood Preserving
Great Southern Wood Preserving
Architectural Woodwork Institute

American Forest & Paper Association
American Wood Council
American Institute of Timber Construction (AITC)
APA - The Engineered Wood Association
California Redwood Association
Canadian Wood Council
Cedar Shake & Shingle Bureau
Composite Panel Association
Council of Forest Industries (COFI)
Directory of Forest Products, Wood Science, & 
Forest Products Society (FPS)
Hardwood Plywood & Veneer Association

MSR Lumber Producers Council
Maple Flooring Manufactures Association
National Hardwood Lumber Association
National Oak Flooring Manufacturers Association
National Sash & Door Jobbers Association
National Wood Flooring Association
North American Wholesale Lumbermans Association
Southern Cypress Manufacturers Association
Southern Forest Products Association (SFPA)
Southern Pine Inspection Bureau
Structural Board Association (SBA)
The National Wood Window & Door Association
Vermont Wood Manufacturers Association
Western Red Cedar Lumber Association (WRCLA)
Wood Moulding & Millwork Producers Association
Wood Truss Council of America (WTCA)
Woodwork Institute of California
Staircase & Millwork Corporation
Stair World
Mylen Stairs, Inc.
The Iron Shop
Spiral Stairs of America
Kroy Building Products
American Hardboard Association
Chadsworth's Columns
Melton Classics
Royal Corinthian
Spiral Stairs of America
Summit Door
Mold and Wood Products
Louisiana Pacific - SmartSide Siding
Georgia Pacific - Catawba Siding

Natural Select Wood
Forest Products Laboratory (FPL)
Real Cedar Association
Temple Inland
Treated Wood
Hardwood Plywood & Veneer Association
Span Calculator from Canadian Wood Council
Span Calculator from American Wood Council
Southern Pine Span Tables
Washington State Timber Engineering
Random Lengths
APA CAD Construction Details
Wood Connection Calculator
Wood Span Calculator
Stringfellow Lumber Company
Case Engineered Lumber
LSU Ag Center for Termites
USP Structural Connectors
Engineered Wood Products Association
Build America Program
Wall Bracing (APA)
Windstorm OSB
Wood I-Joist Manufacturers Association (WIJMA)
Open Joist
Performance Panels
APA CAD Details
Ridgeway Structural Systems
North American Deck and Railing Association (NADRA)
Wood Plastic Composite Information Center
Shake and Shingle Association
Building Materials and Wood Technology
Fire Resources for Wood Construction
Wood Home Projects
Typical Deck Details
TimberWork Connectors
Engineered Wood Products Association (EWPA)
Ridgway Structural Systems, Inc.
Timber Framer's Guild (TFG)
Forest Products Laboratory (FPL)
James & Company Reclaimed Timbers
The Roof Framing Calculator
APA - Build a Better Home
Huber Engineered Wood Products
Advantage Trim & Lumber - Exotic Woods
Forest Products Laboratory Documents
iLevel by Weyerhaeuser
Nichiha Fiber Cement Building Products
Timber Framers Guild (TFG)
Forest Products Laboratory
Raised Floor Living
Structural Building Components Association (SBCA)
Zip System Roof and Wall Sheathing
GRK Fasteners
Phoenix Metal Products - Framing Connectors
Universal Forest Products
Lumber and Building Materials Journal