Slide 1 Lumber Standards and Specifications Frank Stewart Western Wood Products Association Slide 2 The Wood Products Council is a Registered Provider with The American Institute of Architects Continuing Education Systems (AIA/CES). Credit(s) earned on completion of this program will be reported to AIA/CES for AIA members. Certificates of Completion for both AIA members and non-aia members are available upon request. This program is registered with AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation. Slide 3 Learning Objectives At the end of this program, participants will be able to: 1. Correctly reference lumber standards 2. Select the appropriate species & grades 3. Develop rough carpentry specifications 4. Develop finish carpentry specifications
Slide 4 WWPA Functions Quality Standards/Manufacturing Services Technical Services/Market Services Slide 5 Slide 6
Slide 7 19.3 Billion Bd./Ft. (2004) vs. 10.39 Billion Bd./Ft/ (2009) Slide 8 Slide 9 Species Groups West Douglas Fir-Larch Hem-Fir (White Fir) Spruce-Pine-Fir (South) Western Cedars White Woods South Southern Pine Northeast Spruce-Pine-Fir (South) Canada Spruce-Pine-Fir
Slide 10 Slide 11 Slide 12 2303.1.1 Lumber. Lumber used for load-supporting purposes,... approved by an accreditation body that complies with DOC PS 20 or equivalent. IRC R502.1
Slide 13 National Grading Rule Committee American Lumber Standard Committee, Inc. ALSC Board of Review Rules writing agencies Inspection agencies Slide 14 Slide 15
Slide 16 Lumber Size Categories Nominal Sizes Timbers 5 x5 & larger Boards 1 thick & thicker 2 wide & wider Dimension 2 to 4 thick 2 wide & wider Slide 17 Slide 18
Slide 19 Slide 20 Moisture Content Standards Slide 21
Slide 22 Dry Green Weight relationship Slide 23 Moisture Content Designations S-GRN Greater than 19% MC S-DRY 19% or less KD Kiln dry 19% or less KD HT Kiln dry 19% or less and heat treated (56ºC core temperature 30 min.) MC 15 15% or less KD 15 Kiln dry 15% or less Slide 24
Slide 25 Green vs. dry sizes 1 1 2 1 9 16 1 5 2 5 5 8 Dry Green Slide 26 Slide 27
Slide 28 Slide 29 2304.3.3. Shrinkage. Wood walls and bearing partitions shall not support more than two floors and a roof unless an analysis satisfactory to the building official shows that shrinkage of the wood framing will not have adverse effects on the structure or any plumbing, electrical or mechanical systems, or other equipment installed therein Slide 30
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Slide 34 Slide 35 Identification Slide 36
Slide 37 Slide 38 Slide 39 2303.1.1 Lumber. Lumber used for load-supporting purposes, including end-jointed or edge-glued lumber, machine stress-rated or machine evaluated lumber, shall be identified by the grade mark of a lumber grading or inspection agency that has been approved by an accreditation body that complies with DOC PS 20 or equivalent. IRC R502.1
Slide 40 Rough Carpentry Specifications Slide 41 Dimension Products Slide 42
Slide 43 Use Categories Structural Light Framing Light Framing Studs Structural Joists and Planks Timbers Slide 44 Lumber Design Values ASTM D 1990 Dimension Lumber ASTM D 2555 ASTM D 245 Slide 45
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Slide 58 Slide 59 Finish Carpentry Specifications Slide 60 Non-Structural Lumber
Slide 61 Slide 62 Slide 63 Appearance Grades Selects Finish Commons Special Siding/Paneling Special Western Red Cedar
Slide 64 Slide 65 Slide 66 Uppers (MC 15%) Selects Special WRC Finish Clear Heart B&Btr A C Superior D B Prime E
Slide 67 Slide 68 Knotty (S-GRN/S-DRY) Common Knotty Cedar Alternate 2&Btr Select Knotty Select Merch 3 Quality Knotty Construction 4 Standard Utility 5 Economy Slide 69
Slide 70 Questions? Slide 71 www.wwpa.org