then - university of british columbia

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Then

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Now

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Wood Products Taxonomy

Engineered Wood

Products

I-Beams

Roof trusses

WOOD

Composites Solid Wood

Panels

Engineered Lumber

Composites (ELC)

Wood/ Non-wood

Wood Based

Wood/ Cement Particleboard

MDF

Plywood

OSB

LVL

OSL

Softwood Lumber

Glued

Treated

Hardwood

Lumber

Boards

Dimension

Timber

MSR

Finger joined

Edge glued

Glulam

CCA treated

Fire retardant

Hardwood

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1890 1900 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000

CCA-treated Lumber

Light Frame Trusses Lumber

Panels

Plywood Particleboard Waferboard

Medium Density Fiberboard

Oriented Strand Board

MSR Lumber

Wood I-Beam

Laminated Veneer Lumber

Glue Laminated Lumber

Parallel Strand Lumber

Laminated Strand Lumber

Commercial introduction for major wood products

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Solid Wood - Boards

Boards

Dimension Lumber

Timber

Machine Stress Rated

Softwood Lumber

1” thick material finished, non-structural markets are: export, industrial, home center N.A. production likely to increase

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Boards

BC Wood Specialties

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Solid Wood - Dimension Lumber

2x4, 2x6, 2x8 construction lumber majority of lumber produced in North America N.A. production has grown 1.4% p.a. over last 20 years bulk commodity product with little specialization

Boards

Dimension Lumber

Timber


Softwood Lumber

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Dimension Lumber

Canadian Wood Council

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Solid Wood - Timber

minimum dimensions 5.5” mainly for export market production is decreasing high-end product

Boards

Dimension Lumber

Timber


Softwood Lumber

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Timber


www.homesfromthegroundup.com

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Solid Wood - Machine Stress Rated

mechanically graded lumber structural end-uses value-added lumber product use is increasing in traditional and new markets

1950f - 1.7E

Boards

Dimension Lumber

Timber


Softwood Lumber

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Machine Stress Rated Lumber

BC Wood Specialties

Alberta Forest Products Association

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Solid Wood - Finger joined

Finger joined

Edge-glued

Glulam

Glued

longer lengths produced from shorter stock allow defects to be reduced structural or non-structural utilized in lumber, glulam, I-beams markets are increasing

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Finger Joined Lumber

BC Wood Specialties www.stegbar.com

www.thegluedepot.com

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Solid Wood - Edge-glued panels

Finger joined

Edge-glued

Glulam

Glued

edge-lamination of wood wider widths from narrow material stable-panel produced industrial and finished retail products

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Edge Glued Panels

BC Wood Specialties

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Solid Wood - Glulam

Finger joined

Edge-glued

Glulam

Glued

“glue-laminated” lumber uses high quality, stress-rated “lamstock” used as beams and columns structural, architectural uses

Individuallaminations

Finger joint

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Glue Laminated Beams

Canadian Wood Council Ellis

Trus Joist

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Solid Wood - Hardwood Lumber

Hardwood

HardwoodLumber

used for architectural rather than structural products main NA supply from eastern NA

grading system based on cutting high quality boards from rough lumber used for flooring, trim & molding, joinery, cabinets

20 www.alibaba.com

Solid Wood - Hardwood Lumber

www.itlcorp.com

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Particleboard

non-structural panel product uses waste particles from other processes surface is smooth but edges are not used mostly for industrial purposes

Particleboard

MDF

Plywood

OSB

Wood-based

Panels

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Particleboard mat formation

Revolving former heads Wind forming

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Medium Density Fiberboard

non-structural panel product uses mechanically produced wood fibres superior machinability to particleboard markets are growing rapidly

Particleboard

MDF

Plywood

OSB

Wood-based

Panels

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Disc refiner detail

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Plywood

structural panel product uses high quality softwood veneers manufactured in 4x8ft sheets market is steady or declining

FaceCore

Crossband

Grain direction

Particleboard

MDF

Plywood

OSB

Wood-based

Panels

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Veneer Peeling

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Plywood


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Oriented Strandboard

uses flakes or strands (approx. 20x100x1mm) aspen, poplar, pine, mixed hardwoods used produced as large panels (up to 12x24ft) structural panel as replacement for softwood plywood market is growing rapidly

Particleboard

MDF

Plywood

OSB

Wood-based

Panels

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Waferboard vs. OSB

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Oriented Strandboard

Canadian Wood Council Structural Board Association

Variation in wood products

frequency

strength

Solid wood lower 5th percentile

mean

÷ safety factors

allowable design stress


frequency

strength

Solid wood lower 5th percentile

mean

÷ safety factors



lower 5th percentile

÷ safety factors

Wood composite A

mean


frequency

strength

Solid wood


mean

÷ safety factors




÷ safety factors

mean

Wood composite B

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Laminated Veneer Lumber (LVL)

Laminated VeneerLumber (LVL)

Oriented StrandLumber (OSL)

EngineeredLumber Composites

veneers glued with grain running parallel to each other veneers graded prior to assembly used on flat or on edge used as I-beam flanges, beams and joists

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Laminated Veneer Lumber

Trus Joist

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Oriented Strand Lumber (OSL)

uses long strands of wood wide variety of dimensions possible Parallam, 2.3mx1cm veneers, high-end structural uses TimberStrand, 30cmx2cm flakes, window frames, door stock, wall studs

Laminated VeneerLumber (LVL)

Oriented StrandLumber (OSL)

EngineeredLumber Composites

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Parallel Strand Lumber (Parallam)

Trus Joist

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I-Beams

I-Beams

Roof trusses

EngineeredWood Products

flanges - lumber, MSR lumber, LVL, OSL webs - plywood, OSB replace wide, solid pieces of wood used as floor joists, roof rafters

flange

web

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I - Beams

Trus Joist

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Roof Trusses

small dimension, short lengths of wood combined to produce large-sized, long length support members held together with truss plates often custom-designed using MSR lumber pitch-chord or parallel-chord

Top chord Web

Truss plateBottom chord

I-Beams

Roof trusses

EngineeredWood Products

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Trusses


then - university of british columbia

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