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Wood Utilization—Wood Industry in North America

Wood Utilization—Wood Industry in North America. How much wood is used in building a house?. For a 2000 ft 2 wood-framed house 16,2000 board ft. (1 bf = 1’ x 1’ x 1”) Lumber or 1,350 ft 3 or 20.5 m 3 or 20 pine trees (30” DBH)

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Wood Utilization—Wood Industry in North America

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  1. Wood Utilization—Wood Industry in North America

  2. How much wood is used in building a house? For a 2000 ft2 wood-framed house • 16,2000 board ft. (1 bf = 1’ x 1’ x 1”) Lumber or 1,350 ft3 or 20.5 m3 or 20 pine trees (30” DBH) • Plus 9,500 ft2 (based on 0.5” thick) Structural Panels or 400 ft3 or 300 4’ x 8’ x 0.5” sheets of Plywood, OSB, or Hardboard for sheathing, decking & siding • Wood for decks and non-structural panels are extra

  3. Lumber • Solid lumber is good but subjects to availability and variability in physical properties • Can be substitutes by engineered wood products, such as Parallel Strand L, I-joist, Laminated Veneer L and Laminated Strand L Plus Glue-laminated Timber Glulam PSL I-Joist LVL LSL

  4. Advantages of Engineered Products • Value-added and conservative These products made from materials of lower grades and processing residues • Predictable physical properties and performances

  5. Disadvantages • Wood is good but needs to be protected from many enemies Fires destroy houses And billions of dollars Property lose annually Along with 12,200 fatalities

  6. Enemies of Wood • Termites also destroy houses Annual property lose: 250 M$ Costs 125 M$/yr in Corrective measures.

  7. Wood Decays Millions are spent annually to repair houses due to decay My Pella window decayed Bath room leakage causes decay A brown-rot fungus is eating up the wood Only because of inproper installation!

  8. The wood industry is proud to be environmentally friendly • A survey was conducted in 1996 by the Forest Products Laboratory to identify Top Ten Most Significant Forest Products Technologies

  9. Here They Are #1 Development of wood preservative treatments to extend the service life of wood --How many trees saved? #2 Oriented Strand Board manufacturing --Use low-value species and milling residues

  10. #3Manufacturing paper from hardwood and wood wastes --Again, saving more valuable softwoods #4 Technology for plywood production from Southern pine --Saved many big Douglas fir and larch trees

  11. #5 Methods to utilize alternative/low-value species #6 Methods of processing small logs --Computer technologies make it possible #7 Development of composite products from waste or low-value woods/fibers including hardboard, particleboard, medium density fiberboard, wood/plastic composites

  12. #8 Development of recycling technologies for paper, wastewood and agricultural fibers #9 Development of non-toxic wood preservatives #10 Technology transfer to the forest products industry

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