1. Engineered Building Products
Dilpreet Bajwa
Chad Ulven
James Helphrey

2. What are Engineered Building Products ?
Engineered wood products can be defined as products consisting of a combination of a smaller components to make a structural product designed using engineering methods. An alternative to traditional sawn lumber.

3. Why use Engineered Building Products ?
Variety of Wood Sources
Performance Standard
Uniform Properties
Efficient use of Resources
Economics

4. Type of Engineered Materials
Veneer Based
Plywood
Laminated Veneer Lumber
Parallel Strand Lumber

5. Laminates Glue Laminated Timber Overlayed Materials
Laminated Wood-nonwood Composites

6. Laminate Manufacturing

7. Composite Materials Fiberboard (low, medium and high density)
Hardboard
Particle Board
Waferboard
Flake Board
Oriented standboard (OSB)
Laminate strand lumber
I-Joists

8. Various Composite Materials

9. Wood-NonWood Composites
Wood Fiber-polymer Composites
Inorganic-bonded Composites
Wood fiber-agricultural Fiber Composites

10. Grade Stamps for Plywood and OSB
Courtesy of TECO and APA

11. Adhesives for Bonding Curing Types
Phenol - Formaldehyde – Construction Plywood and OSB
Urea - Formaldehyde – Particle Board, MDF
Melamine - Formaldehyde – Decorative Laminates, Paper Coatings
Isocyanates – Composites from Strands
Bio-Based – Proteins, Glues

12. Important Physical and Mechanical Properties
Density
Moisture Content
Moisture Absorption and Swelling
Linear Expansion
Flexure
Modulus of Elasticity
Modulus of Rupture
Tensile Strength
Compressive Strength
Internal Bond
Fastener Holding Capacity

13. Treated Wood Preservatives Fungal Resistance Termite Resistance
Reduced Water Absorption

14. Activity 1 – Analyzing Moisture Content
Objective – To study the moisture characteristics of different engineered materials
Materials – Six different engineered wood composite materials
Method – ASTM D 1037 (2 hour Soak)
Calculate (%) – Water Absorption (WA), Thickness Swelling (TS), Volumetric Change (VC)
Formula - % WA = (Soak wt. – Original wt.) / Original wt.*100
Materials 1 2 3 4 5 6
WA (%)
TS (%)
VC (%)

15. Activity 2 – Designing 3-ply Plywood and Testing its Strength
Objective – To study the effect of grain orientation on strength of 3-ply plywood
Materials – Veneer, Glue, Lamination Jig, and Flexural Tester
Method – ASTM D 1037, PS 1-07
Plot load versus deflection
Calculate Modulus of Elasticity (E), Flexural Strength (FS)
Materials
3 ply-Parallel
3 ply-Perpendicular
Loads (gram)
Deflection (mm)
Grain Direction - Par - Parallel Pen - Perpendicular

16. Plywood Manufacturing Process

17. Video of plywood production process http://www. youtube. com/watch
Questions ??