Podcast
Questions and Answers
What is another name for fiber cement board?
What is another name for fiber cement board?
Which material is composed of 72% Portland cement and 20% mineralized cellulose fibers?
Which material is composed of 72% Portland cement and 20% mineralized cellulose fibers?
What is the major reason for glue-laminating wood?
What is the major reason for glue-laminating wood?
In glue-laminated wood, what is done to lower the moisture content before lamination?
In glue-laminated wood, what is done to lower the moisture content before lamination?
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What is the abbreviation for Cross-laminated timber?
What is the abbreviation for Cross-laminated timber?
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How are the end joints typically joined in engineered wood lumber?
How are the end joints typically joined in engineered wood lumber?
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What is the common thickness range for engineered wood lumber?
What is the common thickness range for engineered wood lumber?
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What is the main advantage of hardboard over solid wood?
What is the main advantage of hardboard over solid wood?
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Which engineered wood product is made from shredded wood strands and pressed into a rectangular cross-section?
Which engineered wood product is made from shredded wood strands and pressed into a rectangular cross-section?
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How is chipboard typically constructed?
How is chipboard typically constructed?
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Among engineered wood types, which one is identified as the least strong and least expensive composite lumber product?
Among engineered wood types, which one is identified as the least strong and least expensive composite lumber product?
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Which of the following engineered wood types is known for its approximate equalization of strength properties along its length and width?
Which of the following engineered wood types is known for its approximate equalization of strength properties along its length and width?
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What distinguishes laminated strand lumber (LSL) from oriented strand lumber (OSL)?
What distinguishes laminated strand lumber (LSL) from oriented strand lumber (OSL)?
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What is a common characteristic of medium density fiberboard (MDF)?
What is a common characteristic of medium density fiberboard (MDF)?
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Which engineered wood product is made from thin wood veneer sheets glued and laminated into thicker members?
Which engineered wood product is made from thin wood veneer sheets glued and laminated into thicker members?
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Which type of engineered wood board is most suitable for exterior use due to its waterproof glue?
Which type of engineered wood board is most suitable for exterior use due to its waterproof glue?
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For what purpose is laminated strand lumber (LSL) mainly used?
For what purpose is laminated strand lumber (LSL) mainly used?
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In engineered wood, what is the main disadvantage of reduced protection against aggressive or resistant species?
In engineered wood, what is the main disadvantage of reduced protection against aggressive or resistant species?
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Study Notes
Engineered Wood
- Engineered wood boards are made to provide a permanent form in the casting of gypsum concrete roof decks
- Types of gypsum boards include:
- Wallboard
- Type X gypsum board
- Core board
- Water-resistant backing gypsum board
Engineered Wood Lumber
- Glue-laminated wood, also called glulam wood, is made by joining smaller strips of wood with glue
- Major reasons to laminate: size, shape, and quality
- Wood is seasoned before lamination to lower than the usual desired moisture content, 12%
- Most common individual laminations are 2 inches (50mm) nominally thick (1 ½ in/38 mm)
- Adhesives are chosen according to moisture conditions under the member is subjected to
- Layers are oriented along the length of the lumber
- End joints are either scarf-jointed or finger jointed
Cross-Laminated Timber (CLT)
- CLT is a structural panel made from solid lumber, specifically dimension lumber, each layer glued perpendicular to the previous
- Wood is seasoned before lamination to lower than the usual desired moisture content, 12%
- Planed or sanded before assembly to ensure good wood-to-adhesive bonding
- Full stack is compressed in a hydraulic or vacuum press, then cured
- End joints are finger-jointed
- Made up of an odd number of layers for a balanced structural behavior
- Common thickness range from 2 ¼ to 16 inches (57-400 mm), widths range from 4-15 feet (1220-4500 mm), and lengths from 40-60 feet (12-18 m)
Structural Composite Lumber (SCL)
- SCL is a product substitute for solid lumber made from wood veneers or wood fiber strands and glue
- Includes laminated strand lumber (LSL), oriented strand lumber (OSL), laminated veneer lumber (LVL), and parallel strand lumber (PSL)
- LSL and OSL are made from shredded wood strands, coated with adhesive, then pressed into a rectangular cross section, and cured under heat and pressure
- LVL is made from thin wood veneer sheets, as wide as the member is deep, that are glued and laminated into thicker members
- LVL has higher shear strength than LSL and OSL
- More expensive than LSL and OSL but more affordable
Plywood
- Plywood is a composite wood product made by binding or fixing wood components together with adhesives
- Constructed by layering or arranging wood components in specific orientations to enhance structural strength and stability
- Exhibits excellent strength and dimensional stability, with reduced warping, twisting, and shrinking compared to solid wood
- Types of plywood include:
- Soft plywood for form lumber
- Hardwood plywood for paneling and finishing work
- Marine Plywood or Exterior Grade Plywood for exterior use where waterproof glue is used
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Description
Learn about the manufacturing process of engineered wood including steps like planing, gluing, pressing, and curing. Understand the characteristics and specifications of engineered wood products.
