Oriented strand board: A type of wood constructed by layering adhesive and wood strands.

“Strand plies” sit as alternating layers that run perpendicular to each other.
Waferboard, a weaker and less-stiff cousin of osb, is really a homogeneous, random composition.

• Rough SawnA decorative APA Siding treatment imparting a rough, rustic appearance by saw-scoring the surface of a panel during manufacture.
• Both particle board and plywood have smoother finishes than OSB and therefore are better fitted to uses that want a smooth finish.
• Plywood with an “Exterior” bond classification would work for repeated wetting and redrying or long-term contact with weather.
• Furthermore, the engineering properties and uses of the EWPs are illustrated.

In the late 1960’s advances in adhesive technology brought southern pine plywood to residential builders.
Today, southern pine plywood makes up about about half of all structural plywood sold.
The materials investigated were five different commercially available woodfiber‒plastic composites.
The overall conclusion drawn from these investigations is that the cheapest degree of edge wear is found in solid wood machining.
The reason for that is hypothesized to be the contamination content in the wood‒plastic composites, and pigments useful for plastic coloring.

All About Pressed Board

Portland Manufacturing Company made the first structural plywood from western woods in 1905.
This plywood, like all structural plywood made before mid 1930’s, was bonded with non-waterproof blood and soybean glue.
Delaminations were routine until waterproof synthetic resins were developed during world war II.
The technical fix for delamination was inspired by the 1950’s housing boom.

I-joints are manufactured using lumber or SCL flanges and OSB webs.
Typically, flanges and webs are bonded using exterior-type adhesives such as PF and pMDI.
The shear properties of I-joints are given by OSB webs, while the flanges provide the bending properties of I-joints since OSB has higher shear properties than plywood .
OSB is also used in industrial applications such as for example shelving and packaging in commercial and industrial structures .

Created from flaked wood strands with a higher length-to-thickness ratio.
Makes efficient use of wood resources with the strands via fast-growing species.
Strands are in the same direction and combined with glue and pressed together.
“The influence of fines content and panel density on properties of mixed hardwood oriented strandboard,”Wood Fiber Sci.39, 2-15.
Advancement in technology and manufacturing units for press technology the decoration of the materials is incredibly consistent.

Laminated Strand Lumber (lsl) And Oriented Strand Lumber (osl)

Department of Commerce standards by approved third party agencies.
Manufacturers must test their panels for quality and performance on a regular basis.
OSB is made with layers of thin, rectangular strands or flakes of wood which are made by feeding freshly cut hardwood or softwood logs through a cutting machine called a strander.
Each layer of strands is alternately placed perpendicular to the previous layer, which provides bending support in two directions.

Grain RaiseThe condition at first glance of a plywood panel resulting from harder or denser wood fibers swelling and rising above softer surrounding wood.
Face GrainDirection of the grain of the outer ply of a veneer-faced panel with regards to its supports.
A panel’s greatest stiffness and strength is parallel to the face grain.
Therefore, in construction, run the face grain or long dimension of the panel across supports for greatest stiffness and strength.
Edge VoidA panel defect where the edge or end of an inner ply has split or broken away during manufacture, leaving a gap in the edge of the plywood panel.
CupCrosswise distortion of a wood structural panel from its flat plane.
BlowA localized delamination due to steam pressure buildup through the hot pressing operation.

Wood FoundationA residential and light frame foundation system utilizing pressure-preservative-treated plywood panels and wood framing instead of poured concrete footings and masonry or poured concrete walls.
The system is commonly known as the Permanent Wood Foundation .
The system can often be installed on a prepared site in under half of a day in nearly any weather, speeding construction and reducing costs.
The PWF is also applicable to crawl-space foundation construction.

• Nail PoppingFlooring nails sometimes appear to “pop” up so that nail head impressions are visible on the surface of the finished floor covering.
• TelegraphingShow-through on a smooth overlaid wood structural panel surface of underlying grain or defects.
• PS 1 specifies sizes, shapes and amounts of allowable patches in given veneer grades.
• To the layperson, an OSB panel might look similar to plywood or particle board.

PRF gets the advantage over PF to be curable at room temperature because of being considerably faster in reaction, and has similar good mechanical properties and durability performance to PF .
Some manufacturers purchased PRF because the adhesives for strand-based wood products.
Is an engineered structural-use panel manufactured from thin wood strands bonded as well as water-resistant resin, typically PF or pMDI.
It is used extensively for the roof, wall, and floor sheathing in residential and commercial construction.
The wood strands routinely have an element ratio of at least 3.
The orientation of different layers of aligned strands gives OSB its unique characteristics, including greater bending strength and stiffness in the oriented or aligned direction.

Choosing Between Oriented Strandboard And Plywood

The relationship between allowable uniformly distributed live load and span is given in Table 4 .
That’s why we want to help you make sure every part of one’s structure is as good as it can be.