Relatively more decay resistant than sap wood

Lumber is stronger in what direction

Boards thickness

Dimensions lumber thickness

Timber thickness

Separation of wood fibers along the rays. Caused by drying of wood. It’s the result when surfaces of wood dry faster than its interior

Separation of wood fibers along the growth rings. It occurs during the growth of the tree

Occurs at the ends of a member and is a complete separation of wood fibers through the entire end.

The absence of wood or the presence of bark at the corner or the edge of a piece that result from the sawing process

Used to rate the strength and stiffness properties of a piece of lumber

Used to rate the visual properties of lumber intended for flooring, trim, cabinetry, and other non structural uses

Non destructive testing

Lowest appearance grade in which the glue smears & squeeze-out, knots, & splits are acceptable

Commonly specified in situations where the appearance of the member is relatively unimportant, such as in warehouse, or if the member is to be covered w/ a finish material

Intermediate between those of industrial and premium grades

A grade commonly specified where the appearance of the beam is important

Beams substitute composite laminated veneer lumber for the usually solid wood top & bottoms laminations in the beam

Structural capacity is increased by gluing a thin strip of high-strength fiber-reinforced plastic (FRP)

Structural panels from solid lumbers with the orientation of members in each layer alternating from those above and below

Strongest and stiffest type of non veneered panel. More economical than plywood and used for sheathing and sub-flooring of light frame wood bldgs.

Based material for for wood veneer and plastic laminate. Used as underlayment panel

Limited to Interior uses. Its most commonly used form is Medium-Density fiberboard (MDF)

Thin, dense panel made of highly compressed wood fibers. For residential siding as well as in general purpose panels of standard dimensions

Low-density panel made of wood (or vegetable) fibers and binders and coated with asphalt for water resistant

Made from finely processed recycled paper waste and are used for wall sheathing, acoustical isolation etc.

Panels made from birch, maple or alder veneers

Non-wood finer panels made from agricultural waste

Non-wood finer panels made from wheat or rice straw. Have significant structural capacity

Non-wood fiber panels that can used as alternatives to interior wall panel products and hardwood flooring

Non-wood fiber panels made from shreded wafer-thin wood strands, compressed and glued to form a panel

Ingredient in some adhesives and binders used in the manufacture of wood products

Structural adhesive for full exterior exposure

Structural adhesive with less moisture resistance, rated for interior (Dry exposure only)

Has emission level that fall somewhere between UF and PF

Made without formaldehyde and can substitute UF and PF in many applications