McKillican | Green Reference - Terms starting with the letter T

Terms starting with ...

Tack	The property of an adhesive that enables it to form a bond of measurable strength immediately after adhesive and adherend are brought into contact under low pressure.
Tangential	Strictly, coincident with a tangent at the circumference of a tree or log, or parallel to such a tangent. In practice, however, it often means roughly coincident with a growth ring. A tangential section is a longitudinal section through a tree or limb perpendicular to a radius. Flat-grained lumber is sawed tangentially.
Temperature, Curing	The temperature to which an adhesive or an assembly is subjected to cure the adhesive. The temperature attained by the adhesive in the process of curing (adhesive curing temperature) may differ from the temperature of the atmosphere surrounding the assembly (assembly curing temperature).
Tenon	A projecting member left by cutting away the wood around it for insertion into a mortise to make a joint.
Tension	In an adhesively bonded joint, a uniaxial force tending to cause extension of the assembly, or the counteracting force within the assembly that resists extension.
Tension Wood	Abnormal wood found in leaning trees of some hardwood species and characterized by the presence of gelatinous fibers and excessive longitudinal shrinkage. Tension wood fibers hold together tenaciously, so that sawed surfaces usually have projecting fibers and planed surfaces often are torn or have raised grain. Tension wood may cause warping.
Texture	A term often used interchangeably with grain. Sometimes used to combine the concepts of density and degree of contrast between earlywood and latewood. In this handbook, texture refers to the finer structure of the wood (See Grain) rather than the annual rings.
TFM	This overlay category is referred to by many names including thermally fused melamine (TFM), low pressure, direct pressure or simply as melamine overlays. Sub categories include the names Polyester and Decorative Phenolics. Thermally fused papers generally weigh between 60 and 130 g/m2, and the paper formation is similar to the decorative sheet used for HPL. Thermally fused papers are saturated with reactive resins and partially cured at the point of manufacture to allow for storage and handling of the paper. Final curing is done at the time of hot press lamination when the resins form a hard, permanent thermoset bond between the paper and the substrate. No additional adhesives are required. Common end-use applications of thermally fused papers include laminate flooring, kitchen cabinets and countertops, shelving, store fixtures and home office furniture.
Thermal Break	A material of low heat conductance used to reduce the flow of heat. For example, the vinyl separating the interior and exterior frames in some metal windows.
Thermal Mass	Thermal mass is any material in the home that absorbs and stores heat. Concrete, brick, tile and other masonry materials are the most common choices for thermal mass in a passive solar building, these materials absorb and release heat slowly and are easily and inexpensively integrated into the house design. Also known as fabric energy storage.
Thermoplastic	(1) Capable of being repeatedly softened by heat and hardened by cooling. (2) A material that will repeatedly soften when heated and harden when cooled.
Thermoset	A cross-linked polymeric material.
Thermosetting	Having the property of undergoing a chemical reaction by the action of heat, catalyst, ultraviolet light, and hardener, leading to a relatively infusible state.
Thermosetting plastic	Thermosetting plastics (thermosets) are polymer materials that irreversibly cure to a stronger form. The cure may be done through heat (generally above 200 degrees Celsius), through a chemical reaction (two-part epoxy, for example), or irradiation such as electron beam processing.
Theromally fused Melamine	See "TFM" defination
Tight Cooperage	Cooperage used as containers for liquids, semisolids, or heavy solids. Staves are well fitted and held tightly with cooperage-grade steel hoops.
Timber, Standing	Timber still on the stump.
Timbers	Lumber that is standard 114 mm (nominal 5 in.) or more in least dimension. Timbers may be used as beams, stringers, posts, caps, sills, girders, or purlins.
Timbers, Round	Timbers used in the original round form, such as poles, piling, posts, and mine timbers.
Time, Assembly	The time interval between the spreading of the adhesive on the adherend and the application of pressure or heat, or both, to the assembly. (For assemblies involving multiple layers or parts, the assembly time begins with the spreading of the adhesive on the first adherend.)
Time, Curing	The period during which an assembly is subjected to heat or pressure, or both, to cure the adhesive.
Toughness	A quality of wood that permits the material to absorb a relatively large amount of energy, to withstand repeated shocks, and to undergo considerable deformation before breaking.
Tracheid	The elongated cells that constitute the greater part of the structure of the softwoods (frequently referred to as fibers). Also present in some hardwoods.
Transfer	In wood bonding, the sharing of adhesive between a spread and an unspread surface when the two adherends are brought into contact.
Transverse	Directions in wood at right angles to the wood fibers. Includes radial and tangential directions. A transverse section is a section through a tree or timber at right angles to the pith.
Treated Wood Products	Wood that is treated to extend its service life and make it more resistant to fungi and other pests.
Treenail	A wooden pin, peg, or spike used chiefly for fastening planking and ceiling to a framework.
Trim	The finish materials in a building, such as moldings, applied around openings (window trim, door trim) or at the floor and ceiling of rooms (baseboard, cornice, and other moldings).
Triple Bottom Line	An expanded reporting format that combines economic, environmental, and social concerns.
Truss	An assembly of members, such as beams, bars, rods, and the like, so combined as to form a rigid framework. All members are interconnected to form triangles.
Tvis	The visible transmittance is the fraction of visible light transmitted through a window.
TVOC	The Total VOC (TVOC) level in air is used an indicator of whether or not elevated VOCs exist in a building. There have been some studies that show that mixtures of low levels of VOCs can cause sensory irritation responses from those exposed. Human responses can include perception of poor indoor air quality or "general discomfort"; irritation to the eyes, nose, and throat; discomfort due to odor; and headache. Ttotal VOC can be easily measured in the air.
Twist	A distortion caused by the turning or winding of the edges of a board so that the four comers of any face are no longer in the same plane.
Tyloses	Masses of parenchyma cells appearing somewhat like froth in the pores of some hardwoods, notably the white oaks and black locust. Tyloses are formed by the extension of the cell wall of the living cells surrounding vessels of hardwood.