Glossary For Treated Wood

 

.25 pcf

Retention level usually prescribed for above ground level use of CCA pressure treated lumber. Specifically refers to 1/4 lb. of CCA oxides/cubic foot of wood

.40 pcf

Retention level usually prescribed for ground contact use of CCA pressure treated lumber. Specifically refers to 4/10 lb. of CCA oxides/cubic foot of wood

.60 pcf

Retention level usually prescribed for structural members in touch with the ground. Specifically refers to 6/10 lb. of CCA oxides/cubic foot of wood

#1 kiln dried

#1 is the grade of lumber immediately following Select Structural. Kiln dried in this case means that the lumber has been dried to a minimum moisture content of 19% prior to treating

8# 50/50

A mix of creosote and kerosene specified by the railroads when ordering new RR ties.

baluster

An upright support for a rail

bar coded

An encoded number appearing on the end of a piece of lumber which can be read at a receptive point of sale terminal

beam

Usually describes the horizontal member attached to the post bearing the weight of the joist or other lateral member

CCA-C

Chromated Copper Arsenate, which has been mixed to formula C, which is the most up-to-date standard

chamfered

To trim square edges to a 45 degree diagonal, usually to eliminate splintering and unsightly edges

Consumer Information Sheets

A piece of literature in the treated wood literature rack which details handling suggestions and precautions for pressure treated lumber

COSTCUTTER®

An economical sort Std/#2 .40 CCA-C treated product that serves the same function as UniversalTM Wood but trades visual appeal for a lower cost

dog-eared
 

Flat top fencing that has the two top corners cut at a 45 degree angle to create a visual pattern

DRYDEK®
 

Brand name for waterproof decking. Unincised appearance grade lumber enhanced by "shell drying" and water repellent

edge
 

The two narrow planes on a piece of lumber

EPA

Environmental Protection Agency

face

The two widest planes in a piece of lumber

FF Udl

Full faced underlayment

FOHC

"Free of heart center." This term means the absence of pith from the finished lumber product

good face

The best of the two wide sides of a piece of lumber, for the intended use

grain raise

Separation of the wood fibers on the face of the lumber

hot-dipped (hd) galvanized

Applying zinc to metal via heat immersion versus electro-galvanizing (EG) methods. HD assures greater coating than EG method which is important when using metal fasteners with treated wood as some chemical reaction may occur between the treating chemicals and the fastener metal

incised

In treated lumber this refers to the knife perforations in the lumber. These aid in helping the chemical penetrate deeper into the lumber

joist

The horizontal member of the deck, that the decking is nailed to, which extends perpendicular to the house

knots

Dark blemishes in the lumber as a result of branches growing from the tree trunk

lattice

Prefabricated wooden architectural panels used to add privacy, screen off unsightly elevations, or simply to make visual breaks on large projects without screening out all light

Lifetime limited warranty label

Tags on the end of the lumber assuring customer that that particular piece of lumber is guaranteed

Lifetime limited warranty

A guarantee document which spells out the details of your claim rights. These can be found in the treated wood literature racks, generally located near the treated lumber

Outdoor® Wood

The brand name for the high quality, above ground products produced by McFarland Cascade. Outdoor® Wood signifies consistent appearance quality, lack of incisions, and a soft, cedartone color

P&TS

An abbreviation for plug and touch sanded when referring to plywood

penetration

In treating terminology, this refers to the depth that the treating chemicals permeate the lumber

Permanent Wood Foundation

An alternative construction method to concrete, utilizing wooden stud members and plywood supported in gravel

pith center

The bull's eye in the center of the trunk of a tree from which the growth rings radiate. (This is like the "core" of an apple and can separate from the rest of the lumber.) Also called heart center

Pole Barn

A simple structure using treated timbers as vertical members which serve to support horizontal framing and typically sheet metal siding and roofing

post

A term usually used to describe vertical construction members. These might be used in fences or as uprights supporting the deck beam

Post Caps

Western Red Cedar covers to be used on the top of 4 x 4/6 x 6 fence posts or deck posts to add decoration and to give some element of protection to the exposed end of the post

Rail-A-Deck®

A McFarland Cascade® railing system which, through the interchangeable use of five components, offers two different railing looks

retention

The amount of chemical that the lumber retains after treating process, usually referenced in terms of chemical/cubic foot; i.e., .25, .40, .60

S4S

Surfaced four sides. This means that the product has gone through a planer to "true up" the sizes and to eliminate the rough surface

select structural

The highest grade of normal domestic framing lumber

shell dry

Drying lumber in a kiln to reduce moisture content with no specific target moisture content

sorted

Product that is carefully scrutinized at McFarland Cascade to eliminate unsightly pieces and reduce fall down at the retail store level

split

Separation completely through the lumber from face to face

T&G

Refers to an abbreviation for tongue and groove which is a joining method on the edges of lumber and plywood products

turned plywood peeler cores

The center of the log that is turned on a lathe to produce plywood veneer

unincised

The lack of lumber incisions. Treated lumber products with no incisions are generally for above ground usage in appearance situations

Universal TM Wood

Sorted construction lumber incised for ground contact and treated to meet contact specifications

unsorted

Product that is bought for a specific grade but not inspected to eliminate unsightly defects such as holes, wane, splits, etc.

utility (#3)

A relatively low and inexpensive grade of lumber usually used for nonstructural and non-appearance applications. Utility is the nomenclature for 4" dimension (2 x 4, 4 x 4) and #3 is the correct nomenclature for wide dimensions (2 x 6-2 x 12)

wane

The absence of fiber on the edge of a piece of lumber