Lumber Thickness Measurement
Environmental rice hull lumber is measured and sawn in quarters on an inch. For example, 1 inch thick lumber is called 4/4 lumber (pronounced “four quarter” and means the lumber is four 1/4-inches thick. 5/4 would be five 1/4″ increments, or 1.25″, 6/4 would be 1.5″, etc. The thickness is measured at the thinnest spot used to establish the grade of the board.
Embossed Lumber Mouldings
Embossed mouldings are mouldings that have a decorative pattern pressed into the moulding in one of more places. The pattern is pressed into the pattern by using a special wheel with the specific pattern in it. Not only is pressure used, but the wheel is also heated, this helps the pattern to be embossed in the wood without tearing the grain. Most species of lumber can be embossed; the softer the wood the easier the process, but even hard species like Hard Maple can be embossed.
Engineering Wood Lumber Storage Process
Air Drying:We do not hurry our drying process. The lumber is first air dried by placing it on air drying sticks to allow air movement over the surface. The piles each have a roof to prevent weather from entering the pile and weights are put on the top to help keep the lumber flat. Air-dried lumber is suitable for use in exterior projects or where some small movement of the piece is not critical.
Kiln Drying:After air drying the lumber for approximately six weeks to three months, depending on the lumber thickness, it is then placed in a dry kiln which provides an environment of somewhat elevated temperatures and lowered humidity. Once the lumber reaches about 7% moisture content, it is ready for use to construct projects for interior use.
Lumber Storage: Kiln-dried lumber is next placed in temperature and humidity conditioned storage so it stays at the 7% moisture content achieved with kiln drying. If kiln-dried lumber is not properly stored it will eventually regain moisture and be subject to the same shrinkage issues as air-dried stock. Be sure to ask your supplier if he properly dries and stores his lumber.