MANHEIM, Pa. -- Is your woodworking operation experiencing open glue joints or blotchy finishes? Do you need help with improving lumber yield or controlling moisture content?
Red alder (Alnus rubra), once considered a trash species and useful only for fuel, grows abundantly in the Pacific Coast regions of British Columbia, Washington and Oregon. It produces excellent lumber, and now demands fairly high prices.
It is a pioneer species, coming into the ecosystem after fire and logging disturbances, thereby protecting the exposed soils and watersheds. Trees mature within 40 to 60 years, reaching a typical height of less than 90 feet and a diameter often under 24 inches.
Q. We have some lumber that we planed on our two-headed planer. We are certain that the lumber was flat going and coming out. We then stacked the lumber and now about four weeks later, we are seeing a lot of pieces that are bowed. In fact, within the stack, all are bowed the same direction…ends down and center up. Where should we look?
Q. We get our lumber at 6 to 8 percent MC. We check its moisture to confirm. So, should we set the plant at 7.0 percent EMC (halfway between), or should we set the plant a little drier, like 6.8 percent EMC because we want to discourage any drying at all?