PDF Publication Title:
Text from PDF Page: 074
Table 6. Criteria for choosing sample boards BOARDS THAT WILL DRY MORE QUICKLY Sapwood, though it’s usually wetter than heartwood Thin boards Low density species Red oak dries faster than white oak17 End grain and round knots Higher grade lumber BOARDS THAT WILL DRY MORE SLOWLY Heartwood, though it’s usually drier than sapwood Thick boards (8/4 lumber will dry 21⁄2 times slower than 4/4 lumber) High density species White oak dries slower than red oak Face and edge grain Lower grade lumber (dried more slowly to avoid lowering quality) Flatsawn boards will dry about 15% faster than quartersawn boards but will surface check lots more than quartersawn boards Quartersawn boards Upland oaks (growth rings narrower than 1⁄4- 1⁄2“) (Appalachian oaks are usually in this category) Lowland oaks (wider, wavy growth rings, higher proportion of fibers) It’s particularly important to select boards that represent different species (if for some reason you mixed your load), the heartwood/sapwood in the charge, typical flatsawn/riftsawn/quartersawn boards, and any variation in lumber thickness. For small kilns, look for several samples that will dry the most slowly, and make at least one sample from a board that you expect will dry the fastest. Different people use different length sample boards, though in general longer boards give you a better representation of the moisture content; two-foot sample boards are the shortest you should use. Keep in mind that you might want to recut a sample board later in the kiln run to verify that the estimated MC is correct, so it’s going to be to your advantage to use longer sample boards. 17 Don’t mix air dry red oak and white oak in the dry kiln. If they both go in at the same MC, white oak will dry slower throughout the kiln run, delaying the time to complete the drying. 74PDF Image | HARDWOOD DRY KILN OPERATION A MANUAL FOR OPERATORS OF SMALL DRY KILNS
PDF Search Title:
HARDWOOD DRY KILN OPERATION A MANUAL FOR OPERATORS OF SMALL DRY KILNSOriginal File Name Searched:
FOR128.pdfDIY PDF Search: Google It | Yahoo | Bing
5,000 BF Shipping Container Lumber Dry Kiln For Quality Lumber The 5,000 BF container kiln consists of one 40 foot high-cube aluminum shipping container... More Info
Shipping Container Lumber Dry Kilns by Global Energy Global Energy designed and developed the container kiln back in 1991. The purpose is to give access to portable sawmill owners, furniture makers, and small business the value added profit of dry kiln lumber and quality hardwoods... More Info
Vacuum Kiln Conversion Kit for Lumber and Wood Dry Kilns Convert your existing conventional dry kiln into a fast drying vacuum kiln. Similar to vacuum bagging in the boat building and aircraft industry, we have come up with a proprietary process which allows you to build a very simple vacuum kiln at a fraction of the price, and without the intensive conventional metal chamber structure... More Info
Vacuum Pump Cart System for Bagging Clamping Wood Drying and more Vacuum Cart with 2HP Pump and Dual Pistons with multiple multiplex vacuum ports and liquid reservoir... More Info
Vacuum Bagging Basics Vacuum bagging is a method of clamping, which has traditionally been used in the composites industry, but can also be used for vacuum drying materials, including wood products... More Info
CONTACT TEL: 608-238-6001 Email: greg@globalmicroturbine.com (Standard Web Page)