Lumber Moisture Content Grade

Lumber Moisture Content Grade

Lumber moisture grading is a manufacturer-provided value of moisture content, for consumers and contractors to use. There are five (5) lumber moisture content designations (S-GRN, S-DRY, KD, MC 15, and HT).

Lumber Moisture Grading

Lumber grade “S-GRN” stands for “surface green,” which means it is not dry, and has a moisture content greater than 19%. Whereas grade “S-DRY” stands for “surface dry,” and means the lumber was air-dried to reach a moisture content that is less than or equal to 19%. Moreover, lumber moisture grade “KD” stands for “kilin dry,” which means the lumber was dried using a heated kilin, for a moisture content less than or equal to 19%. And lumber grade “MC-15” stands for “moisture content 15%,” meaning the lumber has been treated to a level that is less than or equal to 15%. Lastly, grade “HT” stands for “heat-treated,” meaning the lumber has been treated to at least 133° Fahrenheit for at least 30 minutes. And this is understood to eliminate insects living in the wood.

Similar Posts

  • U-Shaped Kitchen

    ByGeo Forward

    U-Shaped Kitchen U-Shaped Kitchen: A U-shaped kitchen, or a horseshoe kitchen, is a general kitchen plan layout with counters, walls, and cabinets that generally form a square-like or rectangular-like shape of the letter “u.”  In the State of California (and other states with similar building code standards), U-shaped kitchens must have a minimum of 60-inches…

  • Environmental Geology

    ByGeo Forward

    Environmental Geology Environmental Geology: (en·vi·ron·men·tal ge·ol·o·gy) a branch of geology that relates to the impact of human activity on Earth, and the pollution of geologic formations, reserves, and resources. Common focus points of environmental geology are contaminated soil, groundwater aquifers, lakes, rivers, and the ocean. Professional geologists assess and remediate contamination plumes in all media,…

  • Licensed Professional Geologist

    ByGeo Forward

    Licensed Professional Geologist A “Licensed Professional Geologist” or a “Certified Professional Geologist” is a person who is certified by a State and/or Federal agency (such as the California Department of Consumer Affairs, Board for Professional Engineers, Geologists & Land Surveyors), and has proven be educated, formally trained and professionally competent per government standards, to practice…

  • Effective Size (D10)

    ByGeo Forward

    Effective Size (D10) “Effective Size” (D10) is an engineering geology term. Effective Size represents a diameter that directly corresponds to the percentage, by weight, of grains that equal to 10% on the grain-size diagram. To illustrate, 10% of the soil sample particles are finer-grained, and 90% of the sample particles are coarser than the “effective…