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

  • Embankment Dam

    ByAdam Kaligi

    What is an Embankment Dam? An Embankment Dam is a freshwater-retaining structure comprising excavated rock, soil, or a combination of rock and soil from nearby geological formations.  In fact, Embankment Dams are known as an “Earthfill Dam” when filled with soil, and a “Rockfill Dam” when filled with rocks. Earthfill Dams are most common. The…

  • Metamorphic Rock

    ByAdam Kaligi

    Metamorphic Rock Definition In the field of geology, the term “Metamorphic Rock” refers to a rock classification that is the result of the alteration of prior existing sedimentary rocks or igneous rocks. The alteration process is “metamorphosis, and can take place by various methods and environments. The metamorphosis process produces specific metamorphic rocks, on the…

  • Aphanitic

    ByAdam Kaligi

    Aphanitic Definition Aphanitic: In geology, the term aphanitic describes the texture of plutonic or volcanic igneous rocks, with grains that are not visible to the naked eye. In fact, an aphanitic texture is usually the result of faster cooling and solidification of liquid magma.

  • Methane Soil Gas

    ByAdam Kaligi

    Methane Soil Gas: In geology, methane soil gas refers to the confinement of CH4 within the interstitial pore spaces of subsurface soils. On Earth and potentially on Mars, methane derives from subsurface pockets of biogenic and petrogenic natural gas. To illustrate, accumulations of buried organic matter decay via microbial or thermal degradation. And as time…

  • Extrusive Rocks

    ByAdam Kaligi

    Extrusive Rocks: In the volcanology branch of geology extrusive rocks are igneous rocks that have been erupted onto the Earth’s surface, before forming and crystallizing. On the other hand, intrusive rocks form and crystallize under the Earth’s ground surface. Extrusive rocks are typically microcrystalline and aphanitic, because of the faster rate of cooling and solidification.

  • Juvenile Water

    ByAdam Kaligi

    Juvenile Water: In geology, juvenile water is water derived directly from magma, introduced into the Earth’s surface through geological processes such as magmatic and volcanic activity. Since juvenile water is derived from Earth’s center, its characteristics, are associated with higher temperatures and pressures.