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

  • Strike-Slip Fault (Transform Fault) Definition

    ByGeo Forward

    Strike-Slip Fault or Transform Fault Strike-Slip Fault (Transform Fault): In the field of geology, a strike-slip fault, or a transform fault, is a fault in which movement is parallel to the strike of the fault plane. The opposite of a strike-slip fault is a dip-slip fault. Left-Lateral or Right-Lateral Strike-Slip Fault A transform fault can…

  • Growth Fault

    ByGeo Forward

    Growth Fault Growth Fault: In geology, a growth fault is a strike-slip fault or dip-slip fault that moves contemporaneously with deposition. This causes the throw (amount of vertical displacement) to increase with depth and the strata to be thicker on the downthrown side as compared to the upthrown side.

  • Dry Strength

    ByGeo Forward

    Dry Strength “Dry Strength” is a value that represents the strength of a soil sample, when dry, as determined by the crushing test. There is a common geotechnical engineering laboratory procedure for determining the cohesiveness or plasticity of a sample with organic or inorganic clays and silts.  

  • Fault Creep

    ByGeo Forward

    Fault Creep Fault Creep: Fault creep means slow ground displacement of a strike-slip fault or dip-slip fault, that usually occurs without accompanying earthquakes. Fault creep can derive from tectonic activity, or be the result of excessive petroleum and groundwater pumping.

  • Control Panel for Methane Mitigation System

    ByGeo Forward

    Control Panel in a Methane Mitigation System Control Panel of a Methane Mitigation System: A methane mitigation control panel is the brain behind the active mitigation system. In accordance with the Los Angeles Department of Building and Safety (LADBS) Methane Code, Ordinance Number 175790, a control panel synchronizes methane alarm units with sensors and the…

  • Toe of a Slope

    ByGeo Forward

    “Toe” of a Slope Definition The “toe” of a slope is essentially the bottom, or baseline section, of the soil mass comprising the slope. It is also defined as the outermost margin of displaced material during a landslide. The toe of a slope is farthest away from the head scarp.