What is KD lumber?

What is KD lumber?

What is Kiln Dried (KD) Lumber? Green lumber is piled with spacers (kiln sticks) in between each layer to improve air circulation and is placed into a dry kiln to extract the internal moisture. KD lumber is dried to approximately 6-16% moisture content depending on the species, typically this takes between 2-6 weeks.

What is S4S lumber grade?

S4S stands for “surfaced on 4 sides”, meaning that the material is finished on all four sides. Dimensional lumber is commonly S4S. S4S finished lumber and dimensional lumber are labeled according to nominal size, or the size of the rough board before it was planed smooth.

What is S4S lumber used for?

Surfaced on Four Sides: S4S S4S is an abbreviation for “Surfaced on Four Sides”. It indicates a finish which renders both faces and both edges of a board planer-finished.

What does S2S & S4S mean when referring to lumber?

S2S= surfaced two sides, S3S = surfaced three sides and s4s = surfaced four sides. S2S – The board has been run through a planer producing two flat faces, but the edges are left rough.

What is KD 2×4?

KD means kiln-dried to at most a 19% moisture content. HT means that the wood has been heated through to kill pinewood nematodes. It makes sense that this lighter, local product is less expensive than the Douglas-fir stud from the West Coast. — J. K. Spruce Trees Photo: Sandy Richard on Flickr.

What does KD HT mean on lumber?

heat treated
Moisture Content You’ll get less movement with kiln-dried (KD) or surface-dry (S-DRY) lumber, which has a moisture content between 16 and 19 percent. (KD-HT means the wood was also heat treated to kill pests, a requirement for imported lumber.)

What is the best grade of lumber?

Hardwood grades are: FAS (First and Second) is the highest grade of hardwood lumber. It’s usually 6-inches x 8-inches and is 83 percent defect-free on its best side. Select is 4-inches x 6-inches and 83 percent defect free on its best side.

Is S4S lumber treated?

#1 S4S Hi-Bor Pressure-Treated Timber.

Is KD HT pressure treated?

The wood shown in this picture is a No 2 grade, KD-HT (Kiln-Dried, Heat Treated), S-P-F (Spruce-Pine-Fir). It has nothing to do with the wood being pressure treated (PT) at all. However, some KD-HT wood at your local lumber yard might have a tag on the end of the lumber that specifies PT.