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What is KD in lumber?
ANSWER: KD stands for kiln dried and HT stands for heat-treated. This is a new designation added to some softwood lumber grade stamps since October 1, 2001.
Is spruce an expensive wood?
Cost: Construction quality spruce is readily available, and is not very expensive. But, the price of old tree wood with higher growth rings can be relatively high. Quartersawn pieces that are clear and free of knots also demand a high price.
Which is stronger yellow pine or spruce?
For all structural applications, pine and spruce are interchangeable. This includes studs and beams, struts, braces and framing for shelf supports. Because spruce has a higher strength-to-weight ratio, it may have a slight advantage over pine for structural applications.
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.
What does HT stand for on wood?
Each piece of wood used in the packaging, including braces and struts, must be stamped with “HT” meaning “heat treated,” or “KD HT” meaning “kiln-dried and heat treated,” to comply with the standard.
What does S GRN stand for?
“S-GRN” (surfaced green) means that the moisture content is above 19%. Most lumber is dried to the “S-DRY” (surfaced dry) condition, meaning that that the moisture content is less than 19%.
What are the disadvantages of spruce wood?
Disadvantages/Cons Insect Infestations: The spruce wood is vulnerable to insect infestation and the insects cause vast damage to the wood. Not Weather Resistant: On this type of wood, the wood preservatives are applied as it is not water resistant and rots quickly. Dull Gloss: This wood has a dull shine.
Is spruce harder than pine?
Pine is weaker than spruce, but it contains high amount of resins which ensure durability of created products. Spruce has creamy-white lumber. Thanks to its excellent tonal quality, spruce is often used for the manufacture of music instruments such as guitars and violins.
What is the hardest pine?
Which Pine is the hardest?
- Southern Yellow Pine is a fast-growing species group of pines which produces some of the strongest wood in North America.
- Generally acknowledged as the hardest wood, lignum vitae (Guaiacum sanctum and Guaiacum officinale) measures in at 4,500 pounds-force (lbf) on the Janka scale.
Which is stronger fir or spruce?
The higher the Janka rating, the harder, and often more durable, the wood. Spruce, pine and fir are all considered softwoods, but they vary in their hardness. Black spruce (Picea mariana) has a Janka rating of 520, making it a much harder option. Pines also come in many varieties, each with different Janka ratings.
What kind of wood is spruce used for?
Spruce lumber is made from one of the more than 30 varieties of tree in the genus Picea. A strong and relatively light wood, spruce lumber has many uses in a variety of industries. It is perfectly possible to have a box, a piano, and a full-sized boat all made from spruce. Spruce lumber is frequently used for house construction.
What kind of tree is the eastern spruce budworm?
The eastern spruce budworm (Choristoneura fumiferana) is a major pest of spruce trees in forests throughout Canada and the eastern United States. Two of the main host plants are black spruce and white spruce.
What does KD-HT mean on a lumber stamp?
(KD-HT means the wood was also heat treated to kill pests, a requirement for imported lumber.) Tom saves money by ordering S-GRN wood when framing a new house, figuring that all the wood will air dry at the same pace.
Why are spruce seedlings dying in the ground?
Seedlings that germinate late in the growing season are particularly vulnerable because they are tiny and have not had time to harden off fully. Mortality rates generally decrease sharply thereafter, but losses often remain high for some years.