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Spruce-pine-fir, or SPF, is the generic name for a variety of softwood species imported from Europe, North America and used for housing construction frames.
White Spruce, Black Spruce, Jack Pine, Balsam Fir, Lodgepole Pine, Black Spruce, Engelmann Spruce, Red Spruce, SPF
Picea glauca, Picea mariana, Pinus banksiana, Abies alba
SPF is soft, straight, even-grained, medium to fine-textured, and produces a lustrous finish. The heartwood is a pale yellowish white, and there is little difference between the heartwood and sapwood.
Overseas SPF is used for frames, general millwork, boxes and crates, though it is only imported into Australia for housing construction frames.
SPF is easily worked, glues well, is average in paint holding ability, and takes nails and screws satisfactorily. It is not very durable and is difficult to penetrate with preservatives.
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