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 Red Alder (Alnus rubra) is the most plentiful hardwood on the Pacific Coast. It thrives in the low, moist conditions of the Pacific Northwest. Alder is a prolific, fast growing species that is medium in strength, low in durability and light in weight.
The lumber is of fairly straight grain, uniform texture and little distinctive figuring. When freshly cut, Alder is almost white, then darkens to a mellow reddish brown after exposure to air. After kiln drying to 68& moisture content (MC) the wood is a honey brown color. Alder works and turns easily. This wood glues, sands and finishes well and stains evenly.
Alder is used for furniture, casework, woodenware, toys, moulding and doors.
Grade Superior (Sup) available in 4/4, 5/4, 6/4, 8/4 thicknesses
This grade has the highest yield available for Red Alder Lumber. Graded from the better face with unlimited 3x72 or 4 x 36 cuttings. Yields 83% clear face cuttings. Reverse face must be "Cabinet grade or better. Widths 4-1/2 and wider allowing 5% down to 4. Lengths are 6', 7', 8', 9' and 10'. Heavy to 8' and 10'. Some 11 and 12' available by special order. Graded after kiln drying to 6-8% max 12% MC and S2S 4/4 to 15/16, 5/4 to 1-3/16, 6/4 to 1-7/16, 8/4 to 1-15/16. Note Pin Knots No Defect (PKND).
Grade Cabinet (Cab) - available in 4/4, 5/4, 6/4, 8/4 thicknesses
This grade has the second highest yield available for Red Alder Lumber. Sometimes referred to as #1 Shop with a #1 Shop back. Graded from the poorer face with unlimited 3x 36 or 4 x 24 cuttings. Yields 66% clear face cuttings. Widths 4-1/2 and wider allowing 5% down to 3-3/4'. Lengths are 6', 7', 8', 9' and 10'. Heavy to 8' and 10'. Graded after kiln drying to 6-8% max 12% MC and S2S 4/4 to 15/16, 5/4 to1-3/16, 6/4 to1-7/16, 8/4 to 1-15/16. Note Pin Knots No Defect (PKND).
Grade Custom Shop (Custom) - available in 4/4 and 5/4 thicknesses
This grade has the third highest yield available for Red Alder Lumber. Sometimes referred to as #1 Shop with a Sound back. Graded from the better face with unlimited 3x 36 or 4 x 24 cuttings. Yields 66% clear face cuttings and a "sound back. Widths 4-1/2 and wider allowing 5% down to 3-3/4'. Lengths are 6', 7', 8', 9' and 10'. Heavy to 8' and 10'. Graded after kiln drying to 6-8% max 12% MC and S2S 4/4 to 15/16, 5/4 to1-3/16 Note Pin Knots No Defect (PKND) in clear face cuttings.
Grade Common Shop (Com Shop) - available in 4/4 and 5/4 thickness
This grade has the fourth highest yield available for Red Alder Lumber. Sometimes referred to as #2 Shop. Graded from the better face with unlimited 3x 18 or 3 x 24 cuttings. Yields 50% clear face cuttings and allows "sound back in the cuttings. Widths 4-1/2 and wider allowing 5% down to 3-3/4'. Lengths are 6', 7', 8', 9' and 10'. Heavy to 8' and 10'. Graded after kiln drying to 6-8% max 12% MC and S2S 4/4 to 15/16, 5/4 to1-3/16 Note Pin Knots No Defect (PKND).
Grade #3 Shop - available in 4/4 thickness
This grade has the fifth highest yield available for Red Alder Lumber and is an economy grade suitable for upholstered furniture construction. Graded from the better face with unlimited 3x 24 sound cuttings. Yields 33% Sound cuttings. Widths 4-1/2 and wider allowing 5% down to 3-3/4'. Lengths are 6', 7', 8', 9' and 10'. Heavy to 8' and 10'. Graded after kiln drying to 6-8% max 12% MC and S2S 4/4 to 15/16, 5/4 to1-3/16 Note Pin Knots No Defect (PKND).
Grade Jacket Board (JB) - available in 4/4 thickness
This grade is similar to a narrow Custom Shop and a narrow Common and btr grade. Suitable for narrow clear rips and cross-cutting. Graded from the better face with unlimited 2x 24 to 48 cuttings. Yields 50% clear 1 face cuttings, reverse of cutting must be "sound back. Widths 3 to 4-1/2. Lengths are 6', 7', 8', 9' and 10'. Heavy to 8' and 10'. Graded after kiln drying to 6-8% max 12% MC and S2S 4/4 to 15/16 Note Pin Knots No Defect (PKND).
Grade Premium Frame (P Frame) - available in 4/4, 5/4 thicknesses
This grade is a knotty appearance grade where a small and tight knot is required. Mouldings and rustic casegoods and doors are the intended target. Graded from the better face with unlimited 4x 24 and minimum 1 4x84 Sound cutting. Yields 83% Sound cuttings with back being a Frame and better. Widths 4 and wider. Lengths are 6', 7', 8', 9' and 10'. Heavy to 8' and 10'. Graded after kiln drying to 6-8% max 12% MC and S2S 4/4 to 15/16, 5/4 to1-3/16.
Grade Standard Frame (Frame) - available in 4/4, 5/4 thickness
This grade is for structural boards for upholstery frame construction. Graded from the better face with minimum 1 sound cutting 4 x 72 and unlimited 4 x 24 sound cuttings. Yields 66% Sound cuttings. Widths 4 and wider. Lengths are 6', 7', 8', 9' and 10'. Heavy to 8' and 10'. Graded after kiln drying to 6-8% max 12% MC and S2S 4/4 to 15/16, 5/4 to1-3/16.
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