Alder Premium 7

PR7

PR7 is a knotty appearance grade with sound tight knots, yielding 83.3% Structurally Sound Cuttings.

PR7 is our top-of-the-line, sound, knotty appearance grade sorted for the wider boards. PR7 is sorted to 7.0” to 8.0” (+/- 1/8”) from our Premium (PRE) grade. PR7 is often used for wider door, base and crown mouldings, where the wider premium board is required. It does contain Alder’s highly desired, knotty appearance.

Length Specs:

84″ (2.13m) minimum

Width Specs:

7″ to 8″ (178mm to 203mm)

Cutting Specs:

	8’1″	8’3″	10’1″
13/16
4/4	•	•	•
5/4
6/4
8/4

Notes:

PRE admits all boards two board feet and over surface measure, yielding no less than 83.3% sound cuttings. The reverse side will be FRA grade or better.

Wane is limited to 25% of the width and 50% of the length. Wane may be divided, showing on both board edges.

Side bend limited to 1″ (25mm).

Face knot size is limited to 0.5″ (13mm) unsound and 1″ (25mm) sound in 4″ to 5.5″ (102mm to 140mm) widths. In boards exceeding 5.5″ (140mm) wide, knot size is limited to 1″ (25mm) unsound and 2″ (51mm) sound.

Notes:

PRE admits all boards two board feet and over surface measure, yielding no less than 83.3% sound cuttings. The reverse side will be FRA grade or better.

Wane is limited to 25% of the width and 50% of the length. Wane may be divided, showing on both board edges.

Side bend limited to 1″ (25mm).

Glossary