Pine and spruce Edge Glued Panels
Pine and spruce EGP is very popular material. They are used in furniture industry and in construction.
Pine and spruce Edge Glued Panels for furniture are usually with sound knots. The panels are called knotty pine panels, or Scandinavian pine panels. They are very nice in appearance and very easy to machine.
Pine and spruce Edge Glued Panels for construction sometimes called pine blockboard are used for wall panelling, for making shelves during construction, for elements of stairs.
Simplified grading rules for pine and spruce EGP are the following:
|Defects||Grade A||Grade B||Grade C|
|Sound knots with cracks up to 1 mm wide||Allowed with diameter up to 30 mm||Allowed with diameter up to 40 mm||Allowed|
|Firm black knots||Allowed with diameter up to 10 mm||Allowed with diameter up to 20 mm||Allowed with diameter up to 30 mm|
|Black rotten or falling out knots||Not allowed||Rapairing by patches||Rapairing by patches|
|Blue stain||Not allowed||Allowed on the area of about 10%||Allowed on the area not more than 505 of total area of the panel|
|Rotten or decayed wood, bark||Not allowed||Not allowed||Not allowed|
|Heartwood||Not allowed||Allowed with maximum size 5*200 mm||Allowed with maximum size 10*400 mm|
|Resin pockets||Not allowed||Allowed with size 3*30 mm putty filled||Allowed with size 5*40 mm putty filled|
|Insect holes||Not allowed||Not allowed||Allowed in small quantities|
|Machining defects such as tearing out, bad planing, unsanded spots||Not allowed||Allowed with the size not more than 2*5 mm||Allowed with the size not more than 4*10 mm|