Plywood


Deciduos plywood
Mark: FK (MR) for interior application (according to waterproof characteristic)
Standard of requirements: GOST 3916.1-96 ( that corresponds to ISO 2426-74, ISO 2428-74 )
Species of timber: alder,birch
Glue: urea formaldehyde resin (emission class E1)
Panel sizes: 1525х1525 мм, 1525х1475 мм, 1525х1250 мм
Thicknesses produced: 3; 4; 6; 8; 9; 10; 12; 15; 16; 18 mm
Thicknesses produced: 4; 5,5; 7; 8; 9; 10; 12; 15; 16; 18; 21; 24; 27; 30 mm
Sanded both sides, sanded one side, unsanded
Surface grades: I/II, I/III, II/III, II/IV, III/IV, IV/IV
Grade types according to different standards: (here is the correspondence of currently used GOST 3916.1-96 standard to old (not used) standarts GOST 10.55-71 and GOST 3916.1-89 )

GOST 3916.1-96 GOST 10.55-71 GOST 3916.1-89
Е - А
I B AB
II BB B
III CP BB
IV C C
Plywood is suitable for use in dry (service class 1) or humid (service class 2) conditions.
Service class 1 is characterised by a moisture content in the materials corresponding to a temperature 20°С and a relative humidity of the surrounding air only exceeding 65% for a few weeks per year. Service class 1 correspond to a plywood equilibrium moisture 12% of plywood.
Service class 2 is characterised by a moisture content in the materials corresponding to a temperature 20°С and a relative humidity of the surrounding air only exceeding 85% for a few weeks per year. Service class 2 correspond to a plywood equilibrium moisture 18% of plywood.

PLYWOOD GRADE I (B)
I (B) grade plywood has virtually no defects allowed partially joint, unjoint, loose knots, holes from them, worm-hole diameter not exceeding 6 mm in 3 pieces for 1 m², also allowed no more than 5 healthy intergrown knots per 1 m2 of a diameter of 15 mm and a slight brown streaks. This plywood can be varnished. 1-st grade plywood is used for the manufacture of laminated plywood.

PLYWOOD GRADE II (BB)
II grade (or 2). In this plywood grade partially fused, non-united, loose knots, holes from them wormhole diameter less than 6 mm in 6 pieces. 1 m2, is also allowed not more than 10 healthy intergrown knots per 1 m2 of a diameter of 25 mm, allowed to fix the surface sheet. Swirls and open defects are sealed inserts veneer. This plywood is used to cover a variety of finishing materials and colors.

PLYWOOD GRADE III (CP)
Grade III (CP) – admitted partially fused, non-united, loose knots, holes from them wormhole diameter not exceeding 6 mm in a quantity of 10 pieces. 1 m² surface of the sheet is also allowed healthy ingrown knots without limitation amount.

PLYWOOD GRADE IV (C)
Grade IV (C) – allowed any manufacturing defects. Partially fused, non-united, loose knots, holes from them wormhole allowed in unlimited quantities diameter not exceeding 40 mm, can only be guaranteed a good bonding. Their most cheap varieties of plywood, which is used for use in building construction and packaging, when the appearance of the face of the plywood plays a secondary role.
Numbers and total square of sheets in cubic meter and palette
Thickness Sheets in m3 Sheets in palette m3 in palette m3 in truck m2 in m3 m2 in palette
3 143,33 143 0,9977 29,9308 333,33 332,56
4 107,50 108 1,0047 30,14 250,00 251,17
5.5 78,18 78 0,9977 29,93 181,82 181,40
6 71,67 72 1,0047 30,14 166,67 167,45
7 61,43 62 0,9930 29,79 142,86 144,19
8 53,75 54 1,0047 30,14 125,00 125,58
9 47,78 48 1,0047 30,14 111,11 111,63
10 43,00 43 1,0000 30,00 100,00 100,00
12 35,83 36 1,0047 30,14 83,33 83,72
15 28,67 29 1,0116 30,35 66,67 67,44
16 26,87 27 1,0047 30,14 62,50 62,79
18 23,89 24 1,0047 30,14 55,56 55,82
21 19,60 20 0,9768 29,30 45,58 46,51
24 18,08 18 1,0047 30,14 42,05 41,86
27 16,07 16 1,0047 30,14 37,38 37,21
30 13,72 14 0,9768 29,30 31,91 32,56
Physical-mechanical properties
Name of property Value
Density, Kg/m3 640-670
Moisture content, % 5-10
Limit of strength when stretching along fibers of outer plies, MPa, not less then
30
Limit of strength when static bending along fibers of outer plies, MPa, not less then 45
Limit of strength when splitting along glue layer after staying in water within 24 hours, MPa, not less then 1.0