Standard Interior Birch 
Plywood Technical Data
 
Grades: B, BB, CP, C
Glue:
Urea Carbamide (interior)
Phenol - formaldehyde (WBP)

Plywood can be produced using both cross-banded plies and unidirectional plies (UNIPLY). Cross-banded plywood ensures the plywood is homogeneous in its mechanical properties. UNIPLY plywood provides extra flexibility along the fiber and makes the plywood edges look just like solid birch lumber.
 
Standard Sizes:
(mm)
1220 / 1250 / 1270 / 1375 / 1425 / 1475 / 1525 x
1220/ 1250 / 1270 / 1375 / 1425 / 1475 / 1525 
other sizes on request

Standard Thickness,
Number of Plies
Max. Tolerance,
Face Veneer Thickness
mm
 
mm
mm
3
3
+/-0.3
1.2
4
3
+/-0.3
1.2
5
5 (3)
+/-0.4
1.2
6
5
+/-0.4
1.4
6.5
5
+/-0.4
1.4
7
5 (7)
+/-0.4
1.4
8
7
+/-0.4
1.4
9
7
+/-0.4
1.4
10
7 (9)
+/-0.5
1.4
11.2
9
+/-0.2
1.4
11.7
9
+/-0.2
1.4
12
9
+/-0.5
1.4
15
11 (13)
+/-0.7
1.4
18
13 (15)
+/-0.7
1.4
21
15 (19)
+0.8/-0.9
1.4
24
17 (19)
+0.9/-1.0
1.4
27
19 (21)
+1.0/-1.1
1.4
30
21 (23)
+1.1/-1.3
1.4
From 6.0 mm plus face veneer thickness 1.8 mm on request

Each consignment of plywood is tested in the laboratory for the following parameters: shear strength along the glue line, tensile strength along the fiber, static bending strength along the fibers, formaldehyde class emission, moisture content.

Ultimate shear strength along the glue line - not less than 2.0 mPa

Ultimate static bending strength along the fiber on the outer veneer thickness of sheets from 9 to 30 mm: not less than 55 mPa

Ultimate tensile strength along the fiber thickness of sheets from 3 to 6.5 mm: not less than 30 mPa

Moisture content-5-l0%

Formaldehyde class emission: E1

All plywood is produced sanded (except Grade C) with smoothness at least 80 grit; smoothness up to 240grit is possible.

Brochure Contents
Preview
Introduction to Grading
Plywood Technical Data
B
BB
CP
C
Volume of a Pack of Plywood
Thickness Conversion Table


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Concannon Lumber
2950 SE Stark St, Suite 230
Portland, OR 97214-3082
Tel:  503-231-8881
Fax:  503-236-5614
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