OSB/1,OSB/2 ,OSB/3 ,OSB/4  MECHANICAL PROPERTIES

OSB/1,OSB/2 ,OSB/3 ,OSB/4  MECHANICAL PROPERTIES

Threshold value requirements for OSB/1 

 

Requirement

Test

Unit

Thickness range (mm, nominal)

Property

method

6 to 10

> 10 and < 18

18 to 25

Bending strength – major axis EN 310
N/mm3
20
18
16
Bending strength – minor axis EN 310
N/mm3
10
9
8
Modulus of elasticity in bending – major axis EN 310
N/mm3
2500

2500

2500
Modulus of elasticity in bending – minor axis EN 310
N/mm3
1200
1200
1200

Internal bond

EN 319
N/mm3
0.30
0.28
0.26

Swelling in thickness – 24 h

EN 317
%

25

25
25

Threshold value requirements for OSB/2

Requirement

Property

Test
Unit

Thickness range (mm, nominal)

method
6 to 10
> 10 and < 18
18 to 25
Bending strength – major axis
EN 310
N/mm3
22
20
18
Bending strength – minor axis
EN 310
N/mm3
11
10
9
Modulus of elasticity in bending – major axis
EN 310
N/mm3
3500
3500
3500
Modulus of elasticity in bending – minor axis
EN 310
N/mm3
1400
1400
1400
Internal bond
EN 319
N/mm3
0.34
0.32
0.30
Swelling in thickness – 24 h
EN 317
%
20
20
20

Threshold value requirements for OSB/3

Requirement

Test

Unit

Thickness range (mm, nominal)

Property
method
6 to 10
> 10 and < 18
18 to 25
Bending strength – major axis
EN 310
N/mm3
22
20
18
Bending strength – minor axis
EN 310
N/mm3
11
10
9
Modulus of elasticity in bending – major axis
EN 310
N/mm3
3500
3500
3500
Modulus of elasticity in bending – minor axis
EN 310
N/mm3
1400
1400
1400
Internal bond
EN 319
N/mm3
0.34
0.32
0.30
Swelling in thickness in 24h
EN 317
%
15
15
15

Requirements for moisture resistance

Bending strength after cyclic test – major axis
EN 321
+
EN 310
N/mm3
9
8
7

OPTION 1

Internal bond after cyclic test

EN 321
+
EN 319
N/mm3
0.18
0.15
0.13

OPTION 2

Internal bond after boil test

EN 1087-1
+
EN 319
N/mm3
0.15
0.13
0.12

Threshold value requirements for OSB/4

Requirement

Test

Unit

Thickness range (mm, nominal)

Property
method
6 to 10
> 10 and < 18
18 to 25
Bending strength – major axis
EN 310
N/mm3
30
28
26
Bending strength – minor axis
EN 310
N/mm3
16
15
14
Modulus of elasticity in bending – major axis
EN 310
N/mm3
4800
4800
4800
Modulus of elasticity in bending – minor axis
EN 310
N/mm3
1900
1900
1900
Internal bond
EN 319
N/mm3
0.50
0.45
0.40
Swelling in thickness –
24 h
EN 317
%
12
12
12

Requirements for moisture resistance

Bending strength after cyclic test – major axis
EN 321 + EN 310
N/mm3
15
14
13

OPTION 1

Internal bond after cyclic test

EN 321 + EN 319
N/mm3
0.21
0.17
0.15

OPTION 2

Internal bond after boil test

EN 1087-1
+ EN 319 
N/mm3
0.17
0.15
0.13
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