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Mechanical strength

The mecahnical strength properties of door cores only have little influence on the stability of the finished door. 

More significant factors are:

  • the technical properties of the deck and frame
  • the performance of all components under different climate

Sound insulation / Fire performance

The design of an acoustic door requires appropriate weight as well as low bending strength of the door. Therefore low bending strength and high compression resistance should be aimed at. 

Referring fire performance high bending strength of all wooden materials often results in high distortion. 


Thick: 32mm
RT / RK1RD
VL
VV
HVA
dimension
Bending Strength
- vertical
3,84,05,56,512,2N/mm²
- parallel to the manufactur. direction
1,11,21,51,81,8N/mm²
Flexibility Eb
- vertical900
900
800
1100
1800
N/mm²
- parallel  to the manufactur. direction120120
110
140
170
N/mm²
Tensile Strength 
σzb
> 0,5>0,6> 0,6>0,7>0,8N/mm²
Surface Pressure
max. limit without considerable deformation10
12
16
18
22
bar
Weight
- kg/m28,2/8,8
9,6
15,7
19,2
20,8
kg/m2
- kg/m3257/274
300
490
600
650
kg/m3
- density solid520525490600650kg/m3VSP

Please notice:

The figures mentioned above are average figures taken from various measurements. 

They are to be understood as approximate figures as they are only of secondary importance for door manufacturing. 
They are not worked out continuously. 

Surface Pressure :

The figures are taken ´dry´ and at room temperature. 

The figures mentioned above have to be reduced in case of :

  • moisture eg. glue application or wet skins
  • higher temperature after long pressing time 

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