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Solid structure wood: the high-tech timber KVH®

Solid structure wood, also known as KVH®, is a special kind of timber which is dimensionally accurate and dimensionally stable due to technical wood drying. This means that only tiny changes of size and shape are to be expected when the wood is installed. Solid structure wood offers some benefits:

  • Statically determinable material due to quality sorting to DIN 4074 S 10.
  • Equally good quality from quality-controlled production.
  • Homogeneous wood appearance due to the utilization of solid wood.
  • No chemical wood protection of dry installed wood required.
  • Wood as building material permanently binds carbon dioxide (CO2).

Our results regarding solid structure wood

Merkle Holz offers a complete package:

  • Standard stock KVH® nSi in 5 and 13 metres available any time.
  • Up to 14 metres length available.
  • Large raw material yard; more than 80 different dimensions always available in a dry state.
  • Douglas-fir KVH® in 20 dimensions always on stock.
  • KVH® produced by list.
  • Machined structures ready for installation.
  • Swift and reliable delivery.
  • Special requests such as impregnation, millimetre severing or profil planing.

Requirements: Quality criteria of KVH®

Sorting feature Requirements on

KVH®-NSi
industrial quality

Sorting class DIN 4074-1 sorting class C 24
Product standard DIN EN 14081-1 for non finger jointed KVH®
DIN EN 15497 for finger jointed KVH®
Timber moisture 15% ± 3%
Cut type heart-separated
Tree edge measured across
< 10% of the smaller cross-section side
Dimensional accuracy of the cross section DIN EN 336, dimension tolerance class 2
≤ 10 cm ± 1.0 mm, > 10 cm ± 1.5 mm
Knot state DIN 4074-1
Sorting class S 10
Knot contents
A ≤ 2/5,
not over 70 mm
Bark pockets DIN 4074-1
Cracks, radial shrinkage cracks
(drying cracks)
DIN 4074-1
Resin galls Width b ≤ 5 mm
Discolouration DIN 4074-1
Insect attack DIN 4071-1
Longitudinal warping / Twisting = 8 mm / 2 m
Processing the ends Cut at right angle
Surface condition Levelled and chamfered

Our scope of delivery regarding KVH®

Spruce nSi
Thickness Width
  6 8 10 12 14 16 18 20 22 24 26 28
4            
5        
6
7            
8  
10    
12      
14        
Douglas-fir nSiSi
  10 12 14 16 18 20 24
6
8  
10        
12      
14            

Dimensioning of KVH®

More information: www.kvh.eu

KVH