KVH® solid structural timber

KVH® - the standard in modern wood construction. Technically dried WMC 15%, standardised and quality-monitored. 

KVH® solid structural timber

TRADITION FOR CRAFTSMANSHIP AND INDUSTRY

KVH® solid structural timber

At the Hirschberg site, we produce KVH®1plus®, a high-quality solid wood product for timber construction. As well as creating products for sustainable use, we strive to develop products from our valuable raw material that meet the highest quality requirements. This approach results from the values that form the basis of our self-perception and our working principles and that reflect the needs of our customers: high quality, innovative and sustainable!

 

KVH®-1plus® n-vis

 

Product description:

  • CE construction timber for the area that is not visible (n-vis), spruce C24
  • finger-jointed in accordance with DIN EN 15497
  • cut, heartwood-separated
  • dried to 15% +/- 3% wood moisture content
  • planed
  • chamfered edges

Product benefits:

  • dimensionally accurate
  • form and dimensional stability
  • calculable
  • quality-tested
  • decorative 

Solid structural timber KVH®-1plus® n-vis, planed and chamfered on four sides, spruce/fir

Available lengths according to data sheet or on request
Dimensions 100 mm 120 mm 140 mm 160 mm 180 mm 200 mm 220 mm 240 mm 260 mm 280 mm
50 mm X X X X X X X X    
60 mm X X X X X X X X X X
80 mm X X X X X X X X X X
100 mm X X X X X X X X X X
120 mm   X X X X X X X    

List by dimension made of KVH®-1plus

 

We would also be happy to produce KVH® for you according to the list without any length waste. Many lengths, packages and custom dimensions are also possible! Produced according to your requirements, labelled and delivered by us - for further processing exactly as you wish. 

Please contact us for more information!

>> ContaCt

    List by dimension

     

    Product description:

    • CE construction timber KVH® n-vis, spruce C24, finger-jointed DIN EN 15497, dried, planed, edges chamfered
    • packages are wrapped in transparent film, squared timbers firmly attached to the package
    • minimum quantity from 1.5 cbm
    • length-optimised poles without waste in double or multiple lengths (max. 13.50 m)
    • shortest possible length = 4.00 m
    • production-related oversize of the optimised pole of approx. 30 mm
    • allowance of 8 mm taken into account for multiple lengths per chop cut
    • individual items located in the pole are printed on the face of the label

    n-vis construction timber

     

    Product description:

    • construction timber for the area that is not visible
    • spruce
    • cut, heartwood-separated
    • dried to 15% +/- 3% wood moisture content
    • planed
    • chamfered edges

    Product benefits:

    • dry
    • dimensionally accurate
    • form and dimensional stability
    • calculable
    • quality-tested

    Construction timber n-vis, planed and chamfered on four sides, spruce/fir

    Available lengths according to data sheet or on request
    * Separation products
    Dimensions 60 mm 80 mm 100 mm 120 mm 140 mm 160 mm 180 mm 200 mm 240 mm
    40 mm X * X * X * X X X X X X
    60 mm X * X *              
    80 mm   X *              

    KVH®-1plus® SELECT

     

    Product description:

    • CE construction timber for the visible area SELECT, spruce C24
    • finger-jointed in accordance with 
    • DIN EN 15497
    • cut at least 
    • heartwood-separated
    • dried to 15% +/- 3% wood moisture content
    • planed
    • chamfered edges
    • SELECT grading
    • loose and fallen branches not permitted

    Product benefits:

    • dimensionally accurate
    • form and dimensional stability
    • calculable
    • quality-tested
    • decorative

    Construction timber KVH®-1plus® SELECT, planed and chamfered on four sides, spruce/fir

    Available lengths according to data sheet or on request
    Dimensions 120 mm 140 mm 160 mm 180 mm 200 mm 220 mm 240 mm
    60 mm X X X X X X X
    80 mm X X X X X X X
    100 mm   X X X X X X

    Construction timber, Douglas fir KVH®-1plus® SELECT

    Available lengths according to data sheet or on request
    Dimensions 100 mm 120 mm 140 mm 160 mm 180 mm 200 mm 240 mm
    60 mm X X X X X X X
    80 mm   X X X X X X
    100 mm X     X   X X

    Certificates

    You can find the corresponding declarations of performance for our products in our download area.

     

    >> DECLARATIONS OF PERFORMANCE

    Catalogue of requirements

    The best products for high demands

    rettenmeier® is your professional partner for quality products in the fields of specialist trade, wood construction and roofing. The benefits for our market partners range from comprehensive advice and information on all legal and product-related issues about creating ideal solutions through to the professional follow-up by our after-sales service.

    Sorting feature Requirements for SELECT Requirements for NSi Comments
    Sorting class in accordance with DIN 4074-1 At least S 10 TS or 10K TS, C 24 in accordance with DIN EN 338 At least S 10 TS or 10K TS, C 24 in accordance with DIN EN 338 The code K stands for a board or plank sorted as squared timber.
    Wood moisture content 15 % ± 3 % 15 % ± 3 % The specified wood moisture content is a prerequisite for a far-reaching waiving of preventive wood protection.
    Cut type heartwood-separated heartwood-separated Since the pith does not necessarily run through the centre of a tree, "heartwood-separated" is defined as follows: for a tree with an ideal growth form, the pith would be cut through in two-strand cutting.
    Wane Not permitted ≤ 10% of the side with the smaller cross-section Wane measured diagonally
    Dimensional accuracy of the cross-section DIN EN 336 dimensional accuracy class 2 b ≤ 100 mm ± 1 mm, b ≥ 100 mm ± 1.5 mm DIN EN 336 dimensional accuracy class 2 b ≤ 100 mm ± 1 mm, b ≥ 100 mm ± 1.5 mm The dimensional accuracy for the length dimension must be agreed between the purchaser and the supplier
    Branch condition DIN 4074-1 sorting class S 10 DIN 4074-1 sorting class S 10  
    Knottiness S 10: A ≤ 2/5 not over 70 mm In the event of automatic sorting, the branch sizes are not taken into account; otherwise, the following applies: S 10: A ≤ 2/5 Knottiness A is determined according to DIN 4074-1
    Bark inclusion Not permitted DIN 4074-1  
    Cracks, radial shrinkage cracks (dry cracks) Crack width of b ≤ 3% of the respective cross-section width DIN 4074-1 With SELECT, increased requirements compared with sorting class S 10 in accordance with DIN 4074-1
    Resin pockets Width b ≤ 5 mm - Additional criterion
    Discolourations Not permitted DIN 4074-1 With SELECT, increased requirements compared with sorting class S 10 in accordance with DIN 4074-1
    Insect infestation not permitted DIN 4074-1 With SELECT, increased requirements compared with sorting class S 10 in accordance with DIN 4074-1
    Distortion - - The permitted level of distortion is not defined further, as – given compliance with all other criteria – no intolerable distortion is to be expected.
    Longitudinal curvature With heart-separated cut ≤ 8 mm/2 m With heart-separated cut ≤ 8 mm/2 m  
    Processing of the ends Capped at right angles Capped at right angles  
    Surface quality Planed and chamfered Equalised and chamfered  
    Finger joint DIN EN 15497    

    Swelling and shrinkage dimensions

    Dimensional changes/differential swelling and shrinkage if the wood moisture changes by 1% each 0,24 %
    Swelling and shrinkage isotropy ratio tangential to radial 2

    Characteristic variables and key indicators

    Bulk density ρ (at approx. 15% wood moisture content) on average 450 - 480 kg/m³
    Water vapour diffusion resistance coefficient µ (DIN 4108) 40
    Thermal conductivity λR (DIN 4108) 0,13 W / (m*K)
    Dimensional and form stability Good
    Building material class (DIN EN 13501-1) D-s2, d0
    Building material class (DIN 4102) B2 (normally flammable)
    Burning rate on average 0,65 – 0,70 mm/min.
    Product Product rule Labelling
    Not finger-jointed KVH®-1plus® DIN EN 14081-1 with DIN 20000-5 CE mark
    Finger-jointed KVH®-1plus® DIN EN 15497 with DIN 20000-7 CE mark
    QLH®-Duo/Trio-plus® Laminated timber and laminated beam timber are produced in accordance with DIN EN 14080 with DIN 20000-3 + DIN EN 15497 with DIN 20000-7 CE mark

    The service life of wooden components used outdoors can be significantly increased if the issue of wood preservation is considered at the design stage. Otherwise, a component's useful life may be greatly affected by local conditions (high level of ambient moisture, permanent or occasional contact with water, lack of rear ventilation, etc.). On the other hand, favourable installation conditions can also considerably increase service life by, for example, preventing contact with soil or providing cover.

    Use classes for wood and wood-based products according to DIN EN 335-1

    UC WMC/exposure General conditions for use Insects Fungus Wood rot Wood pests in the sea Leaching procedure Durability class required
      Dry (constantly <20%) mean relative air humidity up to 85% Wood or wood product under roof, not exposed to weathering or moisture. Insect hazard can be excluded in accordance with 5.2.1. No No No No No 1 - 5
    1 Dry (constantly <20%) mean relative air humidity up to 85% Wood or wood product under roof, not exposed to weathering or moisture. Yes No No No No 1 - 4
    2 Occasionally moist >20% mean relative air humidity > 85%. Or temporary humidification due to condensate. Wood or wood product under roof, not exposed to weathering, a high ambient humidity can lead to occasional, but not permanent moistening. Yes Yes No No No 1 - 3
    3.1 Occasionally > 20% moisture content Wood or wood product not under roof, with weathering, but with no permanent contact with the ground or water. Accumulation of water in the wood not to be expected, even within spatially limited areas. Yes Yes No No Yes 1 - 3
    3.2 Frequently > 20% moisture content Wood or wood product not under roof, with weathering, but with no constant contact with ground or water, accumulation of water in the wood to be expected, including in spatially limited areas. Yes Yes No No Yes 1; 2

    Besides the individual species of wood selected and its natural durability, the service life of timber can be significantly influenced by structural timber protection. 

    If wood is exposed to high levels of moisture for lengthy periods, it will be damaged by fungal decay. This can be prevented by the proper planning of structural measures to protect the wood at the execution stage. 

    Where possible, upright, load-bearing timber components should never come into direct contact with the ground in external areas. To protect them from splashing, it is advisable to maintain a minimum gap of approx. 15 cm (mounting on supports). 

    Horizontal wooden structures should likewise avoid any direct contact with the ground and be kept a sufficient distance from the subsoil. To prevent water from collecting, horizontal areas should always have a slight gradient.

     

    Measures to extend the durability and service life of wooden structures:

    • Construct timber components so that water can always run off
    • Prevent waterlogging
    • Ensure adequate ventilation
    • Avoid contact with the ground
    • Use stainless steel screws that will not rust 
    • Clean and maintain timber components at regular intervals 
    • Manual protection is possible, e.g. by dipping, painting or spraying

    Contact

    sortimentimg
    Uwe Lutz

    Uwe Lutz
    Head of Sales Specialist and Building Materials Trading | Zunftholz

    +49 9853 338-206 lutz.uwe@rettenmeier.com