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TECHNICAL CHARACTERISTICS - KLH UK characteristics.2012-02-09TECHNICAL CHARACTERISTICS The technical...

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  • TECHNICAL CHARACTERISTICS

    The technical characteristics of KLH cross-laminated timber panels are:

    Board Format Max. length 16.50mFor UK transportation, we would recommend a maximum length of 13.50m

    Max. width 2.95

    Board Thickness Standard thicknesses are between 57 - 320mm, but panels can be created up to 500mm if required

    Board Layers Layers can be between 3 - 9 layers, standard layers are:3 layers - 60, 63, 78, 90, 94, 98, 102, 108 mm5 layers - 95, 101, 117, 125, 128, 146, 158, 162, 170, 182 mm7 layers - 202, 226, 256 mm

    Dimensional Stability Parallel to board Negligible movementNormal to board 0.2 mm/m per % moisture outside

    Standard 12% 2%Moisture 12% +/-2 technologically driedSurface Panel Quality Domestic Visual Quality

    (Wsi)Industrial Visual Quality(Isi)

    Non Visual Quality(Nsi)

    Fire Performance

    Requirement Verification method Value

    Reaction to fire EN 1135011 Euroclass Ds2Euroclass Dfls1

    Resistance to fire Charring rate of all lamella including outer lamella Charring rate of the outer lamella only

    BS EN 199520.76 mm/min0.67 mm/min

    Acoustic Performance

    Requirement Verification method Value

    Airborne sound insulation KLH 94 3 s TT KLH 145 5 s TL

    BS EN 123541 ~ 33 dB~ 37 dB

    Impact sound insulation BS EN 123542 -Sound absorption - -

    Thermal Performance

    Requirement Verification method Value

    Thermal conductivity, BS EN 12524 0,13 W/(m K)Specific heat capacity, Cp BS EN 12524 1600 J/(kg K)Air tightness BS EN 13829 -

    Durability

    Requirement Verification method ValueDurability of timber - Service class BS EN 19951 1 and 2

  • KLH Panel Type: TL (Top Layers Longitudinal)

    Requirement Verification method ValueModulus of elasticity Parallel to the grain of the outer lamella, E0, mean Perpendicular to the grain direction of the outer lamella, E90, mean

    Ieff 12,000 N/mm2

    370 N/mm2

    Shear modulus Parallel to the grain of the outer lamella, Gmean Perpendicular to the grain direction of the outer lamella, GR, mean

    EN 338 690 N/mm250 N/mm2

    Bending strength Parallel to the grain of the outer lamella, fm, k

    Weff 24 N/mm2

    Tensile strength Perpendicular to the grain of the outer lamella, ft, 90, k

    EN 1194, reduced 0,12 N/mm2

    Compressive strength Perpendicular to the grain of the outer lamella, fc, 90, k

    EN 1194 2,7 N/mm2

    Shear strength Parallel to the grain of the outer lamella, fv, k Perpendicular to the grain direction of the outer lamella, fR, v, k

    EN 1194Agross

    2,7 N/mm21.5 N/mm2

    Characteristic strength for actions perpendicular to the span of the panel

  • KLH Panel Type: TT (Top Layers Transverses)

    Characteristic strength for actions in the plane of the panel

    Requirement Verification method ValueModulus of elasticity Parallel to the grain of the outer lamella, E0, mean

    Anet, Ieff 12,000 N/mm2

    Shear modulus Parallel to the grain of the outer lamella, Gmean

    Anet 250 N/mm2

    Bending strength Parallel to the grain of the outer lamella, fm, k

    Wnet 23 N/mm2

    Tensile strength Parallel to the grain of the outer lamella, ft, 0, k

    EN 1194 16.5 N/mm2

    Compressive strength Perpendicular to the grain of the outer lamella, fc, 0, k Concentrated, parallel to the grain of the outer lamella fc,0,k

    EN 1194 24 N/mm230 N/mm2

    Shear strength Parallel to the grain of the outer lamella, fv, k

    Anet 5,2 N/mm2

    Further details on the technical characteristics of KLHs cross-laminated timber panels are available within the KLH UK Cross-Laminated Timber Specification document.

  • Requirement of Insulation and U-Values

    Comparing cross-laminated timber with a common building material such as concrete (thermal conductivity = ca. 1.8 W/m*K ) or bricks, the insulation performance of timber ( = 0.13 W/m*K ) is naturally excellent.

    The tables below show the minimum thickness of insulation needed to meet the requirements of UK standards (England, Wales, Scotland and Northern Ireland). The minimum U-values are listed as well as the specified thermal conductivity of the insulation material that might be used. U-values are given by the Approved Document L1A (British Building Regulations).

    Typical KLH Panel - 94mm Thickness

    KLH Panel 94mm Required Thickness (in mm) of insulation dependent on its thermal conductivity (lambda in W/m*K)

    Area Element Required U-Value W/m2*K

    0.045 0.040 0.035 0.030 0.025 0.024 0.023 0.022 0.021 0.020

    England, Wales, N. Ireland

    Wall 0.35 120 105 95 80 70 65 65 60 55 55

    Floor 0.25 150 135 115 100 85 80 80 75 70 70

    Roof 0.25 195 175 155 130 110 105 100 95 95 90

    Scotland Wall 0.30 120 105 95 80 70 65 65 60 55 55

    Floor 0.25 150 135 115 100 85 80 80 75 70 70

    Roof 0.20 195 175 155 130 110 105 100 95 95 90

    Typical KLH Panel - 128mm Thickness

    KLH Panel 128mm Required Thickness (in mm) of insulation dependent on its thermal conductivity (lambda in W/m*K

    Area Element Required U-Value W/m2*K

    0.045 0.040 0.035 0.030 0.025 0.024 0.023 0.022 0.021 0.020

    England, Wales, N. Ireland

    Wall 0.35 110 95 85 75 60 60 55 55 50 50

    Floor 0.25 140 125 110 95 80 75 70 70 65 65

    Roof 0.25 185 165 145 125 105 100 95 90 90 85

    Scotland Wall 0.30 110 95 85 75 60 60 55 55 50 50

    Floor 0.25 140 125 110 95 80 75 70 70 70 65

    Roof 0.20 185 165 145 125 105 100 95 90 90 85

    Typical KLH Panel - 140mm Thickness

    KLH Panel 140mm Required Thickness (in mm) of insulation dependent on its thermal conductivity (lambda in W/m*K)

    Area Element Required U-Value W/m2*K

    0.045 0.040 0.035 0.030 0.025 0.024 0.023 0.022 0.021 0.020

    England, Wales, N. Ireland

    Wall 0.35 105 95 80 70 60 55 55 50 50 50

    Floor 0.25 135 120 105 90 75 75 70 65 65 60

    Roof 0.25 180 160 140 120 100 95 95 90 85 80

    Scotland Wall 0.30 105 95 80 70 60 55 55 50 50 50

    Floor 0.25 135 120 105 90 75 75 70 65 65 60

    Roof 0.20 180 160 140 120 100 95 95 90 85 80

  • Panel Surface Quality

    Wood as a natural material is highly varied in its structure and has many natural characteristics. Often such characteristics can impair its visual appearance. Common visual characteristics are knots, annual rings and fissures.

    The surface appearance of KLH cross-laminated timber panels is dependent on the surface type specified: Domestic Visual Quality (Wsi) Industrial Visual Quality (Isi) Non-Visual Quality (Nsi)and the outer lamella direction i.e. TT or TL.

    The surface appearance of Wsi panels is of sufficient quality to be left exposed internally, should it be required, but the Nsi is manufactured as a non-visual panel which should not be left exposed. As standard, Wsi and Isi visual surface finishes are only available on one side.

    Domestic Visual Quality (Wsi)For TT panels the outer lamella are perpendicular to the manufactured panel length and are generally used as wall elements. For TL panels the outer lamella are parallel to the manufactured panel length and are generally used as floor and roof elements.

    Depending on the orientation of the outer lamella (TT or TL panels), the outer lamella may be finger-jointed. The width of the boards in the outer lamella of TL panels may vary from 80 to 120mm. The outer lamella of TT panels are formed from boards < 80 mm wide which are then edge glued to form boards up to 1200 mm wide. The outer lamella of TT and TL panels are visuallyselected to have minimum defects.

    The surface lamella are planed and sanded to achieve appearance class A/B in accordance with BS EN 13017-1:2001 Table 1 (see the KLH UK Cross-Laminated Timber Specification document, Table 7 for further details).

    At a moisture content of 12% 2% a maximum gap width of 2 mm between the lamella is permissible. The edges of all Wsi panels are chamfered as standard.

    Industrial Visual Quality (Isi)For TT panels the outer lamella are perpendicular to the manufactured panel length and are generally used as wall elements. For TL panels the outer lamella are parallel to the manufactured panel length and are generally used as floor and roof elements.

    Depending on orientation of the outer lamella (TT or TL panels), the outer lamella may be fingerjointed. The outer lamella width may vary from 80 to 240mm.

    The surface lamella are planed and lightly sanded to achieve appearance class B in accordance with BS EN 13017-1:2001 Table 1 (see the KLH UK Cross-Laminated Timber Specification document, Table 7 for further details).

    At a moisture content of 12% 2% a maximum gap width of 4mm between the lamella is permissible.

    NonVisual Quality (Nsi)There is no appearance class in accordance with BS EN 13017-1:2001 Table 1. Boards are C24 (10% C16 permissible) in accordance with BS EN 14081-1:2005 Table 1.

    Nsi panels will not be provided for visual surfaces unless requested by the client on the understanding that KLH UK will not accept any liability for visual appearance of Nsi panels.

    The definition of surface finishes above are subjective and may lead to widely differing interpretations on what constitutes an acceptable finish. Reference panels demonstrating surface finishes Wsi, Isi and Nsi are available on request from our London office, or can be viewed by appointment.

  • TECHNICAL APPROVALSKLH has third party technical certification and accreditations for the manufacture of KLH solid timber panels including:

    Full European Technical Approval (ETA 06/138)

    BRE Durability Report 60 year lifespan

    Contractors Health and Safety Assessment Scheme (CHAS)

    PEFC Chain of Custody Certificate

    KLH Massivholz has a

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