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    Cross Laminated Timber (CLT)

    Cross Laminated Timber (CLT)

    Cross Laminated Timber (CLT) is an engineered wood product that is used frequently around Europe and is starting to become a popular building product internationally. CLT is produced using layers of timber, known as lamellas, that are glued together in multiple layers with the grain alternating at 90-degree angles for each layer. This gives the panels structural strength through the distribution of the grain strength of wood in both directions.

    The strength and versatility of these panels allows them to be used as walls, ceilings, roofs and floors. SCS can provide a number of recommended build ups in order to suit the project’s requirements, whether that be a certain thermal, acoustic or fire rating.

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    CLT is offered in 3 standard build-ups. Upon request, special surfaces and panel build-ups are possible, depending on the availability of the raw lamellas and technical feasibility.

    Maximum Dimension*: Length 16.50 m / Width 3.50 m / Thickness 0.50 m
    *Maximum dimension may be limited by the transportation solution available

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    CLT is available in three different surface qualities, which can be combined as required to all panel types.

    Domestic Visible Industrial VisibleNon-Visible
    Surface FinishHigh Quality Finish:

    Fully sanded (one or double sided) also one side brushed

    Medium Quality Finish:

    Fully sanded (one or double sided)

    Low Quality Finish:

    Equalised (planed or sanded)

    Application AreaVisible components e.g., living areas where the CLT will remain exposedVisible components that do not demand a high-quality finish e.g., industrial applications or car ports/garagePure structural components, typically covered by panelling such as cladding, plasterboard etc.
     ProductGlue Laminated Timber (Glulam) 
    ApplicationColumns, posts, beams etc.
    Strength ClassesGL24, GL28, GL30, GL32*
    AssemblyCombined (c) / Homogenous (h)
    ManufactureIn accordance with EN 14080
    Wood SpeciesSpruce
    Mechanical GradingIn accordance with EN 14081-3
    Lamellae40 mm
    AdhesiveModified melamine resin, light, non-darkening joints
    Moisture Content9 – 14 %
    Surface QualityPlanned on 4 sides, chamfered edges, visible quality, non-visible quality
    Combustion Behavior0.7 mm / min
    Fire BehaviorD-s2, d0
    Dimension ToleranceWidth +/- 2 mm

    Height +/- 2 mm

    Length +/1 0.1%

    Change in ShapeAxially 0.01-0.02 % per % change in moisture content

    Radially 0.19% per % change in moisture content

    Tangentially 0.34% per % change in moisture content

    Heat Conductivity0.13 W/mk
    Water Vapor 

    Resistance Coefficient

     μ = 40

    *Available on request 

    ComponentCombined GlulamHomogenous Glulam
    Strength

    Class

    GL24cGL28cGL30cGL32cGL24hGL28hGL30hGL32h
    Strength Values (N/mm2)
    Deflection

    (fm,g,k)

    2428303224283032

    CLT engineering are services provided by SCS and our experienced team. We have technically experienced in-house staff and a wide network of engineering consultants that we can engage in order to deliver your CLT solutions. We provide you with comprehensive advice and sound services throughout the whole process. Our qualified engineers and construction specialists can provide you with support throughout the whole process from initial design to completion. Our main services include:

    • Products and application specialising in the field of construction products
    • Structural engineering and physical characteristics
    • Fire engineering and data
    • Individual project consulting
    • Thermal and acoustic ratings
    • Energy reports
    • Advice on construction techniques, sealing and connection materials
    • Construction details and connection details
    • Application to Passive House principles
    • 3D planning and CAD drawing

    CLT products are perfect for residential and commercial projects. They have been successfully used for Passive House homes, low-rise apartment blocks, warehouses and other commercial buildings. CLT panels can be used in internal and external walls, floors, ceilings, staircases and roof structures. The natural properties of CLT mean high structural, fire, thermal and acoustic ratings can be achieved with minimal additions.

    SCS provides a range of standard construction solutions for wall, floor, ceiling and roof sections utilising CLT products. Please contact SCS for more information, some examples of these systems can be seen below.

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    Construction solutions are custom designed per project to achieve the desired structural, fire, thermal and acoustic ratings. A wide variety of local or European products can be used for the insulation, airtight membrane, tape, battens, cladding and plasterboard as required.

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