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Day nursery "WUnderfitz"

Clever timber construction design with elements for large spans 

If there is a call for economic implementation, especially in the case of municipal "compulsory projects" such as educational institutions, architects do not necessarily have to compromise on building quality: In the course of their office practice, Schanz Architekten BDA have made a name for themselves above all by skilfully combining economy and architectural standards. They like to use wood as a building material, as in the case of the day-care centre in Hohentengen. With the multifunctional cross laminated timber components from Lignotrend, the planners solved several requirements at once: the decisive factor here was the simultaneous possibility of bridging large spans and creating excellent room acoustics with the best sound insulation and high-quality design. The prefabricated elements achieve faster construction progress and save expenses that would inevitably be incurred with other construction methods right from the start. In this way, even supposedly uneconomical architecture becomes cost-efficient. 

Configuration overview

Components used

  • LIGNO® Block Q3  |  Roof component

    Product code: LIGNO® Block Q3_230-290_rg0_s0_z0_p0_a50g_625-20-4_WTE_gs_b0
    Installation top

    Whether the element is open or closed at the top is determined by the area of application. If, for example, the element is to be filled with fill on site as a storey ceiling or roof terrace (LIGNO® Rippe Q3-x), its cavities are open at the top (feature _r0). To guide pipes at the top of the element, a cross grid (_r25, _r50) can be added to some superstructures. For roof superstructures, there is usually a flat closed finish _rg0 (LIGNO® Block Q-x, LIGNO® Block Q3-x or corresponding versions of LIGNO® Acoustic classic).

    Installation top

    _rg0 Closed, without cross grid


    The height of the load-bearing webs of the element is variable and determined according to static requirements from load and span. Within the framework of this configurator, the selection is limited to four height ranges. A more precise definition is made later during pre-dimensioning or verification with the LTB-x calculation programme. Bulk volume and/or necessary space for installations can also be decisive for the height.


    _230-290 Medium span 

    Fire resistance

    If fire protection is required, an additional layer is added below the web area (for elements with strip profiles _z26, _z53, _z80, for elements with board profiles Akustik klassik _k50g). Their height determines the fire resistance duration of the cross-section from 30 to 90 minutes. The fire resistance must be statically verified. If there are no requirements, the standard versions _z0 or _k50l are to be selected.

    Fire resistance

    _z0 R0 


    Panel designs with slat profiles and additional layer can be configured with an additional cavity (_p26, _p53) below the additional layer for installation guides, fixtures or to improve sound absorption. Cables laid there then do not penetrate the fire-protection layer. If required, the cavity is filled with insulating material (_p26mw, _p26ha) to improve acoustic absorption. If no cavity is necessary, the characteristic _p0 is selected. 


    _p0 No cavity

    Room acoustics

    If the soffit of the element is to have a good sound-absorbing effect, the penultimate layer is configured as absorber _a50g. Otherwise, this layer is configured as a solid wood layer _a0.

    Room acoustics

    _a50g Integrated absorber 


    The visible layer is profiled with joints. The code for profiling indicates in millimetres: Element width, strip width (rounded, from/to if applicable) and joint width (rounded) as well as a letter identification for variants, e.g. with chamfered strip edges or with additional height gradation. 

    Note: Some profiles indirectly cause exclusions for other configuration options.


    _625-20-4 Slat profile 

    Wood type

    Various wood species are available for the visible layer. For quality reasons, individual wood species cannot be configured for all profiles; for technical reasons, surface treatments are excluded for some wood species.

    Wood type

    _WTE Silver fir, economy 


    The face is subjected to a brushing _gb as standard, which produces a stronger or weaker structure depending on the type of wood and makes the surface less sensitive to scratches.  Alternatively, a smooth sanding _gs can be carried out, or on request a bandsaw cut _grimitated.


    _gs Sanded


    Depending on the type of wood, the optional application of a surface treatment is possible ex works. Individual colour finishes are always sampled for coordination. For elements in individual lengths, colour treatment is limited to max. 5 m length.


    _b0 Untreated 



Project participants

  • Schanz Architekten 


    Sportplatzweg 20

    79801 Hohentengen-Lienheim

  • Holzbau Boller-Berger GmbH


    Rheintalstraße 45
    79801 Hohentengen-Lienheim

  • Konrad Richter


    Rheinhalde 35
    79801 Hohentengen a. H.


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