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EWS - office building with cultural hall

Pioneering timber construction for Black Forest "electricity rebels" 

Bürogebäude in Holzbauweise in astreiner Weisstanne | EWS Schönau
LIGNO Dachbauteile mit Akustikprofil und Wandbauteile | integrierte LED-Lichtleisten | EWS Schönau

In 1994, opponents of nuclear and coal-fired power founded EWS Elektrizitätswerke Schönau GmbH out of a citizens' initiative - the nucleus of today's largest energy cooperative in Baden-Württemberg, EWS Elektrizitätswerke Schönau eG. They thus set an early milestone for the turn towards renewable energies. Within a short time, the "electricity rebels" moved their hometown to the centre of solar power generation in Germany. To create more space for the steadily growing number of employees, a four-storey office building was constructed with the Freiburg office of Harter + Kanzler & Partner Architekten. From the first floor upwards, the modern timber construction consists of configurable cross laminated timber components made of Ligno for walls, ceilings and roof with visible surfaces made of silver fir. By choosing the local building material, the Black Forest energy provider not only clearly acknowledges its roots and regional building culture, but also once again sets a sign for innovation - this time architecturally. 

Configuration overview

Components Used

  • LIGNO Rippe Q3   | Ceiling component

    Produktcode: LIGNO Rippe Q3_230-290_r0_ssp_z53_p26_a50g_625-18-6_WTE_gb_buv
    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 Akustik klassik).

    Installation top

    _r0 open, without cross grid

    Statics


    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.

    Statics

    _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

    _z53 REI 60 High fire resistance 

    Cavity


    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. 

    Cavity

    _p26 26 mm Height 

    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 50 % Absorber 

    Profile


    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.

    Profile 

    _625-18-6 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 

    Structure


    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.

    Structure

    _gb Brushed

    Treatment


    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.

    Treatment

    _buv UV-protection stain

  • LIGNO Rippe Q3   | Ceiling component  

    Produktcode: LIGNO Rippe Q3_150-210_r0_ssp_z26_p26_a50g_625-18-6_WTE_gb_buv
    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 Akustik klassik).

    Installation top

    _r0 Open, without cross grid

    Statics


    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.

    Statics

    _150-210 Small 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

    _z26 REI 30 Fire resistance   

    Cavity


    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. 

    Cavity

    _p26 26 mm Height 

    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 50 % Absorber 

    Profile


    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.

    Profile 

    _625-18-6 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 knotless, economy 

    Structure


    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.

    Structure

    _gb Brushed

    Treatment


    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.

    Treatment

    _buv UV-protection stain

  • LIGNO Uni Q3 Visual quality  |  Wall component 

    Produktcode: LIGNO Uni Q3_123_625-621-4_WTD_gb_buv
    Statics


    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.

    Element height

    _123 mm 

    Profile


    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.

    Profile 

    _625-621-4 Closed surface 

    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

    _WTL Silver fir, patterned

    Structure


    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.

    Structure

    _gb Brushed

    Treatment


    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.

    Treatment

    _buv UV-protection stain

Reference-related

Downloads

Project participants

  • HARTER + KANZLER & Partner

    Architect

    Gretherstraße 8
    79089 Freiburg
     

    www.harter-kanzler.de

  • Holzbau Amann GmbH

    Execution

    Albtalstraße 1
    79809 Weilheim

    www.holzbau-amann.de

  • Architekturfoto Olaf Herzog

    Photographer

    Lilienweg 6
    79183 Waldkirch
     

    www.olafherzog.de

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