Extension made of Ligno® for the municipal elementary school Obering
Class goal: schools made entirely of wood!
In Germany, many school buildings are currently clearly reaching their limits. They are in need of renovation, are only partially suitable for modern teaching and learning concepts, or are simply too small. New space is needed - preferably made of wood, because this renewable natural material is ideal for constructing educational buildings quickly, sustainably and in an environmentally compatible manner. The city of Herford also opted for a wooden building for the extension of the Obering municipal elementary school: Walls, ceilings, roof and even the facade are made of configurable cross-laminated timber components from the Black Forest manufacturer Lignotrend. The modern wooden architecture provides a pleasant, natural learning environment as well as the best sound and fire protection and establishes good speech intelligibility in the interior rooms.
Configuration overview
Components used
LIGNO® Rippe Q3 | Ceiling component
Product code: LIGNO® Rippe Q3_185_r0_s0_z26_p26_a50g_625-12-4_WTL_gb_buvInstallation 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
_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
_625-12-4 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
_WTL Silver fir knotless, 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
LIGNO® Block Q3 | Roof component
Product code: LIGNO® Block Q3_275_rg0_s0_z26_p26_a50g_625-12-4_WTL_gb_buvInstallation 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
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
_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
_625-12-4 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
_WTL Silver fir knotless, 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
LIGNO® Uni Q3 | Wall component
Product code: LIGNO® Uni Q3_123_625-621-4_WTL_gb_buvStatics
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
Insulation joist
The lower the U-value of a component and the lower the psi value of the details, the less heat is lost.This is precisely where the U*psi® cross-laminated timber insulating uprights from Lignotrend come into effect:They implement high insulating thicknesses in natural timber and minimise thermal bridges.Insulation joist
Fleece as chamber separation
Reference-related
Downloads
Project participants
Hansestadt Herford
Hansestadt Herford
Auf der Freiheit 21
32052 Herford
xtraplan Döring + Harmann GbR
Bahnhofstraße 7
32756 Detmold
Frank Aussieker Architekturfotografie
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