CLT BBS has a multilayer construction, completely made of solid wood. By bonding the longitudinal and transverse layers together, any warping of the wood - swelling or shrinkage - is reduced to a negligible level. This means it can comfortably meet the requirements of a modern building material.
BBS is monolithic, that is to say that it is in effect a single piece of wood, with just 0.6% being environmentally friendly glue. The solid finished component is able to carry high loads, is fireproof, enables rapid construction without water, and has sound and heat insulating properties. It regulates the humidity of the air inside the building, creating a comfortable and balanced climate - in both summer and winter.
BBS makes design and construction easier. It guarantees defined structural-physical and mechanical properties, so that the designed building physics can be easily implemented and tested as well. Many designers regard this as being one of the greatest advantages of a BBS construction. No complexity of design. No films. No complicated details. Design, construction and inspection - all very simple.
CLT BBS is available in two different formats:
- BBS 125 system format: System width 125 cm
- BBS XL large format: maximum width 3.50 m
By combining both formats, designers and those responsible for construction can plan and build flexibly using cross laminated timber, taking advantage of each format.
CLT BBS is available in the following wood species, grades and finishes:
Species of wood: Spruce, larch, stone pine, white fir and BBS Antique (= steamed fir, with a rough brushed finish)
Qualities: Living areas AB (all wood types), industrial areas BC (spruce), non-visible NSI (softwood)
Surfaces: ground (visual quality), brushed (visual quality), planed (non-visible)
Species of wood: Spruce
Qualities: Living areas AB, industrial areas BC, non-visible NSI (softwood)
Surfaces: ground (visual quality, edge glued), planed (non-visible)
We have been using proven double longitudinal layer with BBS 125 for living area quality AB for years. This always consists of a 20 mm thick visual quality top layer, bonded to a second longitudinal layer that is at least 20 mm thick. This combines the best visual quality and high dimensional stability of the top layer with the substantial load bearing capacity of the element. The benefits of cross-laminated timber in visual quality can be seen after just one to three periods of heating.
Use our experience to your advantage.
uncomplicated | quick | dry
BBS solid wood construction combines the well-known advantages of solid structures such as sound insulation, fire protection, solid construction, retained value, etc. with the environmental benefits of a sustainable raw material, wood.
Prefabricated system component: short construction times, high degree of prefabrication, simple details
Crosswise construction: high dimensional stability, 2-axis load transfer possible
More space: relatively small component thicknesses are possible, creating an economic ratio of gross to net floor area.
Permeable: BBS acts as a vapour barrier, so that largely film free construction is possible
Wood mass: comfortable living environment, heat storage in winter, insulation in summer
Visual quality: pleasantly warm wood surfaces, nature in architecture
BBS elements meet all the criteria of solid construction: They meet the fire resistance requirements of REI 30-90, can be used for load-bearing and increase the effective thermal storage mass of a building.
BBS wall elements safely and soundly meet all the requirements for statics, reinforcement, fire protection and building physics. BBS walls can be used to make low energy and passive energy buildings. Due to their permeable structure and their ability to dampen peak values of indoor air humidity, constructing in BBS means a comfortable and balanced room climate and achieving all common thermal insulation values.
Designing a ceiling in BBS not only brings structural advantages such as self-supporting and dry construction, diaphragm action, dimensionally stable components, good fire protection and sound insulation. This type of construction also creates surfaces in visible quality and a high level of comfort due to the positive effect of the mass of wood on the indoor climate.
With an element width of 125 cm, BBS 125 has the ideal laying width to weight ratio. The individual ceiling elements act as load-bearing on two axes and are laid close together without joints. Under normal climatic conditions, no greater shrinkage gaps appear.
BBS is suitable for any roof shape, is water tight after only a short period of time and a finished visible surface can be created on the inside. BBS roof structures safely and soundly meet all the requirements for statics, reinforcement, fire protection and acoustics. BBS gives great heat insulation, storing heat as it does so. In the winter it helps create a cosy warm room temperature, while in the summer it provides the ideal protection against the overheating of the building (heat protection in summer).
The "Solid Timber Construction" manual compiled by binderholz and Saint Gobain Rigips Austria presents over 130 tested constructions for walls, ceilings and roofs. To make searching for the perfect structure easier, we have put it online.
In addition to the specifications for fire protection, the manual gives the more important values for sound and heat insulation, diffusion, effective thermal storage mass and mass per unit area as well as all the relevant environmental data. Well-known independent institutes such as Holzforschung [Wood Research] Austria, IBS Austria [Technical Fire Protection and Safety Research] or IFT Rosenheim [Windows] have tested, certified and classified all the structures. This means that designers and those responsible for construction can use the specified parameters to go straight to the design stage of a solid wood project without further approvals being required. When the order is placed, all necessary certificates, classification reports and general building inspection certificates (AbP) are (AbP) available from binderholz.
Using the user-friendly interface and inputting a few search criteria into the filter gives exactly the right construction and the correct technical and building physics details. The structures and details selected from the results of the system search can then be downloaded and be directly incorporated into the project design. Another important part of the online manual are around 1,600 different fixing details for walls, ceilings and roofs, which are available to download as 3D ifc files amongst other types, and so can be used for BIM processes.
CLT BBS is certified under different national approvals and the European Technical Approval.
Recognised European testing institutes regularly monitor all binderholz production workshops.
The BBS dimensioning program from binderholz provides an easy-to-use tool with which static, fire and vibration engineering verification can be performed, based on the Euro Codes.
BBS dimensioning program
To make BBS dimensioning understandable, binderholz has supported the development of a booklet "CLT Dimensioning". This guide is designed on the basis of "from practical users, for practical users".
CLT Dimensioning - Fundamentals of Statics and Construction to Euro Codes
Please use the specialised knowledge and experience of our technical staff and structural engineers, who would be happy to advise you.
Planning, designing and building with BBS is very simple.
A variety of standard solutions for different applications can be found directly in our BBS documentation.
Build on our extensive and in-depth technical knowledge of cross-laminated timber:
· Many years of experience in the use of BBS by supplying and giving technical support to major international projects.
· Experienced and competent staff are on hand to offer you a wide range of services: from technical sales and advice to technical design and work preparation right through
to structural calculations, constructive planning and building physics advice.
· Constant research, development and certification work that guarantees contemporary and future-oriented building solutions in solid wood.
Much can be shown online and in printed form. Nevertheless, as ever, there is no substitute for a personal conversation with experienced binderholz staff. They always provide advice in line with the latest technological ideas and have extensive knowledge of practical detailed solutions.
Take advantage of our extensive range of services -
· technical advice and information
· Concepts for structural analysis, design, building physics, fire protection and detailed solutions
· Cost calculations
· Technical planning, CAD plans and BIM planning processes
· Static and building physics calculations
· Logistics planning and solutions
Want to find out more? Please contact us directly on fon +43 6245 70500-0
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