SolidTimber(KVH)
Linear structural element cut from a single log. In its modern form (KVH), it is artificially dried, calibrated and finger-jointed longitudinally to eliminate natural defects and ensure dimensional stability.
Off-centre cut scheme (KVH). By avoiding the central pith, solid timber experiences fewer internal stresses and reduces deep cracking.
It is the progenitor of all structural timber materials. Obtained by simply sawing the trunk, solid timber retains the visual and material authenticity of the plant, but requires care to accommodate its natural hygroscopic movements.
The strength of a solid timber beam is determined visually or by acoustic machines. To limit natural shrinkage cracking, modern technique favours free-of-heart cutting: the beam is obtained by removing the central pith of the trunk, the most unstable zone, subject to radial stresses during seasoning.
To overcome the dimensional limits of the trunk and the deformations of fresh timber, modern engineering introduced KVH (Konstruktionsvollholz): solid timber kiln-dried artificially to 15% moisture, planed, chamfered and finger-jointed longitudinally. This process turns traditional solid timber into a standardised, stable product available in lengths up to 13 metres.
Standards
European and international references applicable.
Physical properties
Usage environment
Must be installed at the equilibrium moisture content of the finished building. KVH dried to 15% inhibits fungi and wood-boring insects. Off-centre cut reduces radial stresses during seasoning.
Documented applications
TAV. DSecondary framing
Joists and purlins for traditional floors at close centres.
Platform Frame (Timber Frame)
Studs and plates for load-bearing light frame walls (North American framing system).
Architectural restoration
Targeted replacement of beams in historical buildings maintaining rustic aesthetics.
Pergolas and exteriors
Outdoor structures in naturally durable species (Larch, Oak) without chemical treatments.
Embodied Energy (MJ/m3, A1-A3) — shorter bar = lower environmental impact
TAV. EEmbodied energy per m3 of structural element (A1-A3). The raw solid timber has the lowest production energy of all building materials. The carbon stored in the wood (approx -650 kgCO2/m3 for softwood) more than offsets even KVH kiln-drying emissions.
Used in these systems
TAV. SOperational documents from this sheet
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