CROSSWISE TOP PLY
Top plies in the crosswise direction to the panels (DQ) are mainly used for wall elements. Their bearing direction is vertical. DQ panels consist of three to five plies as standard. Production widths: up to 3.10 m.
CLT – Cross laminated timber
Key technical data
PFEIFER CLT is a large-format solid timber panel with maximum 15 layers of timber lamellae glued crosswise. Dried, strength- and quality-assorted, planed timber lamellae made of European conifer wood as well as formaldehyde-free polyurethane (PU) adhesive are used.
Features
Delivery programme
Surface qualities
Basic panel structure
CLT explained
Further explanations on the principle and layout of a CLT board can be found here.
| Product designation | PFEIFER CLT cross laminated timber |
| Application | Approval: 20/0023 Supporting and non-load-bearing construction elements in buildings and timber structures such as walls, ceilings or roofs |
| Usage class | NKL 1 and 2 (according to EN 1995) |
| Board construction | 3 to max. 15 crossed and glued layers (standard: 3 to 7 layers) |
| Layer option | max. 3 fibre-parallel layers (≤ 90 mm) possible |
| Board length | up to 14.50 m |
| Panel width | up to 3.10 m |
| Board thickness | 60 – 280 mm (standard), up to 320 mm on request |
| Lamella thickness | 20, 30 or 40 mm |
| Strength class of raw material | C24; a proportion of max. 10% C16 is permissible (acc. EN 338) |
| Surfaces | industrial quality (IQ), industrial area quality (ISQ) and living area quality (WSQ) |
| Types of wood | European conifer wood |
| Wood humidity | 12 ± 2 % (at the time of delivery) |
| Dimensional stability |
|
| Adhesive | Polyurethane (PU) adhesive (formaldehyde-free) for finger-jointing and surface glueing (according to EN 301 or EN 15425) |
| Weight | approx. 480 kg/m³ (to determine the transport weight) |
| Diffusion resistance | μ = approx. 60 (at u = 12 ± 2 %) |
| Air tightness | Class 4 (according to EN 12207) Airtight from 3 layers according to Report HFA of 29/11/2019 |
| Thermal conductivity | λ = 0.12 W/(m.K) |
| Specific heat capacity | cp = 1600 J/(kg.K) |
| Fire performance | D, s2, d0 (according to EN 13501) |
| Fire resistance / burn-up rate | ~ 0.7 mm/min. (for approximate calculations) |
| Recycling | Waste code: 17 02 01 (according to the Waste Incineration Ordinance (AVV)) |
| Formaldehyde class | E1 Equalisation concentration 0.01 ppm (according to Report HFA No. DLR 500038/2021 of 11/10/2021) |
The orientation principle
PFEIFER CLT relies on standardisation
The fibre orientation of the outermost ply is the bearing direction. Thanks to the use of dual plies, meaning top plies whose fibre orientation is the same (ss), the longitudinal or cross-stiffness or load bearing capacity of the panel can be increased on purpose. This purposeful change in the panel structure also increases its fire resistance. In case of special requirements towards appearance, changes in the structure can yield uniform visuals. PFEIFER CLT can theoretically be manufactured with up to 15 plies of cross-laminated wood lamellas.
LONGITUDINAL TOP PLY
CLT panels with top plies in longitudinal direction to the panel (DL) are primarily used for ceiling and roof elements. Their bearing direction is horizontal. They usually consist of three to seven plies.
3S CLT BOARDS
| PFEIFER CLT | 60 | 80 | 90 | 100 | 110 | 120 |
| 3s | 3s | 3s | 3s | 3s | 3s | |
| Grain direction | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL |
| Structure (mm) | 20-20-20 | 30-20-30 | 30-30-30 | 30-40-30 | 40-30-40 | 40-40-40 |
| Thickness (mm) | 60 | 80 | 90 | 100 | 110 | 120 |
| Lengths (m) | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m |
| Billing widths (m) | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps |
| Weight* (kg/m²) | 28.8 | 38.4 | 43.2 | 48.0 | 52.8 | 57.6 |
5S CLT BOARDS
| PFEIFER CLT | 100 | 120 | 140 | 150 | 160 | 180 | 200 |
| 5s | 5s | 5s | 5s | 5s | 5s | 5s | |
| Grain direction | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL |
| Structure (mm) | 20-20-20-20-20 | 30-20-20-20-30 | 40-20-20-20-40 | 40-20-30-20-40 | 40-20-40-20-40 | 40-30-40-30-40 | 40-40-40-40-40 |
| Thickness (mm) | 100 | 120 | 140 | 150 | 160 | 180 | 200 |
| Lengths (m) | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m |
| Billing widths (m) | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps |
Weight* (kg/m²) | 48.0 | 57.6 | 67.2 | 72.0 | 76.8 | 86.4 | 96.0 |
7S CLT BOARDS
| PFEIFER CLT | 180 | 200 | 220 | 240 | 260 | 280 |
| 7s | 7s | 7s | 7s | 7s | 7s | |
| Grain direction | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL |
| Structure (mm) | 30-20-30-20-30-20-30 | 20-40-20-40-20-40-20 | 30-30-30-40-30-30-30 | 30-40-30-40-30-40-30 | 30-40-40-40-40-40-30 | 40-40-40-40-40-40-40 |
| Thickness (mm) | 180 | 200 | 220 | 240 | 260 | 280 |
| Lengths (m) | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m |
| Billing widths (m) | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps |
Weight* (kg/m²) | 86.4 | 96.0 | 105.6 | 115.2 | 124.8 | 134.4 |
7SS CLT BOARDS
| PFEIFER CLT | 180 | 200 | 220 | 240 | 260 | 280 |
| 7ss | 7ss | 7ss | 7ss | 7ss | 7ss | |
| Grain direction | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL |
| Structure (mm) | 30-30-20-20-20-30-30 | 30-30-30-20-30-30-30 | 30-30-30-40-30-30-30 | 40-40-20-40-20-40-40 | 40-40-30-40-30-40-40 | 40-40-40-40-40-40-40 |
| Thickness (mm) | 180 | 200 | 220 | 240 | 260 | 280 |
| Lengths (m) | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m |
| Billing widths (m) | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps |
Weight* (kg/m²) | 86.4 | 96.0 | 105.6 | 115.2 | 124.8 | 134.4 |
8SS CLT BOARDS
| PFEIFER CLT | 300 | 320 |
| 8ss | 8ss | |
| Grain direction | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL |
| Structure (mm) | 40-40-30-40-40-30-40-40 | 40-40-40-40-40-40-40-40 |
| Thickness (mm) | 300 | 320 |
| Lengths (m) | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m |
| Billing widths (m) | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps |
Weight* (kg/m²) | 144,0 | 153,6 |
9SS CLT BOARDS
| PFEIFER CLT | 290 | 300 | 300 | 310 | 320 | 320 |
| 9ss | 9ss | 9ss | 9ss | 9ss | 9ss | |
| Grain direction | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL | Top layer lengthwise and crosswise possible DQ/DL |
| Structure (mm) | 30-30-10-30-30-30-10-30-30 | 30-30-40-30-40-30-40-30-30 | 40-40-20-40-20-40-20-40-40 | 40-40-20-40-40-40-20-40-40 | 40-40-20-40-40-40-20-40-40 | 40-40-30-40-20-40-30-40-40 |
| Thickness (mm) | 290 | 300 | 300 | 310 | 320 | 320 |
| Lengths (m) | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m | 8.00 m up to 14.5 m |
| Billing widths (m) | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps | 2.45 up to 3.10 m in increments of 5 cm steps |
Weight* (kg/m²) | 139,2 | 144,0 | 144,0 | 148,8 | 153,6 | 153,6 |
Further superstructures possible on request.
* Calculated with 480 kg/m³
ss Top layers consist of two longitudinal layers
PFEIFER CLT relies on visual appearance
Wood is a natural product that swells and contracts depending on its changing moisture content. Careful technical drying counter-acts this effect. PFEIFER CLT is dispatched with a moisture content of at least 12 % +/- 2 % to minimise the formation of cracks and visible gaps. Thanks to expert processing the material achieves an excellent product quality. Our wood panels are available in various visible appearance classes for different applications, while all panels are sanded to a certain visible quality. The individual lamellas are sorted on the basis of defined criteria.
Area of application
INDUSTRIAL QUALITY (IQ)
Purely structural components for subsequent cladding (e.g., with plasterboards or 3-layer boards)
INDUSTRIAL AREA QUALITY (ISQ)
Visible components in subordinate areas, e.g., in commercial and industrial buildings or which are noticeable at a greater distance (e.g., canopies), can only be used to a limited extent in residential areas
Living area quality (WSQ)
Visible components, especially for living areas. But also for kindergartens, schools and office areas. Treatment of the surface (on site) recommended (e.g., with glazes, UV protection, ...)
Requirements on the surface
INDUSTRIAL QUALITY (IQ)
No visual requirements on the surface, purely strength-oriented features (C24) with isolated joints, fall-off branches in the top layer, glue penetration as well as individual pressure points and dirt can occur, discolouration (e.g., blueness) possible, glue penetration possible
INDUSTRIAL AREA QUALITY (ISQ)
Medium requirements, increased optical criteria for cover lamellas, individual narrow joints; slight discolouration is possible
Living area quality (WSQ)
High requirement, special requirements with regard to a homogeneous surface structure and lamella quality, occasionally minor/slight discolouration possible
Production-related technical information
INDUSTRIAL QUALITY (IQ)
Finger-jointing visible in the cover lamellae, without glueing the narrow sides
INDUSTRIAL AREA QUALITY (ISQ)
Finger-jointing visible in the cover lamellae, to avoid shrinkage cracks, narrow-side glueing is dispensed with
Living area quality (WSQ)
Finger-jointing visible in the cover lamellae, to avoid shrinkage cracks, narrow-side glueing is dispensed with.
Chamfer
INDUSTRIAL QUALITY (IQ)
Without chamfer
INDUSTRIAL AREA QUALITY (ISQ)
Chamfer (approx. 5 mm) for DL boards (at the component edges), DQ without chamfer
Living area quality (WSQ)
Chamfer (approx. 5 mm) for DL boards (at the component edges), DQ without chamfer
Machining of the surface at the factory
INDUSTRIAL QUALITY (IQ)
Lamellae planed, only sanded on request, cross cut with DQ boards possible
INDUSTRIAL AREA QUALITY (ISQ)
Full-surface sanding (one side or both sides); cross cut with DQ boards possible
Living area quality (WSQ)
Full-surface sanding (one side or both sides); cross cut with DQ boards possible
Surface treatment at the factory
INDUSTRIAL QUALITY (IQ)
Not possible
INDUSTRIAL AREA QUALITY (ISQ)
Not possible
Living area quality (WSQ)
Is possible on request with external partners
Wood moisture (approx.) as delivered
INDUSTRIAL QUALITY (IQ)
12 +/- 2%
INDUSTRIAL AREA QUALITY (ISQ)
12 +/- 2%
Living area quality (WSQ)
12 +/- 2%
Cracks, Joints
INDUSTRIAL QUALITY (IQ)
INDUSTRIAL AREA QUALITY (ISQ)
Living area quality (WSQ)
Applies to all: Wood is a natural product, therefore: as with all structural solid wood products, crack and joint formation because of shrinkage to the later equilibrium moisture content (EMC) in the state of use is product-specific and cannot be avoided. The narrow sides are not glued.
Notes:
- Visible surfaces should always be sampled: contact us
- Exact criteria (e.g., branch sizes,...) of the surface options: on request
- Quality surfaces are possible on one side or both sides; the optical criteria do not apply to the narrow/front sides and machining edges
- For WSQ surfaces, changing the panel structure may be necessary