Dimensionally stable supports for timber construction.
glued laminated timber and laminated timber beams
AESTHETIC, ECOLOGICAL, HEALTH-CONSCIOUS
Components made of laminated timber (glulam) are statically load-bearing, high-quality wooden construction elements. As a result of grading the strength of the base material and the consistency created by layered construction, it is well-balanced and has greater load-bearing capacities than standard timber. Laminated timber and laminated beam timber are produced in accordance with DIN EN 14080 with DIN 20000-3 + DIN EN 15497 with DIN 20000-7.
Wood moisture max 15%
Cut heartwood-separated, planed, chamfered edges
BSH laminated timber n-vis
QLH®-Duo-plus® Douglas fir SELECT
rettenmeier® is your professional partner for quality products in the fields of specialist trade, wood construction and roofing. The benefits for our market partners range from comprehensive advice and information on all legal and product-related issues about creating ideal solutions through to the professional follow-up by our after-sales service.
|Sorting feature||Requirements for Si||Requirements for NSi||Comments|
|Technical regulation||DIN EN 14080||DIN EN 14080|
|Sorting class in accordance with DIN 4074-1||At least S 10K TS, C 24 in accordance with DIN EN 338||At least S 10K TS, C 24 in accordance with DIN EN 338|
|Wood moisture content||max. 15 %||max. 15 %||Prerequisite for the bonding|
|Dimensional accuracy of the cross-section||DIN EN 336 dimensional accuracy class 2 b ≤ 100 mm ± 1 mm, b ≥ 100 mm ± 1.5 mm||DIN EN 336 dimensional accuracy class 2 b ≤ 100 mm ± 1 mm, b ≥ 100 mm ± 1.5 mm||The dimension tolerances for lengths must be agreed between the purchaser and the supplier|
|Distortion||≤ 4 mm/2 m||≤ 4 mm/2 m||For comparison: DIN 4074-1: S 10 ≤ 8 mm/2 m|
|Longitudinal curvature||≤ 4 mm/2 m||≤ 4 mm/2 m||For comparison: DIN 4074-1: S 10 ≤ 8 mm/2 m|
|Surface quality||planed and chamfered||equalised and chamfered||The right sides (sides close to the core) must be facing outwards|
|Processing of the ends||Capped at right angles||Capped at right angles|
|Bonding the timber||DIN EN 14080||DIN EN 14080||Adhesive type I in accordance with DIN EN 301, characteristics of use in accordance with DIN 68141|
|Finger joint||DIN EN 15497||DIN EN 15497|
|Dimensional changes/differential swelling and shrinkage if the wood moisture changes by 1% each||0,24 %|
|Swelling and shrinkage isotropy ratio tangential to radial||2|
|Bulk density ρ (at approx. 15% wood moisture content) on average||450 - 480 kg/m³|
|Water vapour diffusion resistance coefficient µ (DIN 4108)||40|
|Thermal conductivity λR (DIN 4108)||0,13 W / (m*K)|
|Dimensional and form stability||Gut|
|Building material class (DIN EN 13501-1)||D-s2, d0|
|Building material class (DIN 4102)||B2 (normal entflammbar)|
|Burning rate on average||0,65 – 0,70 mm/min.|
|Not finger-jointed KVH®-1plus®||DIN EN 14081-1 with DIN 20000-5||CE mark|
|Finger-jointed KVH®-1plus®||DIN EN 15497 with DIN 20000-7||CE mark|
|QLH®-Duo/Trio-plus®||Laminated timber and laminated beam timber are produced in accordance with DIN EN 14080 with DIN 20000-3 + DIN EN 15497 with DIN 20000-7||CE mark|
The service life of wooden components used outdoors can be significantly increased if the issue of wood preservation is considered at the design stage. Otherwise, a component's useful life may be greatly affected by local conditions (high level of ambient moisture, permanent or occasional contact with water, lack of rear ventilation, etc.). On the other hand, favourable installation conditions can also considerably increase service life by, for example, preventing contact with soil or providing cover.
|UC||WMC/exposure||General conditions for use||Insects||Fungus||Wood rot||Wood pests in the sea||Leaching procedure||Durability class required|
|Dry (constantly <20%) mean relative air humidity up to 85%||Wood or wood product under roof, not exposed to weathering or moisture. Insect hazard can be excluded in accordance with 5.2.1.||No||No||No||No||No||1 - 5|
|1||Dry (constantly <20%) mean relative air humidity up to 85%||Wood or wood product under roof, not exposed to weathering or moisture.||Yes||No||No||No||No||1 - 4|
|2||Occasionally moist >20% mean relative air humidity > 85%. Or temporary humidification due to condensate.||Wood or wood product under roof, not exposed to weathering, a high ambient humidity can lead to occasional, but not permanent moistening.||Yes||Yes||No||No||No||1 - 3|
|3.1||Occasionally > 20% moisture content||Wood or wood product not under roof, with weathering, but with no permanent contact with the ground or water. Accumulation of water in the wood not to be expected, even within spatially limited areas.||Yes||Yes||No||No||Yes||1 - 3|
|3.2||Frequently > 20% moisture content||Wood or wood product not under roof, with weathering, but with no constant contact with ground or water, accumulation of water in the wood to be expected, including in spatially limited areas.||Yes||Yes||No||No||Yes||1; 2|
Besides the individual species of wood selected and its natural durability, the service life of timber can be significantly influenced by structural timber protection.
If wood is exposed to high levels of moisture for lengthy periods, it will be damaged by fungal decay. This can be prevented by the proper planning of structural measures to protect the wood at the execution stage.
Where possible, upright, load-bearing timber components should never come into direct contact with the ground in external areas. To protect them from splashing, it is advisable to maintain a minimum gap of approx. 15 cm (mounting on supports).
Horizontal wooden structures should likewise avoid any direct contact with the ground and be kept a sufficient distance from the subsoil. To prevent water from collecting, horizontal areas should always have a slight gradient.