KRONOPLY OSB/3 is also available in long versions with lengths from 6.501 to 15 metres – the ideal wood-based materials for large applications. Sporting a ContiFinish^® finish, these stable boards for load-bearing applications are also suitable for use in high-moisture zones.

Storey-High Long Boards

KRONOPLY has a long tradition of developing innovative new products. One such innovation is the production of KRONOPLY OSB/3 boards with a length of 15 metres. In fact, the SWISS KRONO GROUP is the only company in the world able to produce 15-metre-long boards, having invested in a long-board stacking system at its Heiligengrabe, Germany plant.

Builders of prefabricated houses and commercial structures can take advantage of this KRONOPLY OSB innovation to create large-size wall and roof elements. It also offers producers of prefabricated elements for timber-frame houses new opportunities to increase efficiency and economise. Plus, the latest storey-high long boards from the KRONOPLY OSB product family, with a height of 2.8 metres, make it possible for a single board to extend the entire length of a building, completely eliminating butt joints. This does away with the need to lay plasterboard over it.

Applications

• Commercial buildings and prefabricated houses
  



		Strand direction
		Major axis			Minor axis
Nominal board thicknesses [mm]	d	6 to 10	>10 to 18	>18 to 25	6 to 10	>10 to 18	>18 to 25
Strength values [N/mm²]
Stresses on board
Bending	fm,k	18.0	16.4	14.8	9.0	8.2	7.4
Compression	fc,90,k	10.0			10.0
Shear	fv,k	1.0			1.0
Plate loading
Bending	fm,k	9.9	9.4	9.0	7.2	7.0	6.8
Tensile force	ft,k	9.9	9.4	9.0	7.2	7.0	6.8
Compression	fc,k	15.9	15.4	14.8	12.9	12.7	12.4
Shear	fv,k	6.8			6.8
Stiffness values [N/mm²]
Stresses on board
Modulus of elasticity	Emeana	4930			1980
Shear modulus	Gmeana	50			50
Plate loading
Modulus of elasticity	Emeana	3800			3000
Shear modulus	Gmeana	1080			1080
a The characteristic stiffness values E05 and G05 are calculated as follows: E05 = 0.85 x Emean and G05 = 0.85 x Emean
General and building physics values
Bulk density acc. to EN 323	m	600 kg/m³
Max. deviations in board thickness		± 0.8 mm (unsanded) | ± 0.4 mm (sanded)
Tensile strength perpendicular to plane acc. to EN 319	zul σZy	0.18	0.15	0.13	0.18	0.15	0.13
Thermal conductivity acc. to EN 13986	λ	0.13 W/mK
Water vapour permeability value	μ	200 / 300
Thickness swelling acc. to EN 317		≤ 15 %
Emissions class		E1 – 100% formaldehyde-free binders
Utilisation classes acc. to EN V 1995-1-1		1 + 2
Reaction to fire performance class acc. to EN 13501-1		D - s2, d0
CE certificate no.		1034 – CPD – 1291/1/09

Format [mm]	Thickness [mm]
	9	10	12	15	18	22	25	30	40
6501 mm to 15000 mm				•	•	•	•

Minimum order: 1 load per thickness and format

Laying and Boarding

• When laid closely with butt joints in interior walls, leave room for expansion where the boards adjoin other structures.

Coating and Varnishing

• KRONOPLY OSB with a ContiFinish^® surface may be coated with a solvent-containing PU (DD) or synthetic-resin varnish.
• Sanded surfaces may be coated like normal wood (e.g. with varnishes, paints, oils, waxes and glazes).
• It is advisable to apply at least three coats, sanding after the first one.
• Application of at least three coats is recommended.
• The only way to achieve an absolutely smooth surface is to apply filler.

Transport and Handling

• Take steps to prevent the boards, and especially the unprotected edges, from absorbing large amounts of moisture during transport and installation. Be careful not to damage the edges when lifting, moving and stacking boards (this applies especially to tongue-and- groove boards).
• Check against the labels or producer’s documentation on-site to make sure that the following are correct: thickness, approved utilisation class, surface (sanded or ContiFinish®) and edge type (square-edged or tongue-and-groove).
• During installation, boards may be briefly leaned against a solid structure at a 70° angle.
• Always carry individual boards in an upright (vertical) position.

Storage

• Protect boards from exposure to significant moisture or very high relative humidity.
• Prevent direct contact of the boards with the floor. ■ Only store outdoors temporarily, and if unavoidable cover stacks with watertight but water-vapour-permeable tarpaulins.
• Always stack boards horizontally on pallets and wooden supports (spaced no more than 600 mm apart).
• Align wooden supports precisely with one another and parallel to the shorter side of the boards.
• Lay the boards so their edges line up (with a maximum overhang of 15 mm).

Acclimatisation

• Precondition boards prior to installation.
• Store boards for about three days under the same climatic conditions that prevail at the installation site.
• This adjustment to the ambient moisture at the installation site will prevent excessive shrinkage or swelling.

Sawing, Milling, Sanding and Drilling

• KRONOPLY OSB can be sanded, sawn, milled and drilled just like solid wood and using all of the same tools.

Nailing, Stapling, Screwing and Gluing

• KRONOPLY OSB can be attached to wooden studs and rafters using screws, nails or staples.
• Use in accordance with the official approvals and standards (Z-9.1-618, Z-9.1-503 and DIN 1052 in Germany as well as EN 1995-1-1 (EC 5)).
• Additionally bond or glue tongue-and-groove joints.