Eurotec catalogue fastening technology Page 25
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Deck construction and landscaping Siberian Larch (Larix sibirica) low medium high BULK DENSITY COMPRESSIVE STRENGTH DEFLECTION RESISTANCE E-MODULUS Application: Deck construction, façades, solid-wood floorboards, window frames, fencing, approved structural timber. HARDNESS DURABILITY DIMENSIONAL STABILITY + Low swelling and shrinkage + Predominantly knot-free + approved structural timber – resin bleed possible – often originates from overexploitation, so questionable as a substitute for tropical timber (use only certified timber wherever possible) – moderate hardness Thermo ash low Installation instructions: • Centre distance in substructure: max. 60 cm • Joint width between the boards: 6 to 8 mm • Spacing between the butt joints: 3 to 4 mm Fastening recommendation: For direct fastening: Terrassotec, hardened stainless steel, 5,0 and 5,5 mm; Hapatec, hardened stainless steel, 5,0 mm; or Profile drilling screw, hardened stainless steel, 5,5 mm for Eurotec aluminium profiles. Pilot-drilling with drill stop recommended. (Fraxinus spp.) medium high BULK DENSITY COMPRESSIVE STRENGTH DEFLECTION RESISTANCE E-MODULUS General details: • origin: Central and Eastern Europe, North America • Colour: Dark brown; also greying as untreated timber • Durability class: 1–2; untreated: 5 • Properties: Low swelling and shrinkage, excellent dimensional stability, thermal treatment leads to reduction in strength and elasticity and causes the surface to become brittle. Application: Deck construction, parquet, floors, garden furniture, sometimes as a substitute for tropical timber, not to be used for structural applications. HARDNESS DURABILITY DIMENSIONAL STABILITY + + + + High durability No erosion Low swelling and shrinkage Very good dimensional stability + Substitute for tropical timber + Largely sourced from sustainable forestry – Surface made brittle by thermal treatment – Not for structural applications – moderate hardness Thermo-Beech low medium high BULK DENSITY DEFLECTION RESISTANCE E-MODULUS Fastening recommendation: Use Thermofix screw with drill point for the deck glider (brittle surface!). For direct fastening, use Terrassotec A4 5,5 mm or Profile drilling screw A4 5,5 mm for Eurotec aluminium profiles. It is always advisable to drill a pilot hole with a drill stop. General details: • origin: Central and South-Eastern Europe • Colour: Dark brown; also greying as untreated timber • Durability class: 1–2; untreated: 5 • Properties: Low swelling and shrinkage, excellent dimensional stability, thermal treatment causes reduction in strength and elasticity and makes the surface brittle, plain texture. Application: Deck construction, parquet, floors, worktops, sometimes as a substitute for tropical timber, not to be used for structural applications. HARDNESS DURABILITY DIMENSIONAL STABILITY High durability No erosion Low swelling and shrinkage Very good dimensional stability + Substitute for tropical timber + Largely sourced from sustainable forestry Installation instructions: • Centre distance in substructure: max. 50 cm • Joint width between the boards: 4 to 6 mm • Spacing between the butt joints: 3 to 4 mm (Fagus sylvatica) COMPRESSIVE STRENGTH + + + + General details: • origin: Western and Southern Siberia, Mongolia • Colour: Yellowish (European Larch: yellowish to reddish-brown) • Durability class: Varies from 1 to 4 depending on where it is grown • Properties: Very narrow rings, giving it a high wood density for softwood, high elasticity, low swelling and shrinkage, good to satisfactory dimensional stability, predominantly knot-free, low resin content, straight-grained texture. – Surface made brittle by thermal treatment – Not for structural applications – moderate hardness Installation instructions: • Centre distance in substructure: max. 40 cm • Joint width between the boards: 6 to 8 mm • Spacing between the butt joints: 3 to 4 mm Fastening recommendation: Use Thermofix screw with drill point for the deck glider (brittle surface!). For direct fastening, use Terrassotec A4 5,5 mm or Profile drilling screw A4 5,5 mm for Eurotec aluminium profiles. It is always advisable to drill a pilot hole with a drill stop. 25
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