Eurotec catalogue fastening technology Page 23
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Deck construction and landscaping garapa low (Apuleia spp.) medium high BULK DENSITY COMPRESSIVE STRENGTH General details: • origin: South America, trade name encompasses various species • Colour: Honey yellow, later darkening to yellowish brown or golden brown • Durability class: Varies between 1 and 3 • Properties: Moderate to high swelling and shrinkage, satisfactory to moderate dimensional stability, plain, homogeneous texture. DEFLECTION RESISTANCE Application: Deck construction, furniture, window frames E-MODULUS HARDNESS Installation instructions: • Centre distance in substructure: max. 60 cm • Joint width between the boards: 6 to 10 mm • Spacing between the butt joints: 3 to 4 mm DURABILITY DIMENSIONAL STABILITY + High durability (variable) + High strength + Very high hardness – Possible erosion of constituent substances in the timber – often originates from overexploitation (use only certified timber wherever possible) – moderate dimensional stability Douglas Fir low Fastening recommendation: For timbers with high wood density and/or moderate dimensional stability, direct fastening of the boards is preferable to hidden. This applies above all to board thicknesses > 25 mm. 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. (Pseudotsuga menziesii) medium high BULK DENSITY COMPRESSIVE STRENGTH General details: • origin: North America, also cultivated in Europe since the 19th century • Colour: Light yellowish brown to red brown, resembles European Larch. • Durability class: 3–4 • Properties: High elasticity, low swelling and shrinkage, good dimensional stability, low resin content, fine texture. DEFLECTION RESISTANCE Application: Deck construction, façades, solid-wood floorboards, window frames, fencing, approved structural timber, sometimes used as a substitute for tropical timber. E-MODULUS HARDNESS DURABILITY 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 DIMENSIONAL STABILITY + + + + Low swelling and shrinkage good dimensional stability approved structural timber Substitute for tropical timber + Largely sourced from sustainable forestry Cumarú low – resin bleed possible – moderate durability but sufficient for deck construction – moderate hardness (Dipteryx spp.) medium high BULK DENSITY COMPRESSIVE STRENGTH DEFLECTION RESISTANCE E-MODULUS General details: • origin: Northern South America, trade name encompasses various species • Colour: From yellowish to red to violet brown, later darkening to yellowish brown to olive brown • Durability class: 1 • Properties: High swelling and shrinkage, good to satisfactory dimensional stability, extremely high strength, very high hardness, homogeneous texture. Application: Deck construction, floors subject to heavy loads, structural timber, sometimes used in water engineering. HARDNESS DURABILITY DIMENSIONAL STABILITY + Very high durability + Extremely high strength + Very high hardness 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. It is always advisable to drill a pilot hole with a drill stop (risk of splintering). – Possible erosion of constituent substances in the timber – often originates from overexploitation (use only certified timber wherever possible) – moderate dimensional stability 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 timbers with high wood density and/or moderate dimensional stability, direct fastening of the boards is preferable to hidden. This applies above all to board thicknesses > 25 mm. For direct fastening: Terrassotec A2 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. 23
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