Resistant classes<\/strong>
\nThey are defined in UNE-EN 1194, which distinguishes 8 resilient classes, which are set out in the following tables (*):
\n– 4 when the composition is homogeneous (all sheets are of the same resistant class).
\n– 4 when combined (extreme sheets are of a superior sturdy class).
\n(*) in the latest drafts of UNE-EN 14080 these values are slightly modified.<\/p>\nDurability<\/strong>
\nWe must not forget in this topic the importance of the constructive design of the structure that avoids unnecessary exposure to the weather and the possibility of water retention. Proper design can reduce the risk of deterioration.
\nIn practice there are no durability problems in parts located in use classes 1 (indoor) and 2 (indoor and under cover without direct exposure to rainwater), virtually any species is suitable. In usage class 3.1 and especially at 3.2, 4 and 5
\nrequires a kind of increased natural durability or a protective chemical treatment.
\nUsually coniferous species in structures do not have sufficient natural durability (almost always incorporate part of albura that is not durable) and therefore, for use in use classes 3.1, 3.2, 4 and 5 require treatment. For the choice of the appropriate type of treatment you can consult the Basic Structural Safety Document \u2013 Wood and the standard UNE EN 335-2 that defines the types of use.<\/p>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text text_larger=\u00bbno\u00bb]The most commonly used species in Europe is the fir tree (Picea abies L. Karst), which is not impregnable, so its use is limited to the classes of use 1 and 2. Wild pine (Pinus sylvestris L.), is the most commonly used species for use class 3, as it can be treated in depth.
\nYou can choose a species with sufficient natural durability for the class of use corresponding to the structure, or apply the appropriate protection treatment provided that the wood is sufficiently impregnable before obtaining the sheets and gluing them between yes (it is the most common practice), or apply the treatment to the piece of glued laminated wood.
\nReaction to fire<\/strong>
\nIts type of fire reaction, according to UNE-EN 14080, is D-s2-d0 provided that it complies with its:
\n– Minimum mean density is equal to or greater than 380 kg\/m3 .
\n– Minimum total thickness of the part is equal to or greater than 40 mm.
\nIf the manufacturer defines a different type of fire reaction, he\/she must provide the corresponding test and classification report in accordance with UNE-EN 13501-1.
\nFire resistance<\/strong>
\nThe fire resistance of the structure involving glued laminated wood shall be calculated in accordance with the Fire Safety DB or in accordance with UNE-EN1995-1-2. The wood-dependent parameter is the rate of carbonization, which takes the effective values of: 0.5 to 0.7 mm\/min in sawn wood of leafy and glued laminated wood.
\nIssuance of formaldehyde<\/strong>
\nIn accordance with UNE-EN 14080, if the adhesive used in the manufacture of laminated wood contains formaldehyde it must be classified according to UNEEN 717-1 in the following emission classes E1 or E2.
\nChemical resistance
\nBy not reacting with the environment or with oxidizing or reducing agents, it becomes a suitable material for use in aggressive and corrosive environments, in which metals are limited in their applications.
\nSurface finish – Maintenance in outdoor applications
\nLike any other wood product placed outside they should receive finishes that protect the wood from infrared (heating) and ultraviolet (oxidation) rays.
\nMANUFACTURE, STORAGE AND TRANSPORT
\nManufacturing<\/strong>
\nEquipment, environmental manufacturing conditions, manufacturing process, and self-control must be carried out in accordance with the specifications of UNE-EN 386 or UNE-EN 14080 which will replace soon the previous one. It is common for the
\nmanufacturer is voluntarily subjected to external control by a renowned body.
\nStorage, transport and assembly<\/strong>
\nIt is recommended to apply a sealant, primer or coat them before they leave the factory.
\nDuring storage, transport and assembly, the parts shall be subjected to tensions higher than intended.
\nGlued laminated wood elements stored in construction shall be adequately protected from the weather. If possible it is recommended to cover them to avoid the action of rain and sun. They should be stored on crawls to avoid contact with the soil and on properly drained soils.
\nOnce placed it is not convenient to exceed the one month period without the protection of coverage.
\nFendas – Delaminations<\/strong>
\nDrying phenomena usually appear, due to variation in environmental conditions. On very particular occasions, delaminations may appear that are more psyer steepes caused mainly by poor manufacture.<\/p>\nSource: AITIM[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":"
[vc_row][vc_column][vc_column_text] Definition It is obtained by gluing two or more sheets of wood in a direction parallel to the blade<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/carpinteriafranciscocastro.com\/wp-json\/wp\/v2\/pages\/37808"}],"collection":[{"href":"https:\/\/carpinteriafranciscocastro.com\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/carpinteriafranciscocastro.com\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/carpinteriafranciscocastro.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/carpinteriafranciscocastro.com\/wp-json\/wp\/v2\/comments?post=37808"}],"version-history":[{"count":0,"href":"https:\/\/carpinteriafranciscocastro.com\/wp-json\/wp\/v2\/pages\/37808\/revisions"}],"wp:attachment":[{"href":"https:\/\/carpinteriafranciscocastro.com\/wp-json\/wp\/v2\/media?parent=37808"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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