TECHNICAL FEATURES I~ covERlife® CARACTERIST/QUES TECHNIQUES ELECTRIC INSULATION SECURITE ELECTRIQUE Cover-Life sheets do not conduct electricity: therefore, they are not damaged by current leaking and resist to corrosion due to electrolitic actions. Les plaques Cover-Life presentent la caracteristique de ne pas etre conductrice d'electricite. On entendparsecurite electrique la propriete des plaques a ne pas subir de dommages du fait des dispersions du courant electrique, et en assurant la securite des personnes. RESISTANCE TO ENVIRONMENTAL FACTORS RESISTANCEAUXAGENTS CHIMIQUES ET AND CHEMICALS AMBIANTS Thanks to their multi-layer composition Cover-Life sheets withstand well many chemicals (in particular acids), atmosferic agents (for instance, saline mist and salts in general) and aggressive industrial emissions). Roofing sheets are therefore particularly suitable for animal confinement buildings (cowsheds, stables, pigsties): as amatter of fact, the fumes of animal wastes are very corrosive. Grace a leur structure stratifiee, Les plaques Cover-Life resistent a l'action des agents chimiques et atmospheriques ainsi qu'aux emanations agressives propres aux environnements industriels. Les plaques Cover-Life offrent une parfaite resistance aux agents chimiques tels que /'anhydride sulfureux des sites industriels ainsi qu'a /'action corrosive des sels marins, entre autres. De plus, Les plaques Cover-Life sont particulierement indiquees pour le secteur de l'elevage (etables, porcherie, etc.! ou Les emanations des dejections animales sont hautement corrosives. RESISTANCE TO ACCIDENTAL LOADS RESISTANCESAUXCHARGESACCIDENTELLES In the design of a roofing the possible presence of unplanned loads (such as snow or wind) must be taken into consideration together with the geographical region where the sheets are to be assembled. Snow is aphenomenon regularly occurring only in some regions where frequent snowfalls and low temperatures lead to accumulation and persistance of the snow mantle on roofings, causing a lot of trouble: breakages due to the diminished resistance to compressive stress, abrasion of the sheet surface, elements coming off or being washed away from the roofing mantle. Wind pressure and uplift also result in shock stress on the roofing. The regulations concerning wind load calculations consider the action of wind as a static factor, as a pressure which varies according to the degree of windiness of the geographical area, to the exposure and the surface area of the roofing. The effects ofwind and of the agents transported by it cause shock stress, abrasion and corrosion. Cover-Life sheets are very resistant to these accidental loads and pressures (for an optimum load bearing, we recommend you to check the correct purlin spacing in order to determine the breaking load of each different model). 121 Lars de la conception d'une couverture, ii faut tenir compte de surcharges accidentelles (par exemple, la neige ou le vent). La neige est un phenomene qui se produit de far;on reguliere que dons certaines regions. Dons ces zones, Les chutes de neige frequentes et les temperatures basses facilitent /'accumulation et la persistance du manteau neigeuxsur la couverture. Ces caracteristiques provoquent des problemes divers tels que /'abrasion de la surface de couverture, le decollement et le glissement des elements qui constituent la couche de neige, la fissuration et la rupture des elements ayant une resistance limitee aux sollicitations de compression. De plus, le vent peut agir mecaniquement sur la couverture du fait du phenomene de pression et de depression. Les normes relatives au ea/cul des charges au vent attribuent a /'action de celui-ci un caractere statique, et une pression variable selon le niveau d'exposition du vent propre a la zone geographique, au type d'exposition et a la superficie de /'element de couverture. Le vent entraine done une sollicitation mecanique ainsi qu'une action abrasive et corrosive exercee par Les agents qu'il transporte.
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