espaZio magazine Handbook 2015 | Page 15

(Environmental Product Declaration) is a must for tensile structures’ environmental development and an inevitable short term objective. The three R’s of Tensile Structures What are the most important strategies applicable to the improvement of sustainability in tensile structures? If sustainability depends on the closure of a material’s cycle (eliminating residue) caused by the habitability generated, then we can apply the three R’s rule. a) Reduce Reduce means using less: less material, less energy, less contamination…If we look at tensile structures we can see this reduction in its weight. Some air supported coverings of hundreds of square metres can weigh as little as 1 kg/m2. It would be hard to find another construction system that compares to this. This means using less material, less raw material, less transport (important when considering contamination), less assembly methods and ultimately, less end of life cycle residue. And this lightness doesn’t only come from using the estructural. La tracción es el esfuerzo que requiere menos material, sin importar la dimensión del elemento. Por el contrario la compresión, debido al fenómeno del pandeo, aumenta claramente el uso de material al trabajar con elementos largos y, finalmente, el esfuerzo de flexión también aumenta claramente (canto de la pieza) al aumentar las dimensiones. b) Reutilizar La propia ligereza de este tipo de estructuras provoca que sea el más usado en estructuras \