The execution rapidity, the possibility of progressive installations at contained and perfectly evaluable costs have given a big contribution to the quick diffusion of floating structures in substitution to the traditional fixed pontoons penalized, besides others, by updated rules and by the need to protect the environment. Standard Ingemar productions to day is divided in two families of modular elements with lenghts of 8 and meters and spans between m 1,60 and m 3,00.