Links
[1] http://design.rootiers.it/strutture/taxonomy/term/2
[2] http://design.rootiers.it/strutture/taxonomy/term/16
[3] http://design.rootiers.it/strutture/sites/default/files/users/MARICA.MARSILIA/SdC%28b%29_%28LM_PA%29/2017/Dimensionamento%20acciaio%20asta%20reticolare_0.xls