ITEM OF CONTRACT SPECIFICATIONS
SHAFT FOR COURTYARDS PLUVIALE IN VIBRATED CEMENT, PRODUCED IN COMPLIANCE WITH STANDARD DIN 4052, ROUND SECTION DN.300 WITH SEMISPHERIC BASE, RAISED EXTENSION AND LOAD DISTRIBUTION RING. THE LOWER INSERTION ELEMENT IS EQUIPPED WITH JOINT AND GASKET DN.110 EMBEDDED IN THE SEMISPHERIC BASE.