ITEM OF CONTRACT SPECIFICATIONS
ROAD RAIN DRAINAGE SHAFT IN VIBRATED CEMENT, PRODUCED IN COMPLIANCE WITH STANDARD DIN 4052, ROUND SECTION DN.450 WITH SEMISPHERIC BASE, RAISED EXTENSION AND LOAD DISTRIBUTION RING. THE LOWER INSERTION ELEMENT IS EQUIPPED WITH A DN16 JOINT AND GASKET EMBEDDED IN THE SEMISPHERIC BASE. THE TOP OF THE SHAFT MUST HAVE A FLAT BE-GU DRAIN, STANDARD DIN 1691, EXTERNAL SIZE 500×500, DRAINAGE AREA 1130 cm.2 AND BREAKAGE LOAD 250 KN. (class C) DESIGNED FOR THE INSERTION OF THE GALVANSIED STEEL BASE, TRUNCATED CONE SHAPE DN.385 mm. AND HEIGHT 250 mm. FOR EASY MAINTENANCE BU CLEANING PERSONNEL.