CE CUBE DOIT ETRE DISPOSE DANS UNE FOSSE ENTIEREMENT CIMENTEE , RECOUVERTE D'UNE DALLE-ECRAN D'AU MOINS 100 KG/M2 COMME INDIQUE SUR LA FIGURE 4 CI-JOINTE , DE MANIERE QUE LA FACE SUPERIEURE DE LA DALLE-ECRAN AFFLEURE LE SOL .
THE CUBE SHALL BE SET IN A PIT CEMENTED THROUGHOUT , COVERED BY A SCREENING SLAB OF AT LEAST 100 KG/M2 , AS INDICATED IN THE ATTACHED FIGURE 4 , SO THAT THE UPPER SURFACE OF THE SCREENING SLAB IS FLUSH WITH THE GROUND .
