A floor screed Should be provided, flat to within a tolerance of +/-3mm over any 3 metre area, Onto this sub-floor, a self-leaveling compound should be laid prior to lying of the floor finish, Copper grounding strips (0.05 thick, 50 mm width) should be laid flat on the floor in the conductive adhesive and connect to copper wire of grounding. The floor finish in the operating room should be 2mm Conductive PVC tiles, laid on semi-conductive adhesive base. The floor finish should terminate at the room perimeter passing ovea concealed cove former and continuing up the wall for 100mm. All joints should be welded with electrodes of the same compitible material to provide a continious sealed surface. THe floor should have an electrical resistance of 2.5% 10 to 106 Ohms, as per DIN 51953 ATM F-1450 or NEPA 99.81 class of file resistance and should meet UIL standard 779. Fulfils product requirements as per EN 649. To maintain ste strically and the correct air pressure in the room all doors into an out should be of the sliding. hermetically sealing type. The door should meet following specifications.