(HEALTHSOUTH TREASURE VALLEY HOSPITAL)(UPGRADE OF LEAD-LINED WALLS / DOORS / GLAZING OF CT SCAN ROOM) Within an existing CT Scan Room, remove existing sheetrock from interior of walls as necessary to allow installation of new lead-lined sheetrock to increase the total lead shielding required for the room, doors and glazing. The north side of the CT Scan room is part of an existing 1-hour corridor that is to be maintained 1-hour rating. This will involves use of 5/8" type 'X' leadlined sheetrock on this wall with the 20 minute door / frame assembly being maintained and self-closing. Outlets in corridor wall will have listed membrane penetration fire-stop assembly. A new lead lined non-rated access door & frame is to be installed between existing Darkroom & CT Scan room. All as noted on plans. (drs)