The inside of frames shall be lined with a single thickness of sheet lead.
The thickness of the lead lining shall be the same as the lead lining of
the system in which the frames are used. Linings shall be installed at the
factory, and shall be continuous. Lining shall be formed to contour of
frame. Lead shields shall be formed around areas prepared to receive
hardware. Each lining shall be wide enough to provide and maintain an
effective lead lap with the lead of the adjoining shielding units.
2.13
FILM CASSETTE TRANSFER CABINETS
Cassette transfer cabinet shall be double-wall steel cabinet divided into
two compartments with doors of one cabinet plainly marked for exposed
cassettes and doors of the other cabinet plainly marked for unexposed
cassettes. Interlocking device shall prevent the doors on opposite ends of
the cabinets from being opened at the same time. Sheet lead lining of
cassette cabinet shall provide x-ray absorption equal to the X-ray
absorption provided by partition in which the cabinet is installed.
Cabinets shall have identification marking. Cabinet floor shall be
corrugated rubber with chrome-plated door knobs.
2.14
OPERATORS PROTECTIVE SCREEN
Operators protective screen shall be constructed [of studs, surfaced with
lead-lined [gypsum lath conform to ASTM C 37/C 37M] [gypsum wallboard
conforming to ASTM C 36/C 36M] secured to studs with appropriate fasteners,
with lead washer or tabs.] [of sheet lead laminated between plywood panels,
19 mm 3/4 inch thick conforming to HPVA HP-1.]
2.15
DESIGNATING PLAQUES
2.15.1
Designating plaques shall be furnished and installed as specified below in
rooms and as indicated on the drawings. Locations where shielding
thickness changes, or is not continuous, shall be indicated on the plaque.
Plaque shall be of aluminum, plastic, bakelite, or other approved materials
and shall be [_____] mm [_____] inches high by [_____] mm [_____] inches
long to contain the required information as specified below.
2.15.2
X-Ray and Examination Rooms
One sign shall be provided for [dental x-ray room] [x-ray] [and]
[examination rooms] lettered as follows:
"THE PARTITIONS, THE DOORS, AND THE LEAD-LINED SHIELD OF THIS ROOM
HAVE BEEN INSULATED WITH SHEET LEAD [_____] mm THICK PROVIDING A
TOTAL LEAD EQUIVALENT PROTECTION OF [_____] mm."
2.15.3
Radiographic, Fluoroscopic, and Cystoscopic Rooms
One sign shall be provided for each room insulated with sheet lead lettered
as follows:
"SURFACES OF THIS ROOM HAVE BEEN INSULATED WITH
SHEET LEAD OF FOLLOWING THICKNESS TO A HEIGHT OF
2.1 m 7 FEET ABOVE FLOOR SLAB:
SECTION 13090
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