*
JOHNSTON ATOLL
F &S NO.
SCIENTIFIC
TITLE
01106
Screen Rooms
-
Subtask A905
USER
STRUCTURE /FACILITY NO.
SCIENTIFIC STATION NO.
TC
876 and 962
None
BoD
FOD
.
FUNDING
AGENCY
JTF
MILCON
($000)
ENGR
PROC
CONST
TOTAL
PRE-GO
Prior Cost
16.4
294. 0
310.4
TOTAL
16.4
294.0
310.4
FURN
CRO 9-64
COMPLETED
DESCRIPTION These two buildings (completed in 1967) are 40 x 90-ft. concrete
block structures with steel framed built-up roofs, and concrete floors. Each
building consists of a 40 x 58 x 20 1/2-ft. high assembly area and a 32 x 40 x
16 1/2-ft. high area which contains a 20 x 30 x 14-ft. high RF shielded enclosure
(screen room), a mechanical equipment room, a tool storage room, and a latrine.
The screen room, assembly area, and equipment room have floors coated with
spark-proof paint.
Double sliding doors, 16-ft. 8 in. x 19-ft. 2-in. high, are provided in the south
wall of the assembly area for monorail operations. The monorail has a 6-ton
hoist with a minimum hook height of 15-ft. and extends the width of the assembly
area plus approximately 19-ft. outside of the building. The screen room provides shielding protection in accordance with H& N-PC-38 and is the only portion
of the building that is air conditioned and dehumidified. The remainder of the
building is ventilated by roof mounted, gravity type explosion proof units. Wall mounted exhaust fans are also provided.
Each building is provided with 480 volt, 60 cycle, 3 phase power for operating
the air conditioning and dehumidifying unit, the exhaust fans, and the monorail
hoists. A 45 kva, 3 phase transformer provides 120/208 volt, 3 phase power
for lighting and other low-voltage requirements. All interior electrical instal lations in the assembly area,
screen room, and tool storage room are explosion
proof. Ground clips are provided at all exterior doors. A central compressed
air system located in Building 965 will provide 250 cfm of air at 90-100 psi.
Protective berms are provided on three sides of each building with the unpro-
tected side facing the runway (see F&S No. 02066).
DRAWINGS:
VOL I
91-960-A2
91-960-Cl1
91-960-S2
91-960-M1 and M2
91-960-E1
91-960-W]
91-962-Al
91-962-S]
1-84
91-962-Ml1
91-962-E]
91-030-W6, W7 and W23
91-097-SS1 and SS2